ADS7842 Datasheet, PDF (1/13 Pages) Burr-Brown (TI) – 12-Bit, 4-Channel Parallel Output Sampling ANALOG-TO-DIGITAL CONVERTER

®
ADS7842
ADS7842
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12-Bit, 4-Channel Parallel Output Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q SINGLE SUPPLY: 2.7V to 5V
q 4-CHANNEL INPUT MULTIPLEXER
q UP TO 200kHz SAMPLING RATE
q FULL 12-BIT PARALLEL INTERFACE
q ±1 LSB INL AND DNL
q GUARANTEED NO MISSING CODES
q 72dB SINAD
q LOW POWER: 2mW
q SSOP-28 PACKAGE
APPLICATIONS
q DATA ACQUISITION
q TEST AND MEASUREMENT
q INDUSTRIAL PROCESS CONTROL
q MEDICAL INSTRUMENTS
q LABORATORY EQUIPMENT
DESCRIPTION
The ADS7842 is a complete, 4-channel, 12-bit analog-
to-digital converter (ADC). It contains a 12-bit, ca-
pacitor-based, SAR A/D with a sample-and-hold am-
plifier, interface for microprocessor use and parallel,
three-state output drivers. The ADS7842 is specified
at a 200kHz sampling rate while dissipating only
2mW of power. The reference voltage can be varied
from 100mV to V_CC with a corresponding LSB reso-
lution from 24µV to 1.22mV. The ADS7842 is guar-
anteed down to 2.7V operation.
Low power, high speed and an on-board multiplexer
make the ADS7842 ideal for battery-operated sys-
tems such as portable, multi-channel dataloggers and
measurement equipment. The ADS7842 is available
in a SSOP-28 package and is guaranteed over the
–40°C to +85°C temperature range.
AIN0
AIN1
AIN2
AIN3
V_REF
A0 A1
4-Channel
MUX
SAR
ADS7842
CDAC
Comparator
Output
Latches
and
Three
State
Drivers
Three
State
Parallel
Data Bus
CLK
BUSY
WR
CS
RD
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©_{1998 Burr-Brown Corporation}
PDS-1484B
Printed in U.S.A. March, 2000