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Analog Interface
2 Analog Interface
The ADS8354 is a low-power, dual-channel, simultaneous-sampling ADC that supports differential analog inputs.
The ADS8354EVM uses two THS4561 fully-differential amplifiers to drive the differential ADC channel inputs
(AINP_A, AINM_A and AINP_B, AINM_B) and to center the input signal around the required common-mode
voltage for the ADS8354. An OPA320 device is used to buffer the selected common-mode voltage (VOCM). The
ADS8354EVM is designed for easy interfacing to analog sources. This section describes the front-end driver
circuitry details, including jumper configurations for the analog input signal source.
2.1 Connectors for Analog Inputs
The ADS8354EVM has two 16-bit, simultaneous-sampling ADCs. The ADS8354EVM GUI can either be
configured for individual ADC data sampling or simultaneous sampling with both ADCs. The ADS8354EVM
is designed to interface to an external, analog source through either subminiature version A (SMA) connectors
or 100-mil headers. Jumpers J1, J2, J3, and J4 are the SMA connectors that allow for analog signal source
connectivity through coaxial cables. Alternatively, 100-mil jumper cables or mini-grabbers can be used to
connect analog sources to pin 1 of connectors JP1, JP2, JP3, and JP4.
connectors for the individual ADCs.
Pin Number
J1 and J2
JP2[1] and JP3[1]
J3 and J4
JP1[1] and JP4[1]
4
ADS8354EVM-PDK Evaluation Module
Table 2-1. Analog Input Connector Description
Signal
AINM_A,
Analog inputs provided at the SMA for ADC A
AINP_A
AINM_A,
Alternate location to provide the analog inputs for ADC A
AINP_A
AINM_B,
Analog inputs provided at the SMA for ADC B
AINP_B
AINM_B,
Alternate location to provide the analog inputs for ADC B
AINP_B
Copyright © 2023 Texas Instruments Incorporated
Table 2-1
lists the analog input
Description
www.ti.com
SBAU407 – APRIL 2023
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