Analog Devices Linear DC2515 Quick setup guide

1
DEMO MANUAL DC2515A
Rev. 0
DESCRIPTION
LTC6810-1
Daisy Chain isoSPI
Battery-Stack Monitor
Demonstration circuit 2515A is a multicell battery-
stack monitor featuring the LTC
®
6810-1, a 6 channel
battery-stack monitor. Multiple boards can be linked
through a 2-wire isolated serial interface (isoSPI) to
monitor a long series of cells in a stack. The demo cir-
cuit also features reversible isoSPI enabling a redundant
communicationpath.
The DC2515 can communicate to a PC by connecting
directly to a DC2026 Linduino
®
One. The DC2026 must be
loaded with the appropriate program (called a “sketch”) All registered trademarks and trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
to control the battery stack monitor IC and receive data
through a USB serial port. The DC2026C provides a stan-
dard SPI interface which can be connected directly to a
DC2515 board (J4 Connector). Or, the SPI can be trans-
lated to isoSPI and then connected to a DC2515 isoSPI
port (J2/J1 connector). The DC1941 provides a single
SPI-isoSPI channel, and the DC2792 provides two SPI-
isoSPI channels for reversible operation.
Design files for this circuit board are available.
Specifications are at TA= 25°C
PARAMETER MIN TYP MAX UNITS
V+Supply Voltage 5.0 20 27.5 V
V+to C6 Voltage –0.3 V
C0/S0 Voltage 0 5 V
VREG Supply Voltage 4.5 5 5.5 V
VREF1 1st Reference Voltage, No Load 3.1 3.2 3.3 V
VREF2 2nd Reference Voltage, 5k Load to V–2.994 3 3.006 V
VBIAS IBIAS Voltage, READY/ACTIVE State 1.9 2.0 2.1 V
CPIN Input Range 0 5 V
Cell Count 6

2
DEMO MANUAL DC2515A
Rev. 0
HARDWARE SETUP
Wiring J3 Connector
The DC2515A demo circuit (board) connector pinout is
critical; correct wiring must be followed to avoid the risk
of damaging the demo board.
When connected to a battery stack, power for the DC2515
is provided by the cell group being monitored. To connect
the cell group, separate the screw-terminal block section
from the J3 connector. Then, insert the cell-voltage con-
nections or resistors into the screw-terminal clamping
contacts. These connections provide the power and input
stimulus for the battery stack monitor IC.
Cell-voltages are wired to J3 starting from position 4
(most negative potential of the group). Please refer-
ence the appropriate demo board J3 connector pinout
in Table1.
Alternatively, resistors can be used to simulate battery
cell-voltages. 100Ω 0.5W or equivalent resistors are rec-
ommended because 100Ω (or lower values) typically will
not induce measurement errors and the 0.5W (or greater
rating) will keep the resistor temperatures low preventing
power dissipation damage.
DC2515A 6 Resistor Connection
Carefully connect six 100Ω resistors onto the screw-
terminal block between each CPIN input clamping con-
tact from position 4 to position 10 as shown in Table1,
DC2515A J3 Pinout and Figure1, Resistor Divider String.
Provide a stack-equivalent power supply connection to
position 10 (positive) and position 4 (negative). The
power supply may be adjusted to provide the desired
nominal cell-voltage (ex. 19.8V will be 3.3V per cell).
Table1. J3 Pinout
J3 Pin CPIN Input
1 NC
2 NC
3 V–
4 C0/V–
5 C1
6 C2
7 C3
8 C4
9 C5
10 C6
11 NC
12 NC
13 NC
14 NC
15 NC
16 NC
Figure1.
100Ω
DC2026 F01
Resistor Divider String

3
DEMO MANUAL DC2515A
Rev. 0
JUMPERS
USING OTHER SPI MASTER BOARDS
DC2515 SERIAL INTERFACE OPTIONS
The on-board jumpers must be set to match the desired
mode of operation. These jumpers can enable the Dis-
charge Timer and select the serial communication mode
of the battery stack monitor IC.
ISOMD Jumpers JP1, JP2, and JP4
0: Set jumpers to 0 for standard SPI communication to
the IC through the J4 connector.
1: Set jumpers to 1 for isoSPI communication to the IC
through either the J1 or J2 connector.
DTEN Jumper JP3
0: Set jumpers to 0 for Discharge Timer disable.
1: Set jumpers to 1 for Discharge Timer enable.
The DC2515 has several communication options. The
DC2026 Linduino One provides a USB-to-SPI interface,
and is ideal to interface from a PC to any SPI device. In
this case, the DC2026 SPI interface can connect directly
to the DC2515 (see section entitled DC2026 to DC2515
SPI Connection for details). Alternately, the DC2026 SPI
can be translated to isoSPI via the DC1941 (single isoSPI
channel) or DC2792 (dual isoSPI channels) demo boards.
The DC2792 dual master isoSPI demo board can be con-
nected as a typical single-ended isoSPI bus master or to
both ends of a reversible configuration with two isoSPI
bus masters. The DC1941 can be connected as a typical
single-ended isoSPI bus master.
When a different SPI Master microcontroller board is used
instead of the DC2026, more components or equipment
are required to properly interface to the demo boards.
Here are the requirements:
SPI MISO Line
Most SPI Master microcontroller boards will not have a
SPI MISO line pull-up. A 5kΩ pull-up resistor is required
on the SPI MISO line because the battery stack monitor
IC SDO is an open drain NMOS output pin. Otherwise,
the SPI MISO line will be floating where the SPI readback
of each byte will typically appear as no response or all
one’s or 0xFF’s. There are several places where the pull-up
resistor can be installed. On the microcontroller board, a
5kΩ resistor can be added between the microcontroller
SPI MISO line and the microcontroller VCC pin.
isoSPI IC Power
A separate 5V power supply is required when using a
different SPI Master microcontroller board. The DC2026
J1 header provides power for the isoSPI IC through the
14-pin ribbon cable into the DC2792 J1 header or the
DC1941 J2 header. Refer to demo manual DC2792A
or demo manual DC1941D for external power supply
instructions.

4
DEMO MANUAL DC2515A
Rev. 0
DC2026 TO DC2515 SPI CONNECTION
A SPI connection begins with the SPI Master connected to
the first (or “bottom”) DC2515. Additional DC2515 boards
can be daisy-chained onto the isoSPI bus. Communication
begins from the first (or “bottom”) DC2515 then to the
next “upper” DC2515 and, finally, to the last (or “top”)
DC2515.
Figure2 shows the following connections for two boards
on a stack interfaced to a PC:
1. Connect a USB cable from the PC USB port to the
DC2026 J5 connector.
2. Connect the DC2026 to the DC2515 in SPI mode. This
DC2515 is the first (or “bottom”) board of the stack.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the “bottom” DC2515 J4 header.
b. Set JP1, JP2, and JP4 to 0 for SPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
3. Connect or daisy-chain the DC2515 to another
DC2515 in isoSPI mode. This DC2515 is the last
(or “top”) board of a two-board stack. More DC2515
“upper”boards can be daisy-chained together in the
same manner.
a. Connect a RJ45 patch cable from the “bot-
tom” DC2515 J1 isoSPI B RJ45 connector to the
next “upper”or “top” DC2515 J2 isoSPI A RJ45
connector.
b. Set the next “upper”or “top” DC2515 JP1, JP2, and
JP4 to 1 for isoSPI communication.
4. CAUTION! Prevent damage to the DC2515. Refer to
Table1 and confirm that the cell-voltage connections to
thescrew-terminalblockmatchestheDC2515J3pinout.
a. Plug the screw-terminal blocks into the J3 cell-
voltage connectors.
5. Refertothe Software Setup section of thisdemomanual
to properly setup the PC with the Arduino IDE software
to allow communication to the DC2515 boards.
Figure2. DC2026 SPI Connection to the “Bottom” DC2515 in a Two-Board DC2515 Stack
DC2026
DC2515
USB
1
0
1
0
1
0
1
0
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4J5 J1
isoSPI B
J1
J3 DC2515
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
isoSPI B
J1
J3
DC2515 F02

5
DEMO MANUAL DC2515A
Rev. 0
DC2792 TO DC2515 TYPICAL isoSPI CONNECTION
A typical isoSPI connection begins with the isoSPI Master
connected to the first (or “bottom”) DC2515. Additional
DC2515 boards can be daisy-chained onto the isoSPI
bus. Communication begins from the first (or “bottom”)
DC2515 then to the next “upper” DC2515 and, finally, to
the last (or “top”) DC2515.
Figure3 shows the following connections for two boards
on a stack interfaced to a PC:
1. Connect a USB cable from the PC USB port to the
DC2026 J5 connector.
2. Connect the DC2026 to the DC2792 Dual Master isoSPI
demo board.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the DC2792 J1 header.
3. Connect the DC2792 to the DC2515 in isoSPI mode.
This DC2515 is the first (or “bottom”) board of the
stack.
a. Connect a RJ45 patch cable from the DC2792 J2
MAIN RJ45 connector to the “bottom” DC2515 J2
isoSPI A RJ45 connector.
b. Set the “bottom” DC2515 JP1, JP2, and JP4 to 1
for isoSPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
4. Connect or daisy-chain the DC2515 to another DC2515
in isoSPI mode. This DC2515 is the last (or “top”) board
of a two-board stack. More DC2515 “upper” boards can
be daisy-chained together in the same manner.
a. Connect a RJ45 patch cable from the “bot-
tom” DC2515 J1 isoSPI B RJ45 connector to the
next “upper”or “top” DC2515 J2 isoSPI A RJ45
connector.
b. Set the next “upper”or “top” DC2515 JP1, JP2, and
JP4 to 1 for isoSPI communication.
5. CAUTION! Prevent damage to the DC2515. Refer to
Table1 and confirm that the cell-voltage connections to
thescrew-terminalblockmatchestheDC2515J3pinout.
a. Plug the screw-terminal blocks into the J3 cell-
voltage connectors.
6. Refertothe Software Setup section of thisdemomanual
to properly setup the PC with the Arduino IDE software
to allow communication to the DC2515 boards.
Figure3. DC2792 Typical isoSPI Connection to the “Bottom” DC2515 in a Two-Board DC2515 Stack
DC2026
DC2515
USB
1
0
1
0
1
0
1
0
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
J5 J1
DC2792 MAIN
J1
J2
AUX
J3
isoSPI B
J1
J3 DC2515
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
isoSPI B
J1
J3
DC2515 F03

6
DEMO MANUAL DC2515A
Rev. 0
DC2792 TO DC2515 REVERSE isoSPI CONNECTION
A reverse isoSPI connection begins with the isoSPI
Master connected to the last (or “top”) DC2515. Additional
DC2515 boards can be daisy-chained onto the isoSPI bus.
Communication begins from the last (or “top”) DC2515
then to the next “lower” DC2515 and, finally, to the first
(or “bottom”) DC2515.
Figure4 shows the following connections for two boards
on a stack interfaced to a PC:
1. Connect a USB cable from the PC USB port to the
DC2026 J5 connector.
2. Connect the DC2026 to the DC2792 Dual Master isoSPI
demo board.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the DC2792 J1 header.
3. Connect the DC2792 to the DC2515 in isoSPI mode.
This DC2515 is the last (or “top”) board of a two-board
stack.
a. Connect a RJ45 patch cable from the DC2792 J2
MAIN RJ45 connector to the “top” DC2515 J1 iso-
SPI B RJ45 connector.
b. Set the “top” DC2515 JP1, JP2, and JP4 to 1 for
isoSPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
4. Connect or daisy-chain the DC2515 to another DC2515
in isoSPI mode. This DC2515 is the first (or “bottom”)
board of a two-board stack. More DC2515 “lower”
boards can be daisy-chained together in the same
manner.
a. Connect a RJ45 patch cable from the “top” DC2515
J2 isoSPI A RJ45 connector to the next “lower” or
“bottom” DC2515 J1 isoSPI B RJ45 connector.
b. Set the next “lower” or “bottom” DC2515 JP1, JP2,
and JP4 to 1 for isoSPI communication.
5. CAUTION! Prevent damage to the DC2515. Refer to
Table1 and confirm that the cell-voltage connections to
thescrew-terminalblockmatchestheDC2515J3pinout.
a. Plug the screw-terminal blocks into the J3 cell-
voltage connectors.
6. Refertothe Software Setup section of thisdemomanual
to properly setup the PC with the Arduino IDE software
to allow communication to the DC2515 boards.
Figure4. DC2792 Reverse isoSPI Connection to the “Top” DC2515 in a Two-Board DC2515 Stack
DC2026
DC2515
USB
1
0
1
0
1
0
1
0
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
J5 J1
DC2792 MAIN
J1
J2
AUX
J3
isoSPI B
J1
J3 DC2515
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
isoSPI B
J1
J3
DC2515 F04

7
DEMO MANUAL DC2515A
Rev. 0
DC2792 TO DC2515 REDUNDANT isoSPI CONNECTION
A redundant isoSPI connection begins with the primary
(or “main”) isoSPI Master connected to the first (or
“bottom”) DC2515 and has a backup auxiliary (or “aux”)
isoSPI Master connected to the last (or “top”) DC2515.
Additional DC2515 boards can be daisy-chained between
the two isoSPI masters on the isoSPI bus. Primary (or
“main”) communication begins from the first (or “bot-
tom”) DC2515 then to the next “upper” DC2515 and,
finally, to the last (or “top”) DC2515. The backup auxiliary
(or “aux”) communication begins in the reverse direction
to provide coverage when a possible isoSPI daisy-chain
break occurs.
Figure5 shows the following connections for two boards
on a stack interfaced to a PC:
1. Connect a USB cable from the PC USB port to the
DC2026 J5 connector.
2. Connect the DC2026 to the DC2792 Dual Master isoSPI
demo board.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the DC2792 J1 header.
3. Connectthe DC2792 primary(or“main”) isoSPI master
to the first (or “bottom”) DC2515 board of the stack.
a. Connect a RJ45 patch cable from the DC2792 J2
MAIN RJ45 connector to the “bottom” DC2515 J2
isoSPI A RJ45 connector.
b. Set the “bottom” DC2515 JP1, JP2, and JP4 to 1
for isoSPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
4. Connect or daisy-chain the DC2515 to another DC2515
in isoSPI mode. This DC2515 is the last (or “top”) board
of a two-board stack. More DC2515 “upper” boards can
be daisy-chained together in the same manner.
a. Connect a RJ45 patch cable from the “bot-
tom” DC2515 J1 isoSPI B RJ45 connector to the
next “upper”or “top” DC2515 J2 isoSPI A RJ45
connector.
b. Set the next “upper” or “top” DC2515 JP1, JP2, and
JP4 to 1 for isoSPI communication.
5. Connect the DC2792 auxiliary (or “aux”) isoSPI Master
to the last (or “top”) DC2515 board of the stack.
a. Connect a RJ45 patch cable from the DC2792 J3
AUX RJ45 connector to the “top” DC2515 J1 isoSPI
B RJ45 connector.
6. CAUTION! Prevent damage to the DC2515. Refer to
Table1 and confirm that the cell-voltage connections to
thescrew-terminalblockmatchestheDC2515J3pinout.
a. Plug the screw-terminal blocks into the J3 cell-
voltage connectors.
7. Refertothe Software Setup section of thisdemomanual
to properly setup the PC with the Arduino IDE software
to allow communication to the DC2515 boards.
Figure5. DC2792 Redundant isoSPI Connections to the “Bottom” and “Top” DC2515 in a Two-Board DC2515 Stack
DC2026
DC2515
USB
1
0
1
0
1
0
1
0
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
J5 J1
DC2792 MAIN
J1
J2
AUX
J3
isoSPI B
J1
J3 DC2515
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
isoSPI B
J1
J3
DC2515 F05

8
DEMO MANUAL DC2515A
Rev. 0
DC1941 isoSPI MASTER SETTINGS
The DC1941 jumpers must first be properly set to inter-
face between DC2026 and DC2515.
Refertodemo manual DC1941D for jumpersettingdetails.
Figure6 shows the proper board settings.
1. JP2: VCC = DC590.
2. JP3: ENABLE = EN.
3. JP4: SLOW = 0.
4. JP5: MODE = MASTER.
5. JP6: VCCS = VCC.
6. JP7: PHA = 1.
7. JP8: POL = 1.
8. JP9, JP10: VTH = VTH2.
Figure6. DC1941 isoSPI Master Mode Jumper Settings
EN
SLP_EN
VTH2
VTH1
VTH2
VTH1
MASTER
SLAVE
DC590
EXT
VCC
EXT
1
0
1
0
VCC VCCS PHA POL
J2 J1
VCCS GND
GNDVCC
DC1941
JP3
JP10
JP9
JP2
JP6 JP7
JP8
JP4
JP5
SLOW
1
0
DC2515 F06

9
DEMO MANUAL DC2515A
Rev. 0
DC1941 TO DC2515 TYPICAL isoSPI CONNECTION
A typical isoSPI connection begins with the isoSPI master
connected to the first (or “bottom”) DC2515. Additional
DC2515 boards can be daisy-chained onto the isoSPI
bus. Communication begins from the first (or “bottom”)
DC2515 then to the next “upper” DC2515 and, finally, to
the last (or “top”) DC2515.
Figure7 shows the following connections for two boards
on a stack interfaced to a PC:
1. Connect a USB cable from the PC USB port to the
DC2026 J5 connector.
2. Connectthe DC2026 tothe DC1941 isoSPI demo board.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the DC1941 J2 header.
3. Refer to the DC1941 isoSPI Master Settings section of
this demo manual to properly setup the DC1941.
4. Connect the DC1941 to the DC2515 in isoSPI mode.
This DC2515 is the first (or “bottom”) board of the
stack.
a. Connect a RJ45 patch cable from the DC1941 J1
RJ45 connector to the “bottom” DC2515 J2 isoSPI
A RJ45 connector.
b. Set the “bottom” DC2515 JP1, JP2, and JP4 to 1
for isoSPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
5. Connect or daisy-chain the DC2515 to another DC2515
in isoSPI mode. This DC2515 is the last (or “top”) board
of a two-board stack. More DC2515 “upper” boards can
be daisy-chained together in the same manner.
a. Connect a RJ45 patch cable from the “bot-
tom” DC2515 J1 isoSPI B RJ45 connector to the
next “upper”or “top” DC2515 J2 isoSPI A RJ45
connector.
b. Set the next “upper”or “top” DC2515 JP1, JP2, and
JP4 to 1 for isoSPI communication.
6. CAUTION! Prevent damage to the DC2515. Refer to
Table1 and confirm that the cell-voltage connections to
thescrew-terminalblockmatchestheDC2515J3pinout.
a. Plug the screw-terminal blocks into the J3 cell-
voltage connectors.
7. Refertothe Software Setup section of thisdemomanual
to properly setup the PC with the Arduino IDE software
to allow communication to the DC2515 boards.
Figure7. DC1941 Typical isoSPI Connection to the “Bottom” DC2515 in a Two-Board DC2515 Stack
DC2026
DC2515
USB
1
0
1
0
1
0
1
0
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
J5 J1
DC1941
J2 J1
isoSPI B
J1
J3 DC2515
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
isoSPI B
J1
J3
DC2515 F07

10
DEMO MANUAL DC2515A
Rev. 0
DC1941 TO DC2515 REVERSE isoSPI CONNECTION
A reverse isoSPI connection begins with the isoSPI mas-
ter connected to the last (or “top”) DC2515. Additional
DC2515 boards can be daisy-chained onto the isoSPI bus.
Communication begins from the last (or “top”) DC2515
then to the next “lower” DC2515 and, finally, to the first
(or “bottom”) DC2515.
Figure8 shows the following connections for two boards
on a stack interfaced to a PC:
1. Connect a USB cable from the PC USB port to the
DC2026 J5 connector.
2. Connectthe DC2026 tothe DC1941 isoSPI demo board.
a. Connect a 14-pin ribbon cable from the DC2026 J1
header to the DC1941 J2 header.
3. Refer to the DC1941 isoSPI Master Settings section of
this demo manual to properly setup the DC1941.
4. Connect the DC1941 to the DC2515 in isoSPI mode.
This DC2515 is the last (or “top”) board of a two-board
stack.
a. Connect a RJ45 patch cable from the DC1941 J1
RJ45 connector to the “top” DC2515 J1 isoSPI B
RJ45 connector.
b. Set the “top” DC2515 JP1, JP2, and JP4 to 1 for
isoSPI communication.
c. JP3 can be 0 or 1 depending if the Discharge Timer
function is being used.
5. Connect or daisy-chain the DC2515 to another DC2515
in isoSPI mode. This DC2515 is the first (or “bottom”)
board of a two-board stack. More DC2515 “lower”
boards can be daisy-chained together in the same
manner.
a. Connect a RJ45 patch cable from the “top” DC2515
J2 isoSPI A RJ45 connector to the next “lower” or
“bottom” DC2515 J1 isoSPI B RJ45 connector.
b. Set the next “lower” or “bottom” DC2515 JP1, JP2,
and JP4 to 1 for isoSPI communication.
6. CAUTION! Prevent damage to the DC2515. Refer to
Table1 and confirm that the cell-voltage connections to
thescrew-terminalblockmatches
theDC2515J3pinout.
a. Plug the screw-terminal blocks into the J3 cell-
voltage connectors.
7. Refertothe Software Setup section of thisdemomanual
to properly setup the PC with the Arduino IDE software
to allow communication to the DC2515 boards.
Figure8. DC1941 Reverse isoSPI Connection to the “Top” DC2515 in a Two-Board DC2515 Stack
DC2026
DC2515
USB
1
0
1
0
1
0
1
0
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
J5 J1
DC1941
J2 J1
isoSPI B
J1
J3 DC2515
DTEN
ISOMD
JP4
JP3
JP2 JP1
isoSPI A
J2J4
isoSPI B
J1
J3
DC2515 F08