®
ADS
784
2
ADS7842
For most current data sheet and other product
information, visit www.burr-brown.com
12-Bit, 4-Channel Parallel Output Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
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SINGLE SUPPLY: 2.7V to 5V
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4-CHANNEL INPUT MULTIPLEXER
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UP TO 200kHz SAMPLING RATE
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FULL 12-BIT PARALLEL INTERFACE
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±
1 LSB INL AND DNL
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GUARANTEED NO MISSING CODES
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72dB SINAD
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LOW POWER: 2mW
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SSOP-28 PACKAGE
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.
APPLICATIONS
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DATA ACQUISITION
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TEST AND MEASUREMENT
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INDUSTRIAL PROCESS CONTROL
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MEDICAL INSTRUMENTS
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LABORATORY EQUIPMENT
A0
A1
SAR
AIN0
AIN1
AIN2
CDAC
AIN3
4-Channel
MUX
ADS7842
Comparator
V
REF
Output
Latches
and
Three
State
Drivers
Three
State
Parallel
Data Bus
CLK
BUSY
WR
CS
RD
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1998 Burr-Brown Corporation
PDS-1484B
Printed in U.S.A. March, 2000
BURR-BROWN [ BURR-BROWN CORPORATION ]
