ADS7813
ADS
781
3
ADS
781
3
SBAS043C – MARCH 1997 – REVISED SEPTEMBER 2005
Low-Power, Serial 16-Bit Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
20
µ
s max CONVERSION TIME
q
SINGLE +5V SUPPLY OPERATION
q
PIN-COMPATIBLE WITH 12-BIT ADS7812
q
EASY-TO-USE SERIAL INTERFACE
q
0.3" DIP-16 AND SO-16
q
±
2.0LSB max INL
q
87dB 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 ADS7813 is a low-power, single +5V supply, 16-bit
sampling analog-to-digital (A/D) converter. It contains a
complete 16-bit capacitor-based SAR A/D with a
sample/hold, clock, reference, and serial data interface.
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 ADS7813
is specified at a 40kHz sampling rate over the –40°C to
+85°C temperature range. It is available in a 0.3" DIP-16 or
an SO-16 package.
APPLICATIONS
q
q
q
q
q
q
q
MEDICAL INSTRUMENTATION
DATA ACQUISITION SYSTEMS
ROBOTICS
INDUSTRIAL CONTROL
TEST EQUIPMENT
DIGITAL SIGNAL PROCESSING
DSP SERVO CONTROL
40kΩ
(1)
R1
IN
8kΩ
(1)
R2
IN
Serial
20kΩ
(1)
R3
IN
BUF
CAP
REF
Buffer
4kΩ
(1)
Internal
+2.5V Ref
Comparator
Data
Out
DATA
DATACLK
EXT/INT
BUSY
PWRD
CONV
CS
Successive Approximation Register and Control Logic
Clock
CDAC
NOTE: (1) Actual value may vary ±30%.
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 © 1997-2005, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
