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Power Supplies

4 Power Supplies

J5 is the power-supply input connector, as shown in Table 5.

Table 5. J5 Configuration—Power-Supply Input

PIN NUMBER PIN NAME FUNCTION REQUIRED?

J5.1 +VA Not used No

J5.2 –VA Not used No

J5.3 +5VA +5V analog supply Always

J5.4 –5VA –5V analog supply Only in bipolar mode

J5.5 DGND Digital ground input Only if DGND is selected on J4

J5.6 AGND Analog ground input Only if AGND is selected on J4

J5.7 +1.8VD 1.8V digital supply Only if 1.8V is selected on J4

J5.8 VD1 Not used No

J5.9 +3.3VD 3.3V digital supply Always

J5.10 +5VD Not used No

4.1 Power Options

J4 is arranged as seven rows, each of which can be shorted, as shown in Table 6. For normal operation,

J4.1-2, J4.3-4, and J4.9-10 must be connected (directly or through an ammeter); either J4.5-6 or J4.7-8

must be connected, and either (or both) of J4.11-12 and J4.13-14 must be connected; otherwise, the

board will not function.

Table 6. J4 Configuration—Power Options

ROW NAME FUNCTION

AVDD supply current measurement point for the ADC.

1-2 ADC AVDD

Must be connected for operation.

AVSS supply current measurement point for the ADC.

3-4 ADC AVSS

Must be connected for operation.

When shorted, DVDD is sourced from the 1.8V power-supply input pin.

5-6 1.8V select

Should not be connected at the same time as 7-8.

When shorted, DVDD is sourced from the 3.3V power-supply input pin.

7-8 3.3V select

Should not be connected at the same time as 5-6.

DVDD supply current measurement point for the ADC.

9-10 ADC DVDD

Must be connected for operation.

11-12 DGND Connects DGND to board ground.

13-14 AGND Connects AGND to board ground.

SBAU126C– May 2007– Revised May 2011 ADS1158EVM, ADS1258EVM, ADS1158EVM-PDK, and ADS1258EVM-PDK

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