Texas Instruments ADS131E08, User Manual, Page: 12 / 47

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 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 k Ω 47.5 k Ω
R62 Don't care Don't care 78.7 k Ω 43.2 k Ω
R59 Don't care Don't care 23.3 k Ω 49.9 k Ω
R60 Don't care Don't care 95.3 k Ω 46.4 k Ω
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
12 Performance Demonstration Kit for the ADS131E08 SBAU200 – June 2012
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