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AD7329 Datasheet(PDF) 10 Page - Analog Devices

Part No. AD7329
Description  1 MSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7329 Datasheet(HTML) 10 Page - Analog Devices

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AD7329
Rev. 0 | Page 10 of 40
Pin No.
Mnemonic
Descriptions
17
MUXOUT
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.
18
ADCIN
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).
9 to 16
VIN0 to VIN7
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+.


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