Texas Instruments ADS8168EVM-PDK, User Manual

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EVM Analog Interface
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6 SBAU291 – November 2017
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Copyright © 2017, Texas Instruments Incorporated
ADS8168EVM-PDK
2 EVM Analog Interface
The ADS8168EVM is designed for easy interfacing to analog sources. The 12-position, dual-row, pin
header connector, J3, provides convenient access to channels Ain1–Ain8 and Ain–COM of the device. In
addition, 3 SMA connectors, IN1, IN2, and IN9 provide a high quality connection to channels Ain1, Ain2,
and Ain-COM, respectively. For channels 1 and 2, a high-impedance input signal conditioning driver circuit
is provided. On all channels, a resistor-capacitor combination helps to provide a stable voltage on the
input of the ADS8168 multiplexer inputs.
Table 1. P2 Header Analog Interface Connections
Header Pin Number Signal Description
P2.1, P2.3, P2.5, P2.7, P2.9, P2.11, P2.13,
P2.15, P2.17, P2.19
GND Analog Ground
P2.2 COM ADC input common
P2.4 AIN1 Analog Channel 1
P2.6 AIN2 Analog Channel 2
P2.8 AIN3 Analog Channel 3
P2.10 AIN4 Analog Channel 4
P2.12 AIN5 Analog Channel 5
P2.14 AIN6 Analog Channel 6
P2.16 AIN7 Analog Channel 7
P2.18 AIN8 Analog Channel 8
P2.20, P2.22, P2.24 AV
DD
Positive analog power supply
P2.21, P2.23 AV
SS
Negative analog power supply (default connection is GND)