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ADS7809U 参数 Datasheet PDF下载

ADS7809U图片预览
型号: ADS7809U
PDF下载: 下载PDF文件 查看货源
内容描述: 16位10μs串行CMOS采样模拟数字转换器 [16-Bit 10μs Serial CMOS Sampling ANALOG-TO-DIGITAL CONVERTER]
分类和应用: 转换器光电二极管
文件页数/大小: 19 页 / 867 K
品牌: TI [ TEXAS INSTRUMENTS ]
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ADS7809
7809
ADS
SBAS017C – NOVEMBER 1996 – REVISED OCTOBER 2006
16-Bit 10
µ
s Serial CMOS Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
100kHz SAMPLING RATE
q
86dB SINAD WITH 20kHz INPUT
q
±
2LSB INL
q
DNL: 16 Bits No Missing Codes
q
SIX SPECIFIED INPUT RANGES
q
SERIAL OUTPUT
q
SINGLE +5V SUPPLY OPERATION
q
PIN-COMPATIBLE WITH 12-BIT ADS7808
q
USES INTERNAL OR EXTERNAL
REFERENCE
q
100mW MAX POWER DISSIPATION
q
0.3" SO-20
q
SIMPLE DSP INTERFACE
DESCRIPTION
The ADS7809 is a complete 16-bit sampling Analog-to-
Digital (A/D) converter using state-of-the-art CMOS struc-
tures. It contains a 16-bit capacitor-based Successive Ap-
proximation Register (SAR) A/D converter with sample-and-
hold, reference, clock, and a serial data interface. Data can
be outputted using the internal clock, or can be synchronized
to an external data clock. The ADS7809 also provides an
output synchronization pulse for ease of use with standard
DSP processors.
The ADS7809 is specified at a 100kHz sampling rate, and
specified over the full temperature range. Laser-trimmed
scaling resistors provide various input ranges including
±10V
and 0V to 5V, while an innovative design operates from a
single +5V supply, with power dissipation under 100mW.
The ADS7809 is available in a 0.3" SO-20, and is fully
specified for operation over the industrial –40°C to +85°C
range.
R/C
CS
Power
Down
Successive Approximation Register and Control Logic
Clock
20kΩ
R1
IN
10kΩ
R2
IN
20kΩ
5kΩ
R3
IN
CAP
Buffer
4kΩ
REF
Internal
+2.5V Ref
Comparator
Serial
Data
Out
Serial Data
Data Clock
BUSY
CDAC
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1996-2006, Texas Instruments Incorporated
www.ti.com