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This preliminary user's guide gives a general overview of the ADS5231/32/37 evaluation module (EVM),
and provides a general description of the features and functions to be considered while using this module.
1
Overview
1.1
Purpose
The ADS5231/32/37 EVM provides a platform for evaluating the ADS5231/32/37 dual, 12-bit,
analog-to-digital converter (ADC) under various signal, reference, and supply conditions. This document
should be used in combination with the EVM schematic diagram supplied.
1.2
EVM Basic Functions
Analog inputs to the ADC are provided via external SMA connectors. The single-ended input the user
provides is converted into a differential signal at the input of the device for both channels. Both analog
input channels of the ADS5231/32/37 EVM have two independent paths. One input path uses a differential
amplifier, while the other path is transformer-coupled.
The EVM provides an external SMA connector for input of the ADC clock. The single-ended input that the
user provides is transformer-coupled to provide a differential signal at both clock inputs of the device. The
EVM also allows the user to send a single-ended or true-differential clock if desired.
Digital outputs from the EVM are via two 40-pin connectors. The digital outputs from the ADC are buffered
before going to the connectors. The digital output connectors can be mated to TI's TSW1100 for digital
capture.
Power connections to the EVM are via banana jack sockets. Separate sockets are provided for the ADC
analog and output driver supplies, external buffers supply, and differential amplifiers supply.
1.3
Power Requirements
The EVM can be powered directly with only a single 3.3-V supply if using the module with
transformer-coupled input and internal reference mode. ±5 V is required if using the differential amplifier
input. A provision has been made to allow the EVM to be powered with independent analog and digital
supplies to provide higher performance.
Voltage Limits
Exceeding the maximum input voltages can damage EVM components. Undervoltage may cause
improper operation of some or all of the EVM components.
SBAU111B – May 2006 – Revised November 2007
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SBAU111B – May 2006 – Revised November 2007
ADS5231/32/37 EVM
ADS5231/32/37 EVM
User's Guide
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