AD7329BRUZ View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

AD7329BRUZ

1 MSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC

Analog Devices 

AD7329

Pin No.

17

18

9, 10, 16, 15,

11, 12, 14, 13

Mnemonic

MUXOUT−

ADCIN−

VIN0 to VIN7

Descriptions

Negative Multiplexer Output. This pin allows access to the on-chip track-and-hold. The voltage applied to this

pin is still a high voltage signal when the AD7329 is in differential mode. When the AD7329 is in single-ended

mode, this signal is AGND, and MUXOUT− can be connected directly to the ADCIN− pin. When the AD7329 is in

pseudo differential mode, a small dc voltage appears at this pin, and this pin should be tied to the ADCIN− pin.

Negative ADC Input. This pin allows access to the track-and-hold. When the AD7329 is in single-ended mode,

this pin can be tied to MUXOUT−, which is connected to AGND. When the AD7329 is in pseudo differential

mode, this pin should be connected to MUXOUT−. When the AD7329 is in true differential mode, the voltage

applied to this pin is a high voltage signal (±10 V, ±5 V, ±2.5 V, or 0 V to +10 V).

Analog Input 0 Through Analog Input 7. The analog inputs are multiplexed into the on-chip track-and-hold.

The analog input channel for conversion is selected by programming the channel address bits, ADD2

through ADD0, in the control register. The inputs can be configured as eight single-ended inputs, four true

differential input pairs, four pseudo differential inputs, or seven pseudo differential inputs. The configuration

of the analog inputs is selected by programming the mode bits, Mode 1 and Mode 0, in the control register.

The input range on each input channel is controlled by programming the range registers. Input ranges of

±10 V, ±5 V, ±2.5 V, or 0 V to +10 V can be selected on each analog input channel (see the Range Registers

section). On power up, VIN0 is automatically selected and the voltage on this pin appears on MUXOUT+.

Rev. A | Page 10 of 40

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