AD4116BCPZ datasheet(27/59 Pages) AD

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Data Sheet

AD4116

Rev. 0 | Page 27 of 59

CIRCUIT DESCRIPTION

MULIPLEXER

There are 12 standard voltage VIN pins and five low level voltage

ADCIN pins: VIN0 to VIN10, VINCOM, ADCIN11 to ADCIN15.

Each of these pins connects to the internal multiplexer. The

multiplexer enables these inputs to be configured as input pairs

(see the Voltage Inputs section and the Low Level Inputs section

for more information on how to setup these inputs). The

AD4116 can have up to 16 active channels. When more than

one channel is enabled, the channels are automatically sequenced

in order from the lowest enabled channel number to the highest

enabled channel number. The output of the multiplexer is

connected to the input of the integrated true rail-to-rail buffers.

These buffers can be bypassed, and the multiplexer output can

be directly connected to the switched capacitor input of the

ADC. The simplified input circuits are shown in Figure 39 and

Figure 40.

AVSS

ADCIN11

AVDD

+IN

–IN

MULTIPLEXER

AVSS

ADCIN12

AVDD

AVSS

ADCIN15

AVDD

Figure 39. Simplified Low Level Input Circuit

AVSS

VIN0

AVDD

VINCOM

AVDD

VIN1

AVDD

AVSS

AVDD

VBIAS–

+IN

–IN

MULTIPLEXER

2.2MΩ

2.2MΩ 2.2MΩ

2.2MΩ

9.9MΩ

Figure 40. Simplified Voltage Input Circuit

AD4116BCPZ Datasheet(PDF) 27 Page - Analog Devices

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