®
ADS
784
1
ADS7841
ADS
784
1
12-Bit, 4-Channel Serial Output Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
SINGLE SUPPLY: 2.7V to 5V
q
4-CHANNEL SINGLE-ENDED OR
2-CHANNEL DIFFERENTIAL INPUT
q
UP TO 200kHz CONVERSION RATE
q
±
1 LSB MAX INL AND DNL
q
GUARANTEED NO MISSING CODES
q
72dB SINAD
q
SERIAL INTERFACE
q
16-PIN PDIP OR 16-LEAD SSOP PACKAGE
q
ALTERNATE SOURCE FOR MAX1247
DESCRIPTION
The ADS7841 is a 4-channel, 12-bit sampling analog-
to-digital converter (ADC) with a synchronous serial
interface. The resolution is programmable to either 8
or 12 bits. Typical power dissipation is 2mW at a
200kHz throughput rate and a +5V supply. The refer-
ence voltage (V
REF
) can be varied between 100mV and
V
CC
, providing a corresponding input voltage range of
0V to V
REF
. The device includes a shutdown mode
which reduces power dissipation to under 15µW. The
ADS7841 is guaranteed down to 2.7V operation.
Low power, high speed, and on-board multiplexer
make the ADS7841 ideal for battery operated systems
such as personal digital assistants, portable multi-
channel data loggers, and measurement equipment.
The serial interface also provides low-cost isolation
for remote data acquisition. The ADS7841 is available
in a 16-pin PDIP or a 16-lead SSOP package and is
guaranteed over the –40°C to +85°C temperature range.
APPLICATIONS
q
DATA ACQUISITION
q
TEST AND MEASUREMENT
q
INDUSTRIAL PROCESS CONTROL
q
PERSONAL DIGITAL ASSISTANTS
q
BATTERY-POWERED SYSTEMS
SAR
DCLK
CS
CH0
CH1
CH2
CH3
COM
V
REF
Four
Channel
Multiplexer
CDAC
Comparator
Serial
Interface
and
Control
SHDN
DIN
DOUT
MODE
BUSY
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1998 Burr-Brown Corporation
PDS-1420B
Printed in U.S.A. June, 1998
BURR-BROWN [ BURR-BROWN CORPORATION ]
