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ADS7809U 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
AD转换器
封装:
SOIC-20
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
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ADS7809U数据手册
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16-Bit 10µs Serial CMOS Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
● 100kHz SAMPLING RATE
● 86dB SINAD WITH 20kHz INPUT
● ±2LSB INL
● DNL: 16 Bits No Missing Codes
● SIX SPECIFIED INPUT RANGES
● SERIAL OUTPUT
● SINGLE +5V SUPPLY OPERATION
● PIN-COMPATIBLE WITH 12-BIT ADS7808
● USES INTERNAL OR EXTERNAL
REFERENCE
● 100mW MAX POWER DISSIPATION
● 0.3" SO-20
● 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.
10kΩ
CDAC
4kΩ
20kΩ
5kΩ
Internal
+2.5V Ref
Clock
BUSY
Data Clock
Serial Data
Successive Approximation Register and Control Logic
Serial
Data
Out
Comparator
Buffer
20kΩ
R/C CS
Power
Down
R1
IN
R2
IN
R3
IN
REF
CAP
ADS7809
SBAS017C – NOVEMBER 1996 – REVISED OCTOBER 2006
www.ti.com
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
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.
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