ADS7841 Datasheet, PDF (1/14 Pages) Burr-Brown (TI) – 12-Bit, 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER

®
ADS7841
ADS7841
ADS7841
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
APPLICATIONS
q DATA ACQUISITION
q TEST AND MEASUREMENT
q INDUSTRIAL PROCESS CONTROL
q PERSONAL DIGITAL ASSISTANTS
q BATTERY-POWERED SYSTEMS
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.
CH0
CH1
CH2
CH3
COM
V_REF
Four
Channel
Multiplexer
SAR
CDAC
Comparator
Serial
Interface
and
Control
DCLK
CS
SHDN
DIN
DOUT
MODE
BUSY
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©_{1998 Burr-Brown Corporation}
PDS-1420B
Printed in U.S.A. June, 1998