ADS7841_14 Datasheet, PDF (1/20 Pages) Texas Instruments – 12-Bit, 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER

ADS7841
ADS7841
ADS7841
SBAS084B – JULY 2001
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 ±1LSB MAX INL AND DNL
q NO MISSING CODES
q 72dB SINAD
q SERIAL INTERFACE
q DIP-16 OR SSOP-16 PACKAGE
q ALTERNATE SOURCE FOR MAX1247
q ADS7841ES: +125°C Version
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 inter-
face. The resolution is programmable to either 8 bits or 12
bits. Typical power dissipation is 2mW at a 200kHz through-
put rate and a +5V supply. The reference voltage (V_REF) can
be varied between 100mV and V_CC, providing a correspond-
ing input voltage range of 0V to V_REF. The device includes
a shutdown mode which reduces power dissipation to under
15µW. The ADS7841 is tested down to 2.7V operation.
Low power, high speed, and on-board multiplexer make the
ADS7841 ideal for battery-operated systems such as per-
sonal digital assistants, portable multi-channel data loggers,
and measurement equipment. The serial interface also pro-
vides low-cost isolation for remote data acquisition. The
ADS7841 is available in a DIP-16 or a SSOP-16 package
and is specified over the –40°C to +125°C⁽¹⁾ temperature
range.
NOTE: (1) ES grade only.
CH0
CH1
CH2
CH3
COM
V_REF
Four
Channel
Multiplexer
SAR
CDAC
Comparator
Serial
Interface
and
Control
DCLK
CS
SHDN
DIN
DOUT
MODE
BUSY
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.
www.ti.com
Copyright © 2000, Texas Instruments Incorporated