Linear Technology DC1546A Quick setup guide

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DC1546Af
DEMO MANUAL DC1546A
Description
LTC2754-16
Quad 16-Bit SoftSpan
IOUT DAC
Demonstration circuit 1546A features the LTC2754-16
dual 16-bit SoftSpan™ IOUT DAC. This device features
six output ranges: 0V to 5V, 0V to 10V, ±5V, ±10V, ±2.5V,
and –2.5V to 7.5V. The DAC has offset adjustment and
gain-adjustment pins to allow optimization of transient
response.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
QuikEval and SoftSpan are a trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
BoarD photo
Design files for this circuit board are available at
http://www.linear.com/demo
Figure 1. DC1546A Connection Diagram
DAC
CONNECTIONS
ANALOG POWER SUPPLY
(NORMALLY ±15V)
RIBBON CABLE
TO DC590
CONTROLLER
dc1546a F01
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DC1546Af
DEMO MANUAL DC1546A
Quick start proceDure
1. Connect a clean ±15V power supply to the AMPV+and
AMPV–turret posts at the bottom of the DC1546A
board.
2. Connect J1 to a DC590 USB serial controller using
the supplied 14-conductor ribbon cable.
3. Connect the DC590 to a host PC with a standard USB
A/B cable.
4. Run the QuikEval™ evaluation software supplied with
the DC590 or download it from www.linear.com/
software. The correct control panel will be loaded
automatically.
The software automatically sets the LTC2754-16 outputs
according to the entries in the control panel. A square
wave option is available to test settling time. The MSPAN
jumper should be low if software span control is desired.
Additional software documentation may be available from
the Help menu item, as features may be added periodically.
Figure 2. QuikEval Software Screenshot
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DC1546Af
DEMO MANUAL DC1546A
harDware setup
JUMPERS
MSPAN: Manual Span Control Pin. MSPAN is used to
configure the LTC2754-16 for operation in a single, fixed
output range. If MSPAN is high it will be configured for
single span use. If MSPAN is low it will be set through the
QuikEval software. The default position is 0 (low).
S0, S1, S2: Used to set the fixed output range if MSPAN
is high. Default is all jumpers removed, allowing software
span control.
S2 S1 S0 SPAN
0 0 0 Unipolar 0V to 5V
0 0 1 Unipolar 0V to 10V
0 1 0 Bipolar –5V to 5V
0 1 1 Bipolar –10V to 10V
1 0 0 Bipolar –2.5V to 2.5V
1 0 1 Bipolar –2.5V to 7.5V
Codes not shown are reserved and should not be used.
VREF: Voltage reference selection for the DAC, either 5V
for the onboard LT1236 reference or EXT if an external
reference source is connected to the VREF turret post.
VOSA, VOSB, VOSC,VOSD: Offset adjustment selection
for DACA, DACB, DACC, DACD. If no offset adjustment is
required, select GND. Selecting EXT connects the offset
pin to the turret allowing external adjustment of offset.
REFADJA, REFADJB, REFADJC, REFADJD:Gain-
adjustment selection for each associated DAC. If no gain-
adjustment is required, select GND. Selecting EXT
connects the gain pin to the turret allowing external
adjustment of gain.
VCC: Select source for 5V VCC supply. Set to 5V for sup-
ply by onboard LT1236 reference (recommended). Set to
REG to be supplied by regulated supply from the DC590
controller and remove the jumper to supply externally.
ANALOG CONNECTIONS
OUTA, OUTB, OUTC, OUTD: DAC Voltage Outputs.
VREF: DAC Reference Voltage. If the onboard LT1236
references are selected, the voltage may be measured at
these points. If a remote reference is selected, then an
external reference must be applied to these points.
VOSA, VOSB, VOSC, VOSD: DAC Offset Adjust Input. Use
only if the VOSA/VOSB/VOSC/VOSD jumper is set to EXT.
Nominal input range is ±5V.
REFADJA, REFADJB, REFADJC, REFADJD: Gain-adjust
input for each associated DAC. This control input can be
usedto nullgain erroror tocompensate forreference errors.
Only used if the associated REFADJ jumper is set to EXT.
DIGITAL CONNECTIONS (TURRET POSTS)
CLR:AsynchronousClearPin. Pulled highthrough a10kon
the board but can be driven low to clear all DAC registers.
RFLAG: Reset Flag Pin. Active low output.
LDAC:Asynchronous DACLoad Input. Pulled highthrough
a10k on the board, but can be driven low to update all
DAC registers
GROUNDING AND POWER CONNECTIONS
Analog Power: The 15V, –15V and GND turret posts are
the analog supplies for the internal DAC amplifiers. These
should be connected to a well regulated, low noise power
supply.
VCC: Connection to VCC. See the schematic and descrip-
tion for the VCC jumper.
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DC1546Af
DEMO MANUAL DC1546A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC1546A Required Circuit Components
1 4 C7, C14, C20, C21 CAP., X7R, 150pF, 50V, 10%, 0603 AVX, 06035C151KAT2A
2 4 C16, C17, C18, C19 CAP., COG, 27pF, 50V, 10%, 0603 AVX, 06035A270KAT2A
3 2 C15, C22 CAP., X7R, 0.1µF, 25V, 20%, 0603 TDK, C1608X7R1E104M
4 10 C1-C6, C8, C9-C13 CAP., X5R, 0.1µF, 50V, 20%, 0805 TDK, C2012X7R1H104M
5 4 C1, C8, C23, C24 CAP., X5R, 10µF, 16V, 20%, 1206 TDK, C3216X5R1C106M
6 0 C7, C14, C16-C21 OPT.
7 3 D1, D2, D4 DIODE, SCHOTTKY, SOT23 DIODES INC., BAT54C-7-F
8 1 D3 LED, SMT GREEN PANASONIC, LN1351C-(TR)
9 27 E1-E27 TESTPOINT, TURRET, 0.064" MILL-MAX, 2308-2
10 0 TP1-TP6 OPT.
11 9 JP1-JP7, JP10, JP13 JMP, 3-PIN, 1 ROW, 0.079" SAMTEC, TMM-103-02-L-S
12 4 JP8, JP9, JP11, JP12 JMP, 2×3, 0.079" SAMTEC, TMM-103-02-L-D
13 17 JP1-JP7, JP10, JP13, SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G
(JP8, JP9, JP11, JP12 = 2 EA.)
14 1 J1 HEADER, 2×7PIN, 0.079" MOLEX, 87831-1420 (PBF)
15 3 R4-R6 RES., CHIP, 4.99k, 1/16W, 1%, 0603 VISHAY, CRCW06034K99FKED
16 3 R1-R3 RES., CHIP ,10k, 1/16W, 5%, 0603 VISHAY, CRCW060310K0FKED
17 1 U1 I.C., LTC2754AIUKG-16, QFN52UKG LINEAR TECHNOLOGY, LTC2754AIUKG-16
18 4 U2-U5 I.C., LT1469CS8, SO8 LINEAR TECHNOLOGY, LT1469CS8
19 1 U7 I.C., LT1236ACS8-5, SO8 LINEAR TECHNOLOGY, LT1236ACS8-5
20 1 U6 I.C., SERIAL EEPROM, TSSOP8 MICROCHIP, 24LC025-I /ST
21 4 FOR 4 CORNERS STAND-OFF, NYLON (SNAP-ON), 0.625" TALL KEYSTONE, 8834
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DC1546Af
DEMO MANUAL DC1546A
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.
Figure 3. LTC2754-16 Schematic Diagram
schematic Diagram
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
A A B B C C D D
NOTES:
LTC2754AIUKG-16,
16-Bit Quad Serial Precision
Verify Proper And Reliable Operation In The Actual
Performance Or Reliability. Contact Linear Technology
Circuit Board Layout May Significantly Affect Circuit Circuit That Meets Customer-Supplied Specifications;
Application. Component Substitution And Printed
Linear Technology Has Made A Best Effort To Design A
This Circuit Is Proprietary To Linear Technology And
However, It Remains The Customer's Responsibility To
Supplied For Use With Linear Technology Parts.
Applications Engineering For Assistance.
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
Customer Notice
EXT.
GND GND
GND EXT. EXT. GND EXT. EXT. GND GND
SoftSpan Iout DAC
SCK SDOCS SDI
WP VSS
VCC
EXT. 5V
REFADJD
REFADJC
REFADJB
REFADJA
VOSADJD
VOSADJC
VOSADJB
VOSADJA
EXT. EXT. EXT.
GND GND
REF2
REF1
REF3
REF4
S1
S2
M-SPAN
S0
5V EXT.
5V EXT.
1 0 1
0
Demo Circuit 1546A
A
Linear Technology Corporation 1630 McCarthy Blvd.
Milpitas, CA. 95035
Phone [phone]
Fax [phone] www.linear.com
1 1Thursday, June 04, 2009
Title
Size Document Number Rev.
Date: Sheet of
VOSADJA
VOSADJB
VOSADJC
VOSADJD
REF1
M-SPAN S2 S1 S0 REFADJA REFADJB REFADJC REFADJD
S1
S2 S0 M-SPAN
VOSADJA
VOSADJB
VOSADJC
VOSADJD
REFADJA REFADJD
REFADJB REFADJC
REF1 REF2 REF3
REF4
REF4
REF2 REF3
V+ V+
V+
V+
V- V-
V-
V-
VCC VCC
VCC
V+ V-
VCC
V+
VCC
VCC VCC
E14
GND
- +
U5A LT1469CS8
1
2 3
4 8
R5 4.99K
- +
U2A LT1469CS8
1
2 3
4 8
C2 0.1uF
50V
JP10
1 2 3
JP4
1 2 3
E10
REFADJA
E12
OUTC
C18 27pF
E15
OUTD
E17
GND
C9 0.1uF
50V
E8
LDAC
Exposed Pad, Solder Side
U1
LTC2754AIUKG-16
30 31
20
28
12
1
5 6 7 8
36 32 35 34 33
40
27
14
4
11
37
53
9
26
13
15
25
24
23
16
17
18
19 29 22 38 45 3 48 47 46 21
39
41
2
52
42
43
44
51
50
49
10
CLR RFLAG
VOSADJD
RINC
IOUT2D
REFADJA
CS SDI SCK SRO LDAC M-SPAN S2 S1 S0
REFADJB
REFADJC
REFADJD
GND
GND
GND
GND
GND
RCOMC
RIND
RCOMD
REFC
ROFSC
RFBC
REFD
ROFSD
RFBD
IOUT1D IOUT2C IOUT1C
IOUT2B IOUT1B IOUT2A IOUT1A
VOSADJA
VOSADJB
VOSADJC
RINB
RCOMB
RINA
RCOMA
REFB
ROFSB
RFBB
REFA
ROFSA
RFBA
VDD
JP7
1 2 3
E22
VOSADJC
D1
BAT54C
1
3
2
R4 4.99K
JP1
1 2 3
C4 0.1uF
50V
E13
REFADJB
JP11
12 3 56
4
TP3
C21 150pF
C23 10uF
16V
C10 0.1uF
50V
R2
10K
TP6
E19
VOSADJA
E9
OUTB
- +
U4B LT1469CS8
7
6 5
E1
AMP V+
C15 0.1uF
C20 150pF
JP12
12 3 56
4
E16
REFADJC
JP5
1 2 3
TP2
C11 0.1uF
50V
C1 10uF
16V
U7
LT1236ACS8-5
2
4
6
VIN
GND VOUT
E2
GND
C17 27pF C19 27pF
R1
10K
- +
U3B LT1469CS8
7
6 5
JP2
1 2 3
JP9
12 3 56
4
- +
U4A
LT1469CS8
1
2 3
4 8
E26
REF4
E18
REFADJD
C14 150pF
E3
AMP V-
E6
RFLAG
D4 BAT54C
1
3
2
D3 LED
GREEN
2 1
C12 0.1uF
50V
TP4TP1
R3
10K
E7
GND
E4
CLR
C5 0.1uF
50V
C7 150pF
C24 10uF
16V
C13 0.1uF
50V
JP8
12 3 56
4
J1
HD2X7
1 6
3
4 5 2 7
8
9 10 11 12
13
14
V+
CS
GND
SCK/SCL
MISO
5V
SDA/MOSI
GND
EESDA
EEVCC
EESCL
EEGND
GND
NC
E24
REF3
JP6
1 2 3
C8 10uF
16V
E5
OUTA
JP3
1 2 3
C6 0.1uF
50V
JP13
1 2 3
E20
VOSADJB
E11
GND
- +
U5B LT1469CS8
7
6 5
- +
U3A LT1469CS8
1
2 3
4 8
C22 0.1uF
E23
REF1
C16 27pF
U6
24LC025
1
6 3
45 27
8A0
SCL A2
VSSSDA
A1WP
VCC
- +
U2B
LT1469CS8
7
6 5
R6 4.99K
E25
VOSADJD
C3 0.1uF
50V
E21
REF2
E27
VCC
D2
BAT54C
1
3
2
TP5
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DC1546Af
DEMO MANUAL DC1546A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
LT 0513 • 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
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