DC1096B - Demo Manual

DEMO MANUAL DC1096B
LTC2642A-16
16-Bit Unbuffered VOUT DAC
DESCRIPTION
Demonstration circuit 1096B features the LTC®2642A-16,
a 16-bit voltage output DAC. The LTC2642A-16 output is
unbuffered, allowing it to swing all the way to the supply rails.
DC1096B is a member of Linear Technology’s QuikEval™
family of demonstration boards. It is designed to allow
easy evaluation of the LTC2642A-16 and may be connected
directly to the target application’s analog signals while
using the DC590 USB serial controller board and supplied
software to measure performance. The exposed ground
planes allow proper grounding to prototype circuitry.
After evaluating with Linear Technology’s software, the
digital signals can be connected to the end application’s
processor/controller for development of the serial interface.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1096
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
DAC1 OUTPUT–
LTC6078 BUFFER
DAC2 OUTPUT–
LT1678 AMP
DAC3 OUTPUT–
OPTIONAL AMP
DAC3 UNBUFFERED
OUTPUT
REFERENCE
VOLTAGE
AMPLIFIER
SUPPLY
+–
+–
DC1096b F01
Figure 1. Connection Diagram
dc1096bfa
1
DEMO MANUAL DC1096B
QUICK START PROCEDURE
Connect DC1096B to a DC590 USB serial controller using
the supplied 14-conductor ribbon cable. Connect DC590
to host PC with a standard USB A/B cable. Run the evaluation software supplied with DC590 or downloaded from
www.linear.com/software. The correct program will be
loaded automatically. By default, the control program will
load a DC value into the LTC2642A-16. The value may be
changed by typing hexadecimal counts (0000 - FFFF),
or decimal counts (0 – 65535), or the voltage desired
depending on the option selected. Setting the software
to unipolar or bipolar will not set the hardware to bipolar
mode. The jumpers need to be placed in their proper
positions in order to accomplish this.
The other option is a square wave output. The frequency
of the square wave is not tightly controlled; it is intended
to allow measurement of settling time and glitch impulse.
Features may be periodically added to the software, see
the software’s help menu for the latest information.
dc1096bfa
2
DEMO MANUAL DC1096B
HARDWARE SETUP
POWER CONNECTIONS
CONNECTION TO DC590 SERIAL CONTROLLER
A low noise, bipolar power supply can be connected to
the AMPV+, AMPV–, and GND turret posts.
J1 is the power and digital interface connector. Connect
to DC590 serial controller with supplied 14-conductor
ribbon cable.
If an external supply is connected, the respective jumpers
must be placed in the EXT position.
This provides power to the LT1678 amplifier and optional
amplifiers U5, U8, or U9. The LT1678 will work with supplies as high as ±15V, consult the data sheet for supply
limitations on any optional amplifiers that are installed.
JUMPERS
JP1: Select the source for REF+, either 2.5V or 5V from
the onboard LT1019 or LT1236 reference (default – 5V)
JP2: Select the VCC source, either provided by a connected
DC590 or an external source.
JP3: Sets DAC2 to either unipolar or bipolar mode. In bipolar
mode, set JP6 and JP7 to EXT and apply an appropriate
supply to AMP V+, AMP V–, and GND turret posts.
JP4: Sets DAC3 to either unipolar or bipolar mode. In bipolar
mode, set JP6 and JP7 to EXT and apply an appropriate
supply to AMP V+, AMP V–, and GND turret posts.
OUTPUT CONNECTIONS
E3 is the output from U1, which is buffered by an LTC6078
op amp.
E4 is the output from U2, which is buffered by an LT1678
op amp. JP3 allows this DAC to be configured for either
unipolar or bipolar operation.
E5 is the buffered output of U4, if an optional amplifier is
installed. There are three standard op amp footprints that
allow other amplifiers to be evaluated.
E10 is directly connected to U4’s output.
REFERENCE CONNECTIONS
JP1 selects between the onboard 5V reference and the
onboard 2.5V reference. The reference voltage can be
monitored on E9, or an external reference may be applied
to E9 if JP1 is removed.
JP6: Sets V+ for the amplifiers to either external (AMP V+)
or VCC.
JP7: Sets V– for the amplifiers to either external (AMP V–)
or ground.
dc1096bfa
3
DEMO MANUAL DC1096B
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
1
12
C1, C3, C6, C13-C21
CAP, 0603 0.1µF 10% 25V X7R
AVX 06033C104KAT
2
2
C4, C5
CAP, 0805 10µF 20% 10V X5R
TDK C2012X5R1A106M125AB
3
1
C8
CAP, 0402 0.1µF 20% 16V X7R
TDK C1005X7R1C104M050BC
4
2
C10, C9
CAP, 0603 4.7µF 20% 6.3V X5R
TDK C1608X5R0J475M080AB
5
1
C11
CAP, 0402 33pF 10% 50V NP0
AVX, 04025A330KAT2A
6
0
C12
CAP, 0402 OPTION
TDK C1005X7R1E103K050BB
7
13
E1-E10, E12-E14
TURRET
MILL-MAX 2308-2-00-80-00-00-07-0
8
6
JP1-JP4, JP6, JP7
HEADER, 3PIN 2mm
SULLINS, NRPN031PAEN-RC
9
1
JP5
HEADER, 2X4 0.100 CENTERS
WÜRTH ELEKTRONIK, 61300821121
10
1
J1
HEADER, 2X7 2mm
MOLEX 87831-1420
11
1
R1
RES, 0402 10k 5% 1/16W
VISHAY CRCW040210K0JNED
12
2
R3, R2
RES, 0402 0Ω JUMPER
VISHAY CRCW04020000Z0ED
13
3
R4, R5, R6
RES, 0402 4.99k 1% 1/16W
VISHAY CRCW04024K99FKED
14
3
R7, R8, R9
RES, 0603 0Ω JUMPER
VISHAY CRCW0603000Z0EA
15
3
U1, U2, U4
IC, LTC2642ACDD-16
LINEAR TECH. LTC2642ACDD-16
16
1
U3
IC, 24LC025-I/ST
MICROCHIP TECH. 24LC025-I/ST
17
0
U5, U8, U9
IC, OPTION
OPTION
18
1
U6
IC, LTC6078ACMS8
LINEAR TECH LTC6078ACMS8
19
1
U7
IC, LT1678CS8#PBF
LINEAR TECH LT1678CS8#PBF
20
1
U10
IC, VOLTAGE REG 5V
LINEAR TECH. LT1236CCS8-5#PBF
21
1
U11
IC, VOLTAGE REG 2.5V
LINEAR TECH. LT1019CS8-2.5#PBF
22
6
JP1-JP4, JP6, JP7
SHUNT
SAMTEC 2SN-BK-G
23
1
JP5
SHUNT, 0.100
WÜRTH ELEKTRONIK, 60900213421
dc1096bfa
4
A
B
C
J1
GND
5 +
6 -
AMP V-
SCK/SCL
CS
5V
VUNREG
10uF
C4
V+
E14
E13
E12
V-
14
12
9
10
11
5
7
4
6
2
1
7
5
2
JP7
2
JP6
VDD
U5B
OPT S8
GND
EXT
EXT
VCC
NC
EEGND
EESDA
EEVCC
EESCL
MISO
MOSI/SDA
E8
AMP V+
GND
E7
GND
TRIM
OUT
5
6
OUT
U3
5
5
6
0.1uF
C19
7
V-
C16
0.1uF
1
2
3
7
6
V+
0.1uF
C20
V+
A0
A1
A2
WP
SCL
4.7uF
C10
2.5V
5V
4.7uF VREF
C9
C15
0.1uF
U6B
LTC6078ACMS8
VDD
0.1uF
C14
0.1uF
C18
C13
0.1uF
0.1uF
5 +
6 -
SDA
24LC025-I/ST
1%
R6
4.99K
TRIM
C17
IN
U11 LT1019CS8-2.5
IN
0.1uF
C8
2
2
U10 LT1236CCS8-5
GND
4
GND
3
5 +
6 -
V-
1%
R4
4.99K
7
4
E9
1%
8
7
V+
6
5
SPI BUS
4
2
3
JP5
VREF
1
R5
4.99K
2 VREF
JP1
4
U7B
LT1678CS8
1
5 +
6 -
V-
7
U8B
OPT S08
0.1uF
NCLR
LD
SDI
SCK
5
2
4
3
0.1uF
NCLR
LD
SDI
SCK
C3
NCLR
LD
SDI
SCK
0.1uF
3
VDD
VDD
7
6
7
6
OPT
C12
7
6
VREF
0
3
2
JP3
2
2
2
SCALE = NONE
MARK T.
KIM T.
APPROVALS
R3
UNI
BIP
JP4
VREF
R2
0
UNI
BIP
VREF
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
INV
VOUT
R9 0
INV
VOUT
R8 0
INV
C11
33pF
50V
R7 0
VOUT
JP2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
U4
LTC2642ACDD-16
5
2
4
3
C6
VCC
INT EXT
10uF
U1
LTC2642ACDD-16
5
2
4
3
C1
C5
1
U2
LTC2642ACDD-16
R1
10K
VDD
3
2
9
V+
GND
13
GND
3
8
VCC
1
REF
VDD
GND
REF
3 +
2 -
1
REV
V+
3 +
2 -
V+
V-
3 +
2 -
VV+
3 +
4 -
VV+
3 +
2 -
DATE:
N/A
SIZE
GND
DAC3 BUF
DAC3 DIRECT
DAC2
DAC1
GND
VDD
DATE
01-09-15
LTC2642ACDD-16
1
DEMO CIRCUIT 1096B
SHEET
1
OF
1
1
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
E6
E5
E10
E4
E3
E2
E1
MARK T.
APPROVED
16-BIT VOUT DAC
TECHNOLOGY
Friday, January 09, 2015
IC NO.
TITLE: SCHEMATIC
1
U5A
OPT S8
1
U9
OPT SOT23-5
1
U8A
OPT S08
U7A
LT1678CS8
1
V-
1
DESCRIPTION
1
REVISION HISTORY
REBUILD WITH CHANGE
U6A
LTC6078ACMS8
C21 0.1uF
__
ECO
8
4
D
1
3
3
1
8
8
4
11
GND
4
11
11
9
9
8
RFB
10
1
VDD
GND
10
RFB
8
1
REF
VDD
GND
8
RFB
10
3
1
3
1
8
4
8
4
5
2
8
4
8
4
8
4
8
4
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
4
5
A
B
C
D
DEMO MANUAL DC1096B
SCHEMATIC DIAGRAM
dc1096bfa
5
DEMO MANUAL DC1096B
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) 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 LTC 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 LTC 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. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC 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 LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc1096bfa
6
Linear Technology Corporation
LT 0215 REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2012
Similar pages