AD7329 Analog Devices, AD7329 Datasheet - Page 10

• Manufacturer Part Number: AD7329
• Description: 1 MSPS , 8-Channel, Software Selectable True Bipolar Input, 12-Bit Plus Sign A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7329

• Resolution (bits): 13bit
• # Chan: 8
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Uni
• Ain Range: Bip (Vref),Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 2.5V,Bip 5.0V,Uni (Vref),Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

AD7329
Pin No.
17
18
9, 10, 16, 15,
11, 12, 14, 13
Mnemonic
MUX
ADC
V
IN
0 to V
IN
OUT
−
−
IN
7
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 MUX
pseudo differential mode, a small dc voltage appears at this pin, and this pin should be tied to the ADC
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 MUX
mode, this pin should be connected to MUX
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, V
IN
0 is automatically selected and the voltage on this pin appears on MUX
OUT
−, which is connected to AGND. When the AD7329 is in pseudo differential
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OUT
− can be connected directly to the ADC
OUT
−. When the AD7329 is in true differential mode, the voltage
IN
− pin. When the AD7329 is in
OUT
+.
IN
− pin.