Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsDev KitsPCB design board

(MUXCAL=001)

SystemMonitors

Temperature

Diode

VREFP

VREFN

VREFP1/4

VREFN1/4

VREFP0/4

VREFN0/4

AVDD/4

AVSS/4

DVDD/4

DVSS/4

ADS1248Only

ADS1247/48Only

VBIAS

AIN0

AIN1

VBIAS

AIN2

VBIAS

AIN3

VBIAS

AIN4

VBIAS

AIN5

VBIAS

AIN6

VBIAS

AIN7

AVDD

IDAC1

IDAC2

AVDD

VBIAS

PGA

AIN

AVSS

AVDD

BurnoutCurrentSource

(0.5 A,2 A,10m m mA)

BurnoutCurrentSource

(0.5 A,2 A,10m m mA)

AIN

ADC

AVSS

AVDD

AVDD AVDD

Evaluating Performance with the ADCPro Software

www.ti.com

9.1.1 I/O Config Tab

This tab is the primary tab that controls the function of the multiplexer in the ADS1247. Recall that the

ADS1247 multiplexer is configured as shown in Figure 15. By default, all channels are set as analog input;

the IDACs are not routed to any channel and the IDAC controls are disabled. These controls are enabled

when the correct IDAC settings are made on the Power & Ref tab (see Section 9.1.3).

Figure 15. ADS1247 Multiplexer

The radio buttons at the far right of the panel (see Figure 16) select which pair of inputs are connected to

the PGA. Note that you may select the same input for both the positive (AINP) and negative (AINN) input;

this configuration is often selected to perform a noise test on the ADC itself.

ADS1147EVM, ADS1247EVM, ADS1147EVM-PDK, ADS1247EVM-PDK SBAU148B– June 2009– Revised May 2011

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