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ADS7812PB 参数 Datasheet PDF下载

ADS7812PB图片预览
型号: ADS7812PB
PDF下载: 下载PDF文件 查看货源
内容描述: 低功耗,串行12位采样模拟数字转换器 [Low-Power, Serial 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER]
分类和应用: 转换器模数转换器光电二极管
文件页数/大小: 17 页 / 383 K
品牌: BURR-BROWN [ BURR-BROWN CORPORATION ]
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®
ADS
781
2
ADS7812
ADS
781
2
Low-Power, Serial 12-Bit Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
20
µ
s max CONVERSION TIME
q
SINGLE +5V SUPPLY OPERATION
q
PIN-COMPATIBLE WITH 16-BIT ADS7813
q
EASY-TO-USE SERIAL INTERFACE
q
16-PIN 0.3" PLASTIC DIP AND SOIC
q
±
0.5LSB max INL AND DNL
q
72dB min SINAD
q
USES INTERNAL OR EXTERNAL
REFERENCE
q
MULTIPLE INPUT RANGES
q
35mW max POWER DISSIPATION
q
NO MISSING CODES
q
50
µ
W POWER DOWN MODE
DESCRIPTION
The ADS7812 is a low-power, single +5V supply, 12-
bit sampling analog-to-digital converter. It contains a
complete 12-bit capacitor-based SAR A/D with a
sample/hold, clock, reference, and serial data inter-
face.
The converter can be configured for a variety of input
ranges including
±10V, ±5V,
0V to 10V, and 0.5V to
4.5V. A high impedance 0.3V to 2.8V input range is
also available (input impedance > 10MΩ). For most
input ranges, the input voltage can swing to +16.5V or
–16.5V without damage to the converter.
A flexible SPI compatible serial interface allows data
to be synchronized to an internal or external clock.
The ADS7812 is specified at a 40kHz sampling rate
over the –40°C to +85°C temperature range. It is
available in a 16-pin 0.3" plastic DIP or a 16-lead
SOIC package.
APPLICATIONS
q
DATA ACQUISITION SYSTEMS
q
INDUSTRIAL CONTROL
q
TEST EQUIPMENT
q
DIGITAL SIGNAL PROCESSING
BUSY
PWRD
CONV
CS
Successive Approximation Register and Control Logic
Clock
40kΩ
(1)
R1
IN
8kΩ
(1)
R2
IN
CDAC
EXT/INT
Serial
20kΩ
(1)
R3
IN
BUF
CAP
REF
Buffer
4kΩ
(1)
Internal
+2.5V Ref
Comparator
Data
Out
DATACLK
DATA
NOTE: (1) Actual value may vary ±30%.
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
©
1997 Burr-Brown Corporation
PDS-1301A
1
Printed in U.S.A.
ADS7812
March, 1997