Linear Technology LTC2933 User manual

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DEMO MANUAL DC1633B
DESCRIPTION
Programmable Hex
Voltage Supervisor Featuring
the LTC2933 with EEPROM
The DC1633B is a demonstration system that showcases
the LT C
®
2933,a6-channel I2C/SMBus voltage supervisor
with EEPROM. The LTC2933 simultaneously monitors up
to six power supply voltages and detects under/overvolt-
age conditions. In addition the LTC2933 monitors two GPI
pins and is able to drive three GPIO pins to indicate OV,
UV, system reset, system alert, or other control signal.
The DC1633B is a single circuit board that contains the
LTC2933andsupportcircuitry to provide the ability to dem-
onstrate features and capabilities of the LTC2933 without
the need for external power supplies. The DC1633B demo
boardprovidesanaccuratevoltagesupervisionofsixchan-
nels and offers over/undervoltage thresholds in various
ranges and increments that are digitally programmable.
This demonstration system is supported by the
LTpowerPlay™graphical user interface(GUI)which enables
complete control of all the features of the device. Together,
the LTpowerPlay software and DC1633B hardware system
create a powerful development environment for designing
and testing configuration settings of the LTC2933. These
settingscanbestoredinthedevice’sinternal EEPROM or in
a file. This file can later be used to order pre-programmed
devicesor to program devices inaproduction environment.
The software displays all of the configuration settings and
real time measurements from the system supervisor and
peripheralICs. Telemetry allows easy access and decoding
of the fault log created by the LTC2933. The board comes
pre-programmed with the EEPROM values appropriate
for the six power supply rails on the DC1633B. Just plug
and play!
The LTC2933 chip is mounted on the topside of the board
with support ADC and DAC circuitry on the back. The ADC
provides voltage readings for all six voltage supervisor
inputs on the LTC2933 and also reads the GPI and GPIO
L, LT, LTC, LTM, Linear Technology, the Linear logo and PolyPhase are registered trademarks
and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are
the property of their respective owners. Protected by Patents including 7382303, 7420359,
7940091.
voltages. The DAC drives five programmable voltages
that are used to emulate the user’s system rails. The extra
support circuitry allows the user to evaluate the LTC2933
quickly and without the need for external voltmeters or
power supplies.
The DC1633B demo board can be powered by an external
power supply, such as a +12VDC supply. Communication
with the software is provided through the DC1613 USB-to-
I2C/SMBus/PMBus controller. The following is a checklist
of items which can be obtained from the LT C website or
LT C Field Sales.
• USB-to-I2C/SMBus/PMBus Controller (DC1613)
• LTpowerPlay Software
DC1633B Features
• Supervise Six Power Supplies
• Powered from USB Dongle, Power Jack, or V1-V4
• I2C Adjustable OV/UV Trip Points
• Guaranteed Threshold Accuracy ±1%
• I2C/SMBus Serial Interface
• Internal EEPROM
• 256Programmable Thresholds per Channel
• Up to Three Range Settings per Channel
• Tw o General Purpose Inputs
• Three General Purpose Inputs/Outputs
• Programmable Output Delays
• Autonomous Operation without Additional Software
• Supported by LTpowerPlay GUI
• LTC2933 Available in 16-Lead DFN and SSOP Packages
Design files for this circuit board are available at
http://www.linear.com/demo/DC1633B

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DEMO MANUAL DC1633B
PERFORMANCE SUMMARY
COMMON CHARACTERISTICS SPECIFICATIONS VALID OVER FULL OPERATING TEMPERATURE RANGE
PARAMETER CONDITIONS
VALUE
MIN TYP MAX UNITS
Supply Input Voltage Range VIN1
VIN2 through VIN4
3.4
3.4
13.9
5.8
V
V
V1 Threshold Accuracy ±1.5 %
V1 Monitoring Range Medium Range
High Range
1
2.5
5.8
13.9
V
V
V2 to V6 Threshold Accuracy ±1.0 %
V2 to V6 Monitoring Range Precision Range
Low Range
Medium Range
0.2
0.5
1.0
1.2
3.0
5.8
V
V
V
Table 1. Default Thresholds and GPIO Mappings
Vn_THR_HI Vn_THR_LO GPIO1 GPIO2 GPIO3
Default Thresholds OV ALERT UV
V1 5.5 4.5 Comp_Hi Comp_Hi Comp_Lo
V2 2.6V 2.4V Comp_Hi Comp_Hi Comp_Lo
V3 2.1V 1.9V Comp_Hi Comp_Hi Comp_Lo
V4 1.6V 1.4V Comp_Hi Comp_Hi Comp_Lo
V5 1.3V 1.1V Comp_Hi Comp_Hi Comp_Lo
V6 1.05V 0.95V Comp_Hi Comp_Hi Comp_Lo
Table 2. Default GPI Settings
MANUAL RESET MARGIN UVDISABLE AUX COMP
GPI1 ✓
GPI2 ✓

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DEMO MANUAL DC1633B
GLOSSARY OF TERMS
The following list contains terms used throughout the
document.
AUXC: Auxiliary Comparator. A GPI pin may be pro-
grammed to this function and map behavior to a GPIO
pin. Nominal VTH = 0.5V.
EEPROM: Non-volatile memory (NVM) storage used to
retain data after power is removed.
Margin: Term used typically in board level testing that
increases/decreases the output voltage to look for sensi-
tivity/marginality problems.
MARG:Ignore OV and UV faults when active (low). A GPI
pin may be programmed to this function and map behavior
to a GPIO pin. Nominal VTH = 1.0V.
MR:Manual Reset, Active Low. A GPI pin may be pro-
grammed to this function, map behavior to a GPIO pin,
and optionally clear the fault history. Nominal VTH = 1.0V.
NVM: Non-Volatile Memory, See EEPROM.
OV: Overvoltage. The result of a voltage comparison that
a pin voltage is above a programmable threshold voltage.
Rail:The final output voltage that the LTC2933 supervises.
Supervise: The act of quickly responding (compared
to a fault setting) to a voltage that is compared to pre-
programmed values.
UV: Undervoltage. The result of a voltage comparison that
a pin voltage is below a programmable threshold voltage.
UVDIS:UV Disable. Ignore UV faults when the pin is low.
A GPI pin may be programmed to this function and map
behavior to a GPIO pin. Nominal VTH = 1.0V.

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DEMO MANUAL DC1633B
THEORY OF OPERATION
GENERAL DESCRIPTION
The LTC2933 is a hex voltage supervisor which detects
an over or undervoltage and signals the system of a fault
condition. It does not have a dedicated power supply pin.
The chip is powered from the highest voltage applied to
V1 through V4, as long as one of these voltages is > 3.4V.
THE CHIP
The LTC2933integratessix voltage supervisors, two GPIs,
and three GPIOs. The V1-V6 supervisors are comprised
of OV/UV window comparators that can be programmed
to map the detection of a fault to one or more GPIO pin.
Figure 1. Simplified Block Diagram of Voltage Supervisor Input
GPI
INPUT OPTIONS
MANUAL RESET
MARGIN
UV DISABLE
AUXC (NO PULL-UP)
INTERNAL
LOGIC
GPIO
INPUT OPTIONS
INPUT/INPUT
OUTPUT OPTIONS
OUTPUT/OUTPUT WITH OPEN DRAIN
OUTPUT/OUTPUT WITH PULL-UP
SMBALERT (LATCHED) WITH OPEN DRAIN OR WITH PULL-UP
INTERNAL
LOGIC
Vn
Vn_THR_HI
Vn_THR_LO
GPIO
MAPPING
(Vn_CONFIG)
HIGH THR
SETTING
LOW THR
SETTING
HIGH
COMPARATOR
LOW
COMPARATOR
LOW FAULT
HIGH FAULT
GPIO2
GPIO1
GPIO3
GPI1 GPI2 DC1633B F01
In LTpowerPlay, the user programs each voltage supervi-
sor’s range, polarity, mapping, and high and low threshold
voltages.
Each channel’s high/low comparators may be mapped
to any GPIO pin, and any comparator may be mapped to
multiple GPIO pins. Typically the high comparator is used
for the overvoltage condition and the low comparator is
used for the undervoltage condition. The high comparator
is not dedicated to OV detection nor is the low comparator
dedicated forUVdetection. For example, both comparators
maybe configuredasOV with theVn_THR_HIsetto indicate
an OV Fault and the Vn_THR_LO set for an OV Warning.
The simplified diagram of a GPIO pin shows that the pin
may be configured as an active-high or active-low input
with optional pullup, or as an active-high or active-low
output with optional latched output.
The GPI input pins can be used to override fault conditions
by configuring them as MARG or UVDIS. The active-low
MARG function allows the LTC2933 to ignore OV and UV
conditions. The active-low UVDIS function is a special
case of the MARG function. It allows the device to ignore
UV conditions. The simplified diagram of a GPI pin shows
the four configurable options: Manual Reset, Margin, UV
Disable, and AUXC. The AUXC option does not provide
an internal pull-up.

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DEMO MANUAL DC1633B
THEORY OF OPERATION
THE BOARD
The LTC2933 chip is mounted on the topside of the board
with support ADC and DAC circuitry on the back. The sup-
port circuitry is powered from +5V.
TheADC provides voltage readings for all six voltage inputs
to the LTC2933 and also reads the GPI and GPIO voltages
foratotal of eleven. Although the ADC updates at a relatively
slow rate, it provides the equivalent of eleven 4½-digit
digital multimeters. The
simplest demonstration of
the DC1633B is to power
and control the board via
the DC1613 USB control-
ler. The controller provides
5V supply and I2C/SMBus
read/write control. This setup provides a quick and easy
way to demonstrate the LTC2933’s capabilities.
The multi-channel DAC emulates a 5-channel program-
mable power supply that is used to place “rail” voltages at
levels that replicate the user’s system rails. This avoids the
need for the user to wire actual supply rails to the demo
board. However, the board was designed to allow this use
case. The DAC output range is 0V to 4V. This is sufficient
for demo purposes. Simply place the V2-V6 jumpers to
“INT” for internal DAC use, and set to “EXT” if an external
supply is provided on the turret.
Figure 2. Simplified Block Diagram of the DC1633B
LTC2933
6-CH VOLTAGE
SUPERVISOR
WITH EEPROM
V1
V2
V3
V4
V5
V6
GPIO1
GPIO2
GPIO3
VDD33
GPI1 GPI2
BLUE/RED
BLUE/RED
BLUE/RED
GREEN
3.3VOUT
5V OR EXT
V1-V6, GPI1-2, GPIO1-3
V2-V6
I2C BUS
I2C BUS
24-BIT ADC
(LTC2499)
12-BIT DAC
(LTC2637)
POWER
SWITCH
(LTC4415)
5V LDO
(LT1761-5)
POWER JACK
6V TO 14V
GREEN
+5V FROM USB 5V
DC1633B F02
TOPSIDE COMPONENT
BOTTOM COMPONENT
EXT
INT
One LTC2637 (DAC)

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DEMO MANUAL DC1633B
THEORY OF OPERATION
POWERING THE BOARD
The DC1633B board can be powered from the DC1613
USB’s 5V power or from a wall-powered 12V supply (jack).
The LTC2933 hex supervisor can be powered in a number
of different ways. The chip itself is powered by any of the
inputs V1 through V4, as long as one is above 3.4V. There
is a table silk-screened onto the board as a reminder. An
internal diode-OR circuit automatically selects the highest
voltage of the four inputs. If the USB power or jack power
is present, the +5V LED will illuminate. The LTC2933
can then be powered by setting the jumper to “INT 5V”.
Alternatively set the jumper to “V1 EXT” to connect an
external power supply voltage to the V1 EXT turret. The
board comes pre-configured with jumpers JP1-JP6 set
to the INTERNAL position which allows the on-board 5V
LDO regulator to power all circuits.
NOTE: Turrets V2-V6 are tied directly to the LTC2933
independent of the jumper settings. Turret “V1 EXT” is
connected to the V1 pin when the jumper is set to V1 EXT
and is not connected to the V1 pin when the jumper is set
to “INT 5V”. To monitor the V1 pin voltage with a scope
probe or DMM, a test point is provided next to the jumper.
The DC1633B uses a multiplexed ADC that is used to
provide voltage readback values. Due to the nature of
a multiplexed ADC converter, it has an associated ADC
loop time. The total ADC loop time is ~400ms for a given
channel. You may notice some lag in the update rate of
the displayed voltages.
SELECTING A DEVICE ADDRESS
TheDC1633Bhas ajumper(JP7)labeledASEL whichallows
the user to select one of three I2C addresses. See Table 3.
Table 3. Address Selection of LTC2933
I2C ADDRESS (7-BIT) POSITION DEFAULT
0x1C L ✓
0x1D Z
0x1E H
Regardless of the jumper setting, the part will always
respond to the I2C global 7-bit addresses 0x0C and 0x1B.
STATUS_WORD REGISTER
To clear a fault, the user may click the CF icon in the
GUI or simply push the RESET pushbutton on the demo
board. In both cases, the red (+) on the CF icon and alert
LED on the board will be cleared. You will notice that all
rails are automatically re-enabled after a programmable
retry period. The alert LED may be cleared by clicking the
Clear Faults (CF) icon in the GUI. After clearing faults, the
system tree may remain “yellow” if any non-volatile fault
logs are present.
RESTORING RAM AND GUI FROM LTC2933
To restorethe operating memory (RAM)from the LTC2933
EEPROM contents, click the “R” NVM-to-RAM icon in the
toolbar. To read the RAM registers into the GUI, click the
“R” RAM-to-PC icon in the toolbar.

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DEMO MANUAL DC1633B
DC1633B LEDS
The DC1633B board has two green LEDs. When USB
power (DC1613 Controller) or external power (6V-14V
jack) is applied, the +5V green LED will illuminate. The
+5V supply provides power to the support circuitry, not
necessarily to the LTC2933. The default setting of jumper
JP1 is set to internal 5V and the +3.3V OUT LED will
illuminate, indicating the LTC2933 is powered. This LED is
not a power good indicator and may falsely indicate proper
operation when dimly lit. It may be slightly illuminated if
the highest voltage on the V1-V4 inputs are set as low as
1.8V. At this point, the LTC2933 is not in a functioning
state, the I2C bus will not communicate with the GUI, and
the LTC2933 will be grayed out in the system tree.
THEORY OF OPERATION
DC1633B ToolWindow and GUI Indicators
The ToolWindow displays the ADC readings on the left and
DAC voltage settings on the right. The blue/red indicators
next to the GPIs and GPIOs display the state (H vs L) and
voltage reading from the ADC (LTC2499). Blue indicates a
logic high and red indicates a logic low. The ToolWindow
is automatically populated when LTpowerPlay detects the
DC1633B demo board when it starts.

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DEMO MANUAL DC1633B
LTpowerPlay GUI SOFTWARE
LTpowerPlay is a powerful Windows-based development
environment that supports Linear Technology Power
System Management ICs with EEPROM, including the
LTC2933 6-channel voltage supervisor. The software
supports a variety of different tasks. You can use
LTpowerPlay to evaluate Linear Technology ICs by con-
necting to a demo board system. LTpowerPlay can also
be used in an offline mode (with no hardware present) in
order to build a multi-chip configuration file that can be
saved and reloaded at a later time. LTpowerPlay provides
unprecedentedsystemlevel diagnostic and debug features.
It becomes a valuable diagnostic tool during board bring-
up to program or tweak the power management scheme
in a system or to diagnose power issues when bringing
up rails. LTpowerPlay utilizes the DC1613 I2C/SMBus/
PMBus controller to communicate with one of many po-
tential targets, including the DC1633B demo system or a
customer board. The software also provides an automatic
update feature to keep the software current with the latest
set of device drivers and documentation. The LTpowerPlay
software can be downloaded from:
http://www.linear.com/ltpowerplay
To access technical support documents for LT C Power
System Management Products visit "Help, View Online
Help" on the L
TpowerPlay menu.
Figure 3. Screenshot of the LTpowerPlay GUI

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DEMO MANUAL DC1633B
QUICK START PROCEDURE
Thefollowing proceduredescribeshow tosetup aDC1633B
demo system.
1. Download and install the LTpowerPlay GUI:
www.linear.com/ltpowerplay
2. Remove the board from the ESD protective bag and
place it on a level surface. Connect the DC1613 I2C/
SMBus/PMBus Controller to the DC1633B board using
the 12-pin ribbon cable.
Figure 4. Connecting DC1633B Board and the DC1613
USB to I2C/SMBus/PMBus Controller
3. Plug the USB-to-I2C/SMBus/PMBus Controller into a
USB port on your PC. The board should power up with
+5V and +3.3V OUT LEDs illuminated green. The GPIO
LEDs will illuminate blue.
4. Launch the LTpowerPlay GUI.
a. The GUI automatically identifies the DC1633B and
builds a system tree for each I2C device. The system
tree on the left hand side will look like this:
5. Load the Demo Configuration.
In the upper left hand corner of the GUI, select File >
Initialize DC1633B Demo > Demo Config (or Factory
Defaults). This will load the configuration settings into
the working RAM of the LTC2933, set the DAC outputs,
clear the status registers, and store the settings into
NVM (EEPROM). The ‘Demo Config’ file is the starting
point for the use cases. The ‘Factory Defaults’ file sets
the Vn thresholds that accommodate the initial powerup
state of the DAC outputs (2.048V).
SAVING A CONFIGURATION
You can make changes to the LTC2933 register values
and DAC settings. Save the demo board configuration to
a(*.proj) file by clicking the "Save" icon. This creates a
backup file. Name it whatever you like. Note that the DAC
settings are saved in the project file.
b. A green message box will be displayed momentarily
in the lower left hand corner confirming that the
DC1633B is communicating.
QUICK START VIDEO
There is a Quick Start video that covers the basic features
of the LTC2933 chip and DC1633B demo board. The video
can be accessed via LTpowerPlay by navigating to the Help
menu > DC1633B.

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DEMO MANUAL DC1633B
DC1633B DETAILS – TOP SIDE
Figure 5. DC1633B Top Side Details
Table 2. Default Jumper Configuration
REFERENCE DESIGNATOR SIGNAL NAME USAGE DEFAULT
JP1 V1 Selects Internal 5V vs External “V1 EXT” Turret Power INT 5V
JP2–JP6 V2–V6 Selects Internal vs External Voltage INT
JP7 ASEL Selects H/Z/L for LTC2933 Slave Address L

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DEMO MANUAL DC1633B
DEMO BOARD USE CASES
USE CASE #1
A common configuration for the LTC2933 dedicates the
V1 pin to the highest supply in the system and uses V2-V6
to monitor other voltages. The V1 pin provides power to
the chip and also is used to detect an OV or UV on the V1
pin. For simplicity, the USB controller (DC1613) powers
the board and the LTC2933 is powered via the V1 pin with
the jumper set to INT 5V.
Each of the high comparator fault outputs is mapped to
GPIO1, indicating an active-low OV fault. Each of the low
comparator fault outputs are mapped to GPIO3, indicating
an active-low UV fault. These OV and UV conditions are
indicated in multiple places – LEDs next to the GPIO tur-
rets and also in the GUI. The GPIO2 pin has been mapped
as an active-low latched OV indicator. The latched ALERT
is cleared by pressing the GPI1 pushbutton. The GPIO
pins have a red-blue LED which is red when low and blue
when high.
The two GPI inputs are used to detect a Manual Reset
(MR) and Margin disable (MARG) and activated when the
pushbutton switches are depressed.
GPIO1 →OV fault
GPIO2 →ALERT (latched)
GPIO3 →UV fault
GPI1 →MR (manual reset)
GPI2 →MARG (ignore OV/UV when margining)
Let’smargin V5 and V6 low by typing avalue of 1V and 0.9V
into the respective DAC control boxes. You may also move
the DAC output by
clicking the up/
down arrows on
the individual DAC
box or by double-
clicking the DAC
value and entering
a new value in the
box. V5 and V6
will report a UV,
turning the LED on
GPIO3 red. The dashboard in the GUI indicates the V5
and V6 voltages are below the LO thresholds of 0.95V
and 1.1V. Also notice in
the Telemetry window a
STATUS_WORDregister,
expand it. This register is
a live indicator of LO or
HI fault conditions. Note
the state of LO_FAULT
bits when the margin low
buttonis selected. We can
demonstrate the effect of
the GPI2 pushbutton at
this point. The GPI2 pin
has been programmed to function as MARG, enabling the
LTC2933 to ignore all UV conditions. Notice that when the
pushbutton is depressed, GPIO3 returns high (blue). This
is useful when the system does not want to be informed
of a UV condition during margin low testing. Moving the
DAC voltages back to 1.2V and 1V returns GPIO3 to a high
state (blue), indicating there is no UV condition.
Let’s margin V5 and V6 high by typing a value of 1.4V
and 1.1V into the respective DAC control boxes. V5 and
V6 will report an OV in the GUI and on the demo board.
Both GPIO1 and GPIO2
LEDs will turn red and
the dashboard indicates
an OV condition and a
latched ALERT. Note
the state of HI_FAULT
bits in the STATUS_
WORDregister. When the
GPI2 button is pushed,
the GPIO1 (OV) LED is
returned to blue and the
STATUS_WORD reflects

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DEMO MANUAL DC1633B
DEMO BOARD USE CASES
the MARG pin as well, clearing the HI_FAULT bits. We
can now change the DACs back to 1.2V and 1.0V. The OV
condition is no longer present, however ALERT (GPIO2)
remains latched low. Since the GPI1 pin is defined as a
Manual Reset, pressing this button clears the latched
ALERT, turning GPIO2 LED blue which indicates a deas-
serted high state.
USE CASE #2
The DC1633B demo board can be configured to supervise
external supply voltages. Inputs V2-V6 may be used for
this purpose. Simply move the jumper from INT to EXT
which disconnects the backside DAC, allowing an exter-
nal voltage to be applied to the LTC2933. Please ensure
the max ratings on the turrets are not exceeded, most of
which are 6V. For simplicity, the V1 jumper will remain
in the INT 5V position to power the LTC2933. However,
in an actual application, the device is powered from the
highest voltage on the V1-V4 pins, assuming at least one
is above 3.4V.
Apply an external supply voltage to the turret. It is rec-
ommended to drive V1-V4 turrets with a low impedance
(<10Ω) voltage source. A sensor or other moderate source
impedance voltage may be supervised on V5 or V6 inputs.
A battery voltage may be supervised on V1-V4 and power
the chip since the LTC2933 supply current is <700µA.
For example, a +5V external supply may be connected to
turret V2. Notice the GPIO1 and GPIO2 LEDs turn red, indi-
cating OV and ALERT are asserted low. The V2 thresholds
need to be changed. Enter 5.5V and 4.5V for the HI and LO
threshold settings. The GPIO1 will return high and the LED
will change to blue but the GPIO2 remains low (red) since
it indicates a latched ALERT. Press the MR pushbutton on
GPI1 to release GPIO2 back high (LED blue).
The GPI inputs may also be used to monitor external
voltages. These pins can be configured as an auxiliary
comparator (AUXC). In this mode, the GPI pin voltage is
comparedto an internal0.5Vreference.Typicallyanexternal
voltage divider is provided to obtain the appropriate trip
point for the external voltage. The GPI comparators can
be mapped to one of the GPIOs to alert the system of an
over or undervoltage condition.

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DEMO MANUAL DC1633B
DEMO BOARD USE CASES
USE CASE #3
Another common configuration is one that uses a GPIO
pin to drive a system reset. The LTC2933 data sheet shows
this feature throughout. The other two GPIOs are config-
ured as previously shown, OV and ALERT. Additionally a
manual reset pushbutton (GPI1) asserts the system reset.
GPIO1 →RST (system reset)
GPIO2 →OV
GPIO3 →ALERT
GPI1 →MR pushbutton
3. Configure GPIO1 as active-low with weak pull-up. To
update the changes made in steps 1-3, click the Write
All Registers (PC->RAM) icon.
1.To program GPIO1tosystem reset function,first uncheck
the mapping of all V1-V6 channels to GPIO1.
4. You can optionally extend the low time of the system
reset by changing the delay-on-release setting to ensure
a clean release of reset. This provides a time-based
debounce of the switch.
When configured in this way, GPIO1 provides a system
reset for the host processor and GPI1 can drive a system
reset (GPIO1) with a push of a button. You may set the
GPIO1 delay-on-release time to 410ms to experience
the extended reset firsthand. The UV condition indicator
remains on GPIO3. The OV condition is indicated as a
latched ALERT on GPIO2. When the GPI1 pushbutton
is pressed, a system reset is asserted on GPIO1 and the
ALERT is released if the OV condition is removed.
2. Configure GPI1 as a Manual Reset. Map GPI1 to
GPIO1.
LTC2933 SYSTEM
V1 V2 V3 V4 V5 V6
GPIO1
GPIO2
GPIO3
SDA
SCL
GPI2
GPI1
MR
RST
OV
ALERT
MARG

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DEMO MANUAL DC1633B
DC1633B DETAILS – TOP

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DEMO MANUAL DC1633B
DC1633B DETAILS – BOTTOM

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DEMO MANUAL DC1633B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 U1 IC PROG HEX VOLT SUPERVISOR EEPROM SSOP16 LINEAR: LTC2933CGN#PBF
Additional Demo Board Circuit Components
2 16 C1, C2, C3, C4, C5, C6, C8, C9,
C10, C11, C12, C13, C14, C19,
C27, C34
CAP CER 10nF 25V 10% X7R 0603 MURATA: GRM188R71E103KA01D
3 9 C7, C15, C16, C17, C18, C26, C28,
C29, C33
CAP CER 100nF 16V 10% X7R 0603 MURATA: GRM188R71C104KA01D
4 3 C20, C21, C25 CAP CER 1µF 16V 10% X7R 0603 MURATA: GRM188R71C105KA12D
5 1 C22 CAP CER 22µF 25V 10% X5R 1210 MURATA: GRM32ER61E226KE15L
6 2 C23, C24 CAP CER 10µF 16V 10% X5R 0805 MURATA: GRM21BR61C106KE15L
7 0 C30, C31, C32 (OPT.) CAP CER 100nF 16V 10% X7R 0603
8 3 LED1, LED2, LED3 LED-DUAL-COLOR 1.6mm × 0.8mm RED-BLUE KINGBRIGHT: APHB1608QBDSURKC
9 2 LED4, LED5 LED GREEN SS TYPE BRIGHT SMD PANASONIC: LNJ326W83RA
10 3 Q1, Q2, Q3 MOSFET NCH DUAL 60V 180MA DIODES INC: 2N7002DWA-7
11 1 R1 RES 60.4kΩ 0.1W 0.1% ±25ppm 0603 SMD PANASONIC: ERA-3AEB6042V
12 5 R2, R3, R4, R5, R6 RES 20.0kΩ 0.1W 0.1% ±25ppm 0603 SMD PANASONIC: ERA-3AEB203V
13 6 R7, R8, R9, R10, R11, R12 RES 10.0kΩ 0.1W 0.1% ±25ppm 0603 SMD PANASONIC: ERA-3AEB103V
14 8 R13, R14, R41, R42, R44, R55,
R56, R57
RES 10.0kΩ 0.1W 1% 0603 SMD VISHAY: CRCW060310K0FKEA
15 2 R15, R16 RES 402kΩ 0.1W 1% 0603 SMD VISHAY: CRCW0603402KFKEA
16 5 R17, R18, R61, R63, R65 RES 200kΩ 0.1W 1% 0603 SMD VISHAY: CRCW0603200KFKEA
17 3 R19, R20, R21 RES 604kΩ 0.1W 1% 0603 SMD VISHAY: CRCW0603604KFKEA
18 6 R22, R23, R24, R62, R64, R66 RES 100kΩ 0.1W 1% 0603 SMD VISHAY: CRCW0603100KFKEA
19 4 R25, R27, R29, R48 RES 3.0kΩ 0.1W 1% 0603 SMD VISHAY: CRCW06033K00JNEA
20 6 R26, R28, R30, R46, R58, R59 RES 1.0kΩ 0.1W 1% 0603 SMD VISHAY: CRCW06031K00JNEA
21 0 R31, R32, R33, R49, R51, R53
(OPT.)
RES 0Ω 0603 SMD (OPTIONAL)
22 8 R34, R35, R36, R37, R38, R50,
R52, R54
RES 0Ω 0.1W 0603 SMD VISHAY: CRCW06030000Z0EA
23 2 R39, R40 0Ω RESISTOR ARRAY, 4 RES, 1206 PANASONIC: EXB-38VR000V
24 1 R43 RES 49.9kΩ 0.1W 1% 0603 SMD VISHAY: CRCW060349K9FKEA
25 1 R45 RES 249Ω 0.1W 1% 0603 SMD VISHAY: CRCW0603249RFKEA
26 1 R47 RES 9.31kΩ 0.1W 1% 0603 SMD VISHAY: CRCW06039K31FKEA
27 1 R60 RES 1.50kΩ 0.1W 1% 0603 SMD VISHAY: CRCW06031K50JNEA
28 1 U2 IC ADC 24-BIT DELTA SIGMA 16-CH WITH I2C LINEAR: LTC2499CUHF#PBF
29 1 U3 IC OPAMP DUAL MICROPOWER LINEAR: LTC6078CMS8
30 1 U4 IC DAC 12BIT OCTAL WITH I2C LINEAR: LTC2637CMS-HMX12
31 1 U5 IC VREF SERIES PRECISION REFERENCE LINEAR: LT6654AMPS6-4.096
32 1 U6 FIXED 5V 100mA MICROPOWER LDO LINEAR: LT1761ES5-5#PBF
33 1 U7 2K-BIT I2C SERIAL EEPROM MICROCHIP: 24AA02T-I/OT
34 1 U8 DUAL 4A IDEAL DIODES with ADJ CURR LMT LINEAR: LTC4415IMSE#PBF

17
dc1633bf
DEMO MANUAL DC1633B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Hardware - For Demo Board Only
35 1 J1 CONN HEADER 12POS 2MM STR DL PCB FCI: 98414-G06-12ULF
36 1 J2 CONN PWR JACK 2.1mm × 5.5mm HIGH CUR CUI INC: PJ-002AH
37 6 JP1-JP6 2mm PIN HEADER 1×3 SULLINS: NRPN031PAEN-RC
38 1 JP7 2mm PIN HEADER 1×4 SULLINS: NRPN041PAEN-RC
39 4 MH1-MH4 SPACER STACKING #4 SCREW NYLON KEYSTONE: 8831
40 2 SW1, SW2 BLK SWITCH TACTILE SPST-NO 0.05A 12V C&K: PTS635SL25SMTR LFS
41 18 TP1-TP18 TERM SOLDER TURRET .219"H .109"L MILL MAX: 2501-2-00-80-00-00-07-0
42 1 TP19 TERM SOLDER TURRET .156"H .084"L MILL MAX: 2308-2-00-80-00-00-07-0

18
dc1633bf
DEMO MANUAL DC1633B
SCHEMATIC DIAGRAM
V1/+5V
V2 V3 V4 V5 V6
14V MAX
6V MAX
6V MAX
6V MAX
6V MAX
GPIO1
14V MAX
MOVE JUMPER TO "EXT" WHEN
APPLYING EXTERNAL VOLTAGE
MOVE JUMPER TO "EXT" WHEN
APPLYING EXTERNAL VOLTAGE
MOVE JUMPER TO "EXT" WHEN
APPLYING EXTERNAL VOLTAGE
MOVE JUMPER TO "EXT" WHEN
APPLYING EXTERNAL VOLTAGE
MOVE JUMPER TO "EXT" WHEN
APPLYING EXTERNAL VOLTAGE
JUMPER VIN1 FOR EXTERNAL POWER,
JUMPER +5V FOR INTERNAL POWER
GPIO2
14V MAX
GPIO3
14V MAX
*** Slave Address ***
0x1C if ASEL=low (default)
0x1D if ASEL=float
0x1E if ASEL=high
DIVIDE BY 7 DIVIDE BY 3 DIVIDE BY 3 DIVIDE BY 3 DIVIDE BY 3 DIVIDE BY 3
GPI1 GPI2
SDA SCL
6V MAX
6V MAX
GREEN
V1 Test Point
+3.3V OUT Test Point
(OPT.) (OPT.) (OPT.)
2 1
4 3
2 1
4 3
2 1
4 3
2 1
6V MAX
LTC2933
GND
GND
10nF 10nF 10nF 10nF
10nF 10nF
10.0k 10.0k 10.0k 10.0k 10.0k 10.0k
GND
GND GND GND GND GND
100nF
GND
60.4k 20.0k 20.0k 20.0k 20.0k 20.0k
10k 10k
+3V3
10nF100k
GND
604k
+3V3
GND
+5V
2N7002DWA
2N7002DWA
GND GND
10nF100k
GND
604k
10nF
100k
GND
604k
3k 3k 3k
1k 1k 1k
402k 200k
+5V +5V +5V
GND
10nF
GND
GND
10nF
GND
402k 200k
10nF
10nF
GND GND
10k 10k
10k
2N7002DWA
1.5k
200k 100k
100nF
100nF
100nF
100nF
GND GND GND GND
U1
3 2 1
6 54 7
8
9 10 11 12
13 14 15 16
C1
C2
C3 C4
C5 C6
R7 R8 R9 R10 R11 R12
C7
R1 R2 R3 R4 R5 R6
R13 R14
C12
R22 R19
1 2 3 4
JP7
34
5
61
2
Q2
34
5
61
2
Q3
C13
R23 R20
C14
R24 R21
LED1 LED2 LED3
R25 R27 R29
R26 R28 R30
R15 R17
SW1
C8
SW2
C9
R16 R18
C10 C11
R55 R56
R57
34
5
61
2
Q1
1
2
3
JP3
1
2
3
JP2
1
2
3
JP1
1
2
3
JP4
1
2
3
JP5
1
2
3
JP6
R60 LED4
R61 R62
C29
C30 C31 C32
DAC_CH6
I2C_SDA
I2C_SCL
DAC_CH3 DAC_CH4 DAC_CH5
ADC_CH8
ADC_CH7
ADC_CH0
ADC_CH1
ADC_CH2
ADC_CH3
ADC_CH4
ADC_CH5
DAC_CH2
ADC_CH6
ADC_CH9
ADC_CH10
ADC_CH11
LTC2933 PROGRAMMABLE HEX VOLTAGE
SUPERVISOR WITH EEPROM
1
M.P.
LTC2933
Demo Circuit 1633B
1. RESISTORS R1-R12 ARE 0.1% +/-25ppm, ALL OTHER RESISTORS
ARE 1% 0603.
2. ALL CAPACITORS ARE 16V 0603.
3. INTERNAL POWER FOR ADC/DAC/LEDs IS 5.0V
M.P.
CUSTOMER NOTICE
B
SCALE = NONE
LTC CONFIDENTIAL
FOR CUSTOMER
USE ONLY
PCB DES.
APP ENG. www.linear.com
-
V4 V3 V2 GPI1
V6 V5 V1 VDD33
GPIO3
ASEL GND
SDA
SCL
GPI2
GPIO2
GPIO1
BLUE RED BLUE RED BLUE RED

19
dc1633bf
DEMO MANUAL DC1633B
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
DAC SectionADC Section
*** Slave Address 0x22 (default) ***
CA2=low, CA1=high, CA0=low
*** Slave Address 0x14 (default) ***
CA2=low, CA1=low, CA0=low
4.096V Ref DO NOT INSTALL:
R31, R32, R33
5V LDO to power board
when +12V power present
GREEN
DO NOT INSTALL:
R49, R51, R53
0805
0805
Diode-OR
1210
2 1
ZERO OHM, 4X
ZERO OHM, 4X
LTC2499
GND
LT6654
GND
1uF
1uF
GND
GND
GND
GND
100nF
GND
CONN_DC1613
LTC4415IMSE
49.9k10k
GND
249
1k
9.31k
3.01k
10uF/16V
1uF
10uF/16V
GND
GND
GND
GND
GNDGNDGND
24AA02
GND
10k 10k
100nF
GND
GND
+5V
GND
100nF
LT1761-5
GND
22uF/25V
+5V
+5V
GND
100nF
GND
OPT OPT
0 0
GND
+5V
+5V
+5V
LTC6078
100nF
GND
GND
+12V
0 ohm 0 ohm
OPT
0
LTC2637CMS
0 OPT
OPT 0
OPT
0
+5V
GND
1k 1k
10nF
10nF
GND
GND
100nF
GND
200k 100k
200k 100k
GND
GND
100nF
GND
10nF
U2
8 9
10
11
12 13 14 15 16 17 18 19 20 21 22 23
28
1
30 24 27 25 26 35 37 36 38 2 3
7
29
4
6
31
32
33
34
39
5
1 2 3 4
5 6
U5
C20
C21
C18
R39 R40
J1
1 2 3 4 5 6 7 8 9
10
11
12
3 2 1 6 5 4 7 8 9
10 11 12 13 14 15 16
EXP
U8
R43R44
R45
R46
R47
R48
C23
C25
C24
LED5
1 2 3 4
5
U7
R41 R42
C26
C17
1 2 3 4
5
U6
C22
C15
R32 R33 R35 R36
3 21 5 67
84
U3
C16
R37 R38
R31 R34
U4
12
3 4
10
5
7 8
12 13 14 15
9
11
16
6
R50 R51 R53 R54
R49 R52
R58 R59
C19
C27
C28
R63 R64
R65 R66
C33
C34
1 3 2
DAC_CH2 DAC_CH3 DAC_CH4 DAC_CH5 DAC_CH6
ADC_CH1
ADC_CH2
ADC_CH3
ADC_CH4
ADC_CH5
ADC_CH7
ADC_CH8
ADC_CH9
ADC_CH10
VREF
VREF
VREF
ADC_CH6
ADC_CH0
I2C_SDA
I2C_SDA
I2C_SCL
I2C_SCL
ADC_CH11
ADC_CH12
ADC_CH12 ADC_CH13
ADC_CH13
MIKE P.
M.P.
LTC2933 PROGRAMMABLE HEX VOLTAGE
SUPERVISOR WITH EEPROM
LTC2933
Demo Circuit 1633B
1. ALL RESISTORS ARE 1% 0603.
2. ALL CAPACITORS ARE 16V 0603.
3. INTERNAL POWER FOR ADC/DAC/LEDs IS 5.0V
1
M.P.
CUSTOMER NOTICE
B
SCALE = NONE
LTC CONFIDENTIAL
FOR CUSTOMER
USE ONLY
PCB DES.
APP ENG. www.linear.com
-
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15
COM
F0
ADCINN
ADCINP
MUXOUTN
MUXOUTP
REF-
REF+
GND
VCC
SDA
SCL
CA2
CA1
CA0
NC
GND GND DNC
DNC
VIN
VOUT
+5V (100mA)
SDA
GND
SCL
+3.3V(100mA)
ALERT
GPO_1
OUTEN
GPO_2
GND
AUXSCL
AUXSDA
IN1 IN1 EN1 STAT1
OUT1
OUT1
CLIM1 CLIM2 IN2 IN2 EN2 STAT2
WARN2 WARN1
OUT2
OUT2
GND
SCL GND SDA VCC
WP
IN GND SHDN BYP
OUT
+INA
-INA
+INB
-INB
OUTA
OUTB
V+
V-
DAC_A
DAC_B
SCL
VCC
CA0
DAC_C
DAC_D
DAC_E
DAC_F
DAC_G
DAC_H
SDA REF GND
CA1
CA2

20
dc1633bf
DEMO MANUAL DC1633B
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2014
LT 1114 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LT C ) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LT C for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LT C from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LT C assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LT C currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LT C applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation