Datasheet

ADS131E08EVM Daughter-Card Hardware Overview

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The front-end board must be properly configured in order to achieve the various power-supply schemes.

The default power-supply setting for the ADS131E08EVM is a bipolar analog supply of ±2.5 V, and there

are onboard options to switch to a unipolar analog supply of +3 V. The digital supply (DVDD) is selectable

to either +3.3 V or +1.8 V. Table 2 shows the board and component configurations for each analog power-

supply scheme. Table 3 shows the board configurations for the digital supply. Note that the EVM is

shipped with the analog supply set to ±2.5 V and digital supplies set to 3.3 V.

Table 2. Analog Supply Configurations

Unipolar Analog Supply Bipolar Analog Supply

AVDD and AVSS 3 V 5 V ±1.5 V ±2.5 V

JP7 1-2 1-2 2-3 2-3

JP1 2-3 2-3 1-2 1-2

U6 TPS73230 TPS73250 Don't care Don't care

U8 Don't care Don't care TPS73201 TPS73201

U7 Don't care Don't care TPS72301 TPS72301

R61 Don't care Don't care 21 kΩ 47.5 kΩ

R62 Don't care Don't care 78.7 kΩ 43.2 kΩ

R59 Don't care Don't care 23.3 kΩ 49.9 kΩ

R60 Don't care Don't care 95.3 kΩ 46.4 kΩ

C48, C54, C59 Not installed Not installed Not installed Not installed

Table 3. Digital Supply Configurations (DVDD and DGND)

DVDD 3.3 V +1.8 V

JP7 1-2 1-2

JP1 2-3 2-3

U6 TPS73230 TPS73250

U8 Don't care Don't care

U7 Don't care Don't care

R61 Don't care Don't care

R62 Don't care Don't care

R59 Don't care Don't care

R60 Don't care Don't care

C48, C54, C59 Not installed Not installed

Performance Demonstration Kit for the ADS131E08 SBAU200–June 2012

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