Datasheet

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2 Analog Interface
For maximum flexibility, the ADS7953EVM 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 P1. This header/socket provides access to the analog input pins
associated with CH0-CH7 of the ADS7953. Consult Samtec at http://www.samtec.com or call
1-800-SAMTEC-9 for a variety of mating connector options. Samtec part number TMS-108-02-G-D
provides access to analog input channels CH8-CH15 at J1.
Most of the pins on P1 and J1 are directly connected to the ADS7953 using a simple R/C filter with no
additional overvoltage protection circuitry. Use appropriate caution when handling these pins. Table 2 and
Table 3 summarize the pinouts for analog interfaces P1 and J1, respectively.
Table 2. Primary Analog Interface Pinout
Pin Number Signal Description
P1.2 CH7 CH7 input
P1.4 CH6 CH6 input
P1.6 CH5 CH5 input
P1.8 CH4 CH4 input
P1.10 CH3 CH3 input
P1.12 CH2 CH2 input
P1.14 CH1 CH1 input
P1.16 CH0 CH0 input
External reference source input (– side of
P1.18 EXTREFN
differential input)
External reference source input (+ side of
P1.20 EXTREFP
differential input)
J9.15 Unused —
P1.1-19 (odd) AGND Analog ground connections (except J1.15)
Table 3. Secondary Analog Interface Pinout
Pin Number Signal Description
J1.2 CH15 CH15 input
J1.4 CH14 CH14 input
J1.6 CH13 CH13 input
J1.8 CH12 CH12 input
J1.10 CH11 CH11 input
J1.12 CH10 CH10 input
J1.14 CH9 CH9 input
J1.16 CH8 CH8 input
J1.1-15 (odd) AGND Analog ground connections
4
ADS79xxEVM and ADS79xxEVM-PDK SLAU262C– January 2009– Revised May 2011
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