AD7323 ADC Datasheet

AD7323 Datasheet, PDF, Equivalent


Part Number

AD7323

Description

12-Bit Plus Sign ADC

Manufacture

Analog Devices

Total Page 30 Pages
Datasheet
Download AD7323 Datasheet


AD7323
Data Sheet
500 kSPS, 4-Channel, Software-Selectable,
True Bipolar Input, 12-Bit Plus Sign ADC
AD7323
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
Four analog input channels with channel sequencer
Single-ended, true differential, and pseudo differential
analog input capability
High analog input impedance
Low power: 18 mW
Full power signal bandwidth: 22 MHz
Internal 2.5 V reference
High speed serial interface
Power-down modes
16-lead TSSOP package
iCMOS process technology
FUNCTIONAL BLOCK DIAGRAM
VDD
REFIN/OUT VCC
AD7323
VIN0
VIN1
VIN2
VIN3
I/P
MUX
2.5V
VREF
T/H
13-BIT
SUCCESSIVE
APPROXIMATION
ADC
CHANNEL
SEQUENCER
AGND
CONTROL LOGIC
AND REGISTERS
VSS DGND
Figure 1.
DOUT
SCLK
CS
DIN
VDRIVE
GENERAL DESCRIPTION
The AD73231 is a 4-channel, 12-bit plus sign successive
approximation analog-to-digital converter (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 conven-
tional CMOS processes, iCMOS components can accept bipolar
input signals while providing increased performance, dramati-
cally reduced power consumption, and reduced package size.
The AD7323 can accept true bipolar analog input signals. The
AD7323 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 AD7323 can be programmed
to be single-ended, true differential, or pseudo differential.
The ADC contains a 2.5 V internal reference. The AD7323 also
allows for external reference operation. If a 3 V reference is
applied to the REFIN/OUT pin, the AD7323 can accept a true
bipolar ±12 V analog input. Minimum ±12 V VDD and VSS
supplies are required for the ±12 V input range. The ADC has a
high speed serial interface that can operate at throughput rates
up to 500 kSPS.
1 Protected by U.S. Patent No. 6,731,232.
Rev. B
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
PRODUCT HIGHLIGHTS
1. The AD7323 can accept true bipolar analog input signals,
±10 V, ±5 V, and ±2.5 V, and 0 V to +10 V unipolar signals.
2. The four analog inputs can be configured as four single-
ended inputs, two true differential input pairs, two pseudo
differential inputs, or three pseudo differential inputs.
3. 500 kSPS serial interface. SPI-/QSPI™-/DSP-/MICROWIRE™-
compatible interface.
4. Low power, 18 mW, at a maximum throughput rate of
500 kSPS.
5. Channel sequencer.
Table 1. Similar Devices
Device Throughput
Number Rate
AD7329 1000 kSPS
AD7328 1000 kSPS
AD7327 500 kSPS
AD7324 1000 kSPS
AD7322 1000 kSPS
AD7321 500 kSPS
Number of bits
12-bit plus sign
12-bit plus sign
12-bit plus sign
12-bit plus sign
12-bit plus sign
12-bit plus sign
Number of
Channels
8
8
8
4
2
2
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Technical Support
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AD7323
AD7323* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
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Evaluation Kits
• AD7323 Evaluation Board
• AD7327 Evaluation Board
Documentation
Data Sheet
• AD7323: 500 kSPS, 4-Channel, Software-Selectable, True
Bipolar Input, 12-Bit Plus Sign ADC Data Sheet
Software and Systems Requirements
• AD7323 Evaluation Software
Reference Materials
Technical Articles
• MS-2210: Designing Power Supplies for High Speed ADC
Design Resources
• AD7323 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
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Features Data Sheet 500 kSPS, 4-Channel, Softwar e-Selectable, True Bipolar Input, 12-Bi t Plus Sign ADC AD7323 FEATURES 12-bit plus sign SAR ADC True bipolar input r anges Software-selectable input ranges ±10 V, ±5 V, ±2.5 V, 0 V to +10 V 50 0 kSPS throughput rate Four analog inpu t channels with channel sequencer Singl e-ended, true differential, and pseudo differential analog input capability Hi gh analog input impedance Low power: 18 mW Full power signal bandwidth: 22 MHz Internal 2.5 V reference High speed se rial interface Power-down modes 16-lead TSSOP package iCMOS process technology FUNCTIONAL BLOCK DIAGRAM VDD REFIN/ OUT VCC AD7323 VIN0 VIN1 VIN2 VIN3 I /P MUX 2.5V VREF T/H 13-BIT SUCCESSIV E APPROXIMATION ADC CHANNEL SEQUENCER AGND CONTROL LOGIC AND REGISTERS VSS D GND Figure 1. DOUT SCLK CS DIN VDRIVE 05400-001 GENERAL DESCRIPTION The AD7 3231 is a 4-channel, 12-bit plus sign s uccessive approximation analog-to-digit al converter (ADC) designed on the iCMOS™ (industrial CMOS) p.
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