Mmb0 Configuration For A Bipolar Bench Power Supply - Texas Instruments ADS126 EVM-PDK Series User Manual

ADS126xEVM Hardware
2.3.2 Bipolar ±2.5-V Supplies Configuration
To use the ADS126x with bipolar supplies, an external –5-V bench supply is required. If a negative supply
is not available, a positive 5-V supply capable of sinking current can be connected with reversed polarity.
First, configure the MMB0 in one of the configurations methods shown in
Next, connect a –5-V supply to the -5VA net on terminal block J14, as shown in
After the MMB0 is configured, latch switch S2 (on the ADS126xEVM) into the 1-2 and 4-5 position
(switched to the right) to select the bipolar supply.
Figure 8. MMB0 Configuration for a Bipolar Bench Power Supply
NOTE: The ADS126xEVM uses the power supply connections from +5VA, -5VA, +3.3VD, and GND
on the MMB0 board.
MMB0 jumper J13A has no effect on the circuit behavior of the ADS126xEVM as long as no
other supply is connected to +VA. Do not short jumper J13A when another supply is
connected to +VA.
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ADS126xEVM-PDK
USB connector
+
±
5V 5V
+
±
Power Input
Copyright © 2015, Texas Instruments Incorporated
Section 2.3.1.
Figure
Open jumper (J12)
Shorted jumper (J13B)
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8.
SBAU206 – April 2015