AD7327 반도체 회로 부품 판매점
12-Bit Plus Sign ADC
|
|
 Analog Devices |
www.DataSheet4U.com
500 kSPS, 8-Channel, Software-Selectable,
True Bipolar Input, 12-Bit Plus Sign ADC
AD7327
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
Eight analog input channels with channel sequencer
Single-ended, true differential, and pseudo differential
analog input capability
High analog input impedance
Low power: 17 mW
Temperature indicator
Full power signal bandwidth: 22 MHz
Internal 2.5 V reference
High speed serial interface
Power-down modes
20-lead TSSOP package
iCMOS™ process technology
GENERAL DESCRIPTION
The AD73271 is an 8-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 AD7327 can accept true bipolar analog input signals. The
AD7327 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 AD7327 can be programmed
to be single-ended, true differential, or pseudo differential.
The ADC contains a 2.5 V internal reference. The AD7327 also
allows for external reference operation. If a 3 V reference is
applied to the REFIN/OUT pin, the AD7327 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.
FUNCTIONAL BLOCK DIAGRAM
VDD
REFIN/OUT VCC
AD7327
VIN0
VIN1
VIN2
VIN3
VIN4
VIN5
VIN6
VIN7
I/P
MUX
2.5V
VREF
T/H
13-BIT
SUCCESSIVE
APPROXIMATION
ADC
TEMPERATURE
INDICATOR
CHANNEL
SEQUENCER
CONTROL LOGIC
AND REGISTERS
AGND
VSS DGND
Figure 1.
DOUT
SCLK
CS
DIN
VDRIVE
PRODUCT HIGHLIGHTS
1. The AD7327 can accept true bipolar analog input signals,
±10 V, ±5 V, ±2.5 V, and 0 V to +10 V unipolar signals.
2. The eight analog inputs can be configured as eight single-
ended inputs, four true differential inputs, four pseudo
differential inputs, or seven pseudo differential inputs.
3. 500 kSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™-
compatible interface.
4. Low power, 17 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
AD7324 1000 kSPS
AD7323 500 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
4
4
2
2
1 Protected by U.S. Patent No. 6,731,232.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
AD7327
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications .................................................................. 7
Absolute Maximum Ratings............................................................ 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 10
Terminology .................................................................................... 14
Theory of Operation ...................................................................... 16
Circuit Information.................................................................... 16
Converter Operation.................................................................. 16
Analog Input Structure.............................................................. 17
Typical Connection Diagram ................................................... 19
Analog Input ............................................................................... 19
Driver Amplifier Choice............................................................ 21
Registers ........................................................................................... 22
Addressing Registers .................................................................. 22
REVISION HISTORY
1/06—Revision 0: Initial Version
Control Register ......................................................................... 23
Sequence Register....................................................................... 25
Range Registers........................................................................... 25
Sequencer Operation ..................................................................... 26
Reference ..................................................................................... 28
VDRIVE............................................................................................ 28
Temperature Indicator............................................................... 28
Modes of Operation ....................................................................... 29
Normal Mode.............................................................................. 29
Full Shutdown Mode.................................................................. 29
Autoshutdown Mode ................................................................. 30
Autostandby Mode..................................................................... 30
Power vs. Throughput Rate....................................................... 31
Serial Interface ................................................................................ 32
Microprocessor Interfacing........................................................... 33
AD7327 to ADSP-21xx.............................................................. 33
AD7327 to ADSP-BF53x ........................................................... 33
Application Hints ........................................................................... 34
Layout and Grounding .............................................................. 34
Outline Dimensions ....................................................................... 35
Ordering Guide .......................................................................... 35
Rev. 0 | Page 2 of 36
|
PDF 파일 내의 페이지 : 총 30 페이지
제조업체: Analog Devices
( analogs )
AD7327 data
데이터시트 다운로드 :
[ AD7327.PDF ]
[ AD7327 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
AD7321
12-Bit Plus Sign ADC - Analog Devices
AD7322
12-Bit Plus Sign ADC - Analog Devices
AD7323
12-Bit Plus Sign ADC - Analog Devices
AD7324
12-Bit Plus Sign ADC - Analog Devices
AD7325
Low Quiescent Current Low Dropout CMOS Voltage Regulator - Advanced Corporation Limited
AD7327
12-Bit Plus Sign ADC - Analog Devices
AD7328
12-Bit Plus Sign ADC - Analog Devices
AD7328
Low Quiescent Current Low Dropout CMOS Voltage Regulator - Advanced Corporation Limited
AD7329
12-Bit Plus Sign ADC - Analog Devices