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AD7321

Part Number	AD7321
Manufacturer	Analog Devices
Description	12-Bit Plus Sign ADC
Published	Jan 17, 2007
Detailed Description	www.DataSheet4U.com 500 kSPS, 2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC AD7321 FEATURES ...
Datasheet	AD7321 PDF File

Overview

www.
DataSheet4U.
com 500 kSPS, 2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC AD7321 FEATURES 12-bit plus sign SAR ADC True bipolar input ranges Software-selectable input ranges ±10 V, ±5 V, ±2.
5 V, 0 V to +10 V 500 kSPS throughput rate Two analog input channels with channel sequencer Single-ended, true differential, and pseudo differential analog input capability High analog input impedance Low power: 17 mW Full power signal bandwidth: 22 MHz Internal 2.
5 V reference High speed serial interface Power-down modes 14-lead TSSOP package iCMOS™ process technology FUNCTIONAL BLOCK DIAGRAM VDD REFIN/OUT VCC AD7321 2.
5V VREF I/P MUX T/H VIN0 VIN1 13-BIT SUCCESSIVE APPROXIMATION ADC DOUT CHANNEL SEQUENCER CONTROL LOGIC AND REGISTERS SCLK CS DIN VDRIVE AGND VSS DGND 05399-001 Figure 1.
GENERAL DESCRIPTION The AD7321 1 is a 2-channel, 12-bit plus sign successive approximation ADC designed on the iCMOS (industrial CMOS) process.
iCMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies.
It enables the development of a wide range of high performance analog ICs capable of 33 V operation in a footprint that no previous generation of high voltage parts could achieve.
Unlike analog ICs using conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, dramatically reduced power consumption, and reduced package size.
The AD7321 can accept true bipolar analog input signals.
The AD7321 has four software-selectable input ranges, ±10 V, ±5 V, ±2.
5 V, and 0 V to +10 V.
Each analog input channel can be independently programmed to one of the four input ranges.
The analog input channels on the AD7321 can be programmed to be single-ended, true differential, or pseudo differential.
The ADC contains a 2.
5 V internal reference.
The AD7321 also allows for external reference operation.
If a 3 V reference is applied to the REFIN/OUT pin, the AD7321 can accept...

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