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Analog Interface
2
Analog Interface
For maximum flexibility, the ADS1274EVM is designed for easy interfacing to multiple analog sources.
Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin,
dual-row, header/socket combination at J9. This header/socket provides access to the analog input pins of
the ADS1274. Consult Samtec at
connector options. These signals can also be connected to the terminal block J7.
Most of the pins on J7 and J9 are directly connected, with no filtering or protection. Use appropriate
caution when handling these pins.
Pin Number
J9.1, J7-2
J9.2, J7-3
J9.3, J7-4
J9.4, J7-5
J9.5, J7-6
J9.6, J7-7
J9.7, J7-8
J9.8, J7-9
J9.18
J9.20
J9.10-16 (even)
J9.15
J9.9-19 (odd), J7-1
3
Digital Interface
3.1
Serial Data Interface
The ADS1274EVM is designed to easily interface with multiple control platforms. Samtec part numbers
SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket
combination at J5. This header/socket provides access to the digital control and serial data pins of the
ADC. Consult Samtec at
connector options.
All logic levels on J5 are 3.3V CMOS, except for the I
Table 2
describes the J5 serial interface pins.
Pin No.
J5.1
J5.2
J5.3
J5.4
J5.5
J5.6
J5.7
J5.8
4
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and ADS1274EVM-PDK
http://www.samtec.com
Table 1
summarizes the pinouts for analog interfaces J9 and J7.
Table 1. J9/J7:Analog Interface Pinout
Signal
A1N
A1P
A2N
A2P
A3N
A3P
A4N
A4P
EXTREFN
EXTREFP
Unused
Unused
AGND
http://www.samtec.com
Table 2. J5: Serial Interface Pins
Pin Name
Signal Name
CNTL
SYNC
GPIO0
MODE0
CLKX
SCLK
DGND
DGND
CLKR
CLKR
GPIO1
MODE1
FSX
/DRDY/FSYNC
GPIO2
FORMAT0
or call 1-800-SAMTEC-9 for a variety of mating
Description
AINN1, ADS1274
AINP1, ADS1274
AINN2, ADS1274
AINP2, ADS1274
AINN3, ADS1274
AINP3, ADS1274
AINN4, ADS1274
AINP4, ADS1274
External Reference source input
(– side of differential input)
External Reference source input
(+ side of differential input)
Analog ground connections (except J1.15)
or call 1-800-SAMTEC-9 for a variety of mating
2
C™ pins. These pins conform to 3.3V I
I/O Type
Pullup
In
High
In
High
In
None
In/Out
None
Out
None
In
High
In/Out
Low
In
High
SBAU134A – August 2008 – Revised May 2009
www.ti.com
2
C rules.
Function
ADS1274 SPI™
clock
Digital Ground
SCLK clock
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