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dc1338af
DEMO MANUAL DC1338A
DESCRIPTION
LTC2990 I2C Temperature
Voltage and Current Monitor
Demonstration circuit 1338A features the LTC
®
2990, a
high performance temperature, voltage and current moni-
tor that uses I2C for communication. It offers submillivolt
resolution and 1% current and 1°C temperature measure-
ment accuracy.
DC1338A is a member of Linear Technology’s QuikEval™
family of demonstration boards. It is designed to allow easy
evaluation of the LTC2990 and may be connected directly
to the target application’s analog signals while using the 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.
Figure 1. Proper Measurement Equipment Setup.
Power Is Obtained from DC590
DC590 USB Serial Controller board and supplied software
to measure performance. Exposed ground planes allow
proper grounding to prototype circuitry. After evaluating
with Linear Technology’s software, the I2C lines 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
RIBBON CABLE TO DC590
CONTROLLER
INPUTS
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DEMO MANUAL DC1338A
QUICK START PROCEDURE
Connect DC1338A 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 evalu-
ation software supplied with DC590 or downloaded from
http://www.linear.com/software. The correct program
Figure 2. Software Screenshot
will be loaded automatically. Click the COLLECT button to
start reading the input voltage (COLLECT button becomes
PAUSE after collection has been initiated). Details on
software features are documented in the control panel’s
help menu.
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DEMO MANUAL DC1338A
HARDWARE SETUP
Connection to DC590 Serial Controller
J1 is the power and digital interface connector. Connect
to DC590 serial controller with supplied 14 conductor
ribbon cable.
Jumper Settings
V1, V2, V3, V4: These jumpers can be toggled between
VOLT and TEMP. VOLT connects the corresponding input
on the LTC2990 with the corresponding turret for an exter-
nal input. TEMP connects the corresponding input to the
onboard FMMT3904 (V3 and V4) or the FMMT3906 (V1
and V2). Please note that the jumpers should be moved in
pairs, V1 and V2 should both be connected either to VOLT
or TEMP and V3 and V4 should also be both connected
to either VOLT or TEMP. Once set, the proper selection
should also be made inside the QuikEval software in the
mode box to reflect any changes made.
VCC: EXT allows the LTC2990 to be powered from an ex-
ternal supply of 2.9V to 5.5V, connected to the VCC EXT
and GND turrets. If set to INT, the LTC2990 is powered
by the attached DC590B.
ADR0, ADR1: These jumpers are used to select the I2C
address for the LTC2990. When used with QuikEval, the
correct address should also be selected from within the
software.
Analog Connections
Analog signal connections are made at turrets V1, V2, V3
and V4. Single-ended input range is 0 to VCC, differential
is ±300mV with a common mode range of 0 to VCC. When
connecting the board to an existing circuit the exposed
ground planes along the edges of the board may be used
to form a solid connection between grounds.
GND (2 locations): This turret is connected directly to the
internal ground planes.
VCC EXT: This turret allows the user to provide VCC to the
LTC2990. (2.9V to 5.5V)
V1, V2, V3, V4: These turrets are used to provide input
voltage to the monitor when the corresponding jumpers
are set to the VOLT position.
V+: Unregulated 10V coming from the DC590B. Turret
provided for testing purposes only. Presence of 10V
indicates proper connection of DC590B.
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DEMO MANUAL DC1338A
PARTS LIST
ITEM QUANTITY REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER’S PART NUMBER
Required Circuit Components:
1 2 C2, C1 CAP, X7R 0.1µF 25V 10% AVX, 06033C104KAT2A
2 2 C4, C3 CAP, NPO 470pF 25V 10% AVX, 06033A471KAT2A
3 8 E1, E2, E3, E4, E5, E6, E7, E8 TURRET, TESTPOINT MILL MAX, 2308-2-00-80-00-00-07-0
4 7 JP1, JP2, JP3, JP4, JP5,
JP6, JP7
HEADERS, 3 PINS 2mm CTRS SAMTEC, TMM-103-02-L-S
5 1 J1 HEADERS, 14PIN 2mm CTRS MOLEX, 87831-1420
6 1 Q1 TRANSISTOR, PNP ZETEX, FMMT3906
7 1 Q2 TRANSISTOR, NPN ZETEX, FMMT3904
8 2 R1, R2 RES, CHIP 4.99k 0.06W 1% VISHAY, CRCW04024K99FKED
9 1 U1 IC, TEMP, VOLT, CURR MONITOR LINEAR TECHNOLOGY, LTC2990CMS
10 1 U2 IC, SERIAL EEPROM MICROCHIP, 24LC025-I/ST
11 7 XJP1, XJP2 ,XJP3, XJP4,
XJP5 TO XJP7
SHUNT, 2mm CTRS SAMTEC, 2SN-BK-G
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DEMO MANUAL DC1338A
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 represent a-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
+5V
VUNREG
SCK/SCL
EEGND
EESDA
EESCL
EEVCC
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
TECHNOLOGY
Leo C.
TECHNOLOGY
Leo C.
TECHNOLOGY
Leo C.
E7
V4
E7
V4 C2
0.1uF
C2
0.1uF
TP2
SDA
TP2
SDA
JP4
1
0
ADR0
JP4
1
0
ADR0
1
3
2
Q1
FMMT3906
Q1
FMMT3906
E1
VCC
EXT
E1
VCC
EXT
JP7
TEMP
VOLT
V4
JP7
TEMP
VOLT
V4
1
3
2
TP1
SCL
TP1
SCL
J1J1
1
3
2
4
5
6
7
8
9
10
11
13
12
14
R1
4.99K
1%
R1
4.99K
1%
E6
V3
E6
V3
E8
GND
E8
GND
JP2
EXT
INT
VCC
JP2
EXT
INT
VCC
1
3
2
JP6
TEMP
VOLT
V3
JP6
TEMP
VOLT
V3
1
3
2
C4
470pF
C4
470pF
E3
V+
E3
V+
E4
V1
E4
V1
V3
3
SDA 6
V2
2
ADR0 8
V4
4
SCL 7
V1
1
VCC 10
ADR1 9
GND 5
E2
GND
E2
GND
Q2
FMMT3904
Q2
FMMT3904
JP5
TEMP
VOLT
V2
JP5
TEMP
VOLT
V2
1
3
2
JP1
1
0
ADR1
JP1
1
0
ADR1
1
3
2
C3
470pF
C3
470pF
E5
V2
E5
V2
U2
24LC025-I/ST
U2
24LC025-I/ST
A0 1
A1 2
A2 3
VSS 4
VCC
8
WP
7
SCL
6
SDA
5
R2
4.99K
1%
R2
4.99K
1%
JP3
TEMP
VOLT
V1
JP3
TEMP
VOLT
V1
1
3
2
C1
0.1uF
C1
0.1uF
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dc1338af
DEMO MANUAL DC1338A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2010
LT 1110 • PRINTED IN USA
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 applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
