ADS7817E Datasheet, PDF (1/21 Pages) Texas Instruments – 12-Bit Differential Input Micro Power Sampling

ADS7817
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ADS7817
SBAS066A – MAY 2001
12-Bit Differential Input Micro Power Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q BIPOLAR INPUT RANGE
q TRUE DIFFERENTIAL INPUT
q 200kHz SAMPLING RATE
q MICRO POWER: 2.3mW at 200kHz
q POWER DOWN: 3µA Max
q AVAILABLE IN MSOP-8 PACKAGE
q SERIAL INTERFACE
q AC COMMON-MODE REJECTION
APPLICATIONS
q TRANSDUCER INTERFACE
q BATTERY OPERATED SYSTEMS
q REMOTE DATA ACQUISITION
q ISOLATED DATA ACQUISITION
q AC MOTOR CONTROL
DESCRIPTION
The ADS7817 is a 12-bit, 200kHz sampling Analog-to-
Digital (A/D) converter that features a high impedance fully
differential analog input. The reference voltage can be var-
ied from 100mV to 2.5V, with a corresponding input-
referred resolution between 49µV and 1.22mV.
The differential input, low power, automatic power down,
and small size make the ADS7817 ideal for direct connec-
tion to transducers in battery operated systems, remote data
acquisition, or multi-channel applications. The ADS7817 is
available in a plastic mini-DIP-8, an SO-8, or an MSOP-8
package.
V_REF
+In
–In
S/H Amp
SAR
CDAC
Comparator
Control
Serial
Interface
D_OUT
DCLOCK
CS/SHDN
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.
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.
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Copyright © 1997, Texas Instruments Incorporated