ADS8345_15 Datasheet, PDF (1/24 Pages) Texas Instruments – 16-Bit, 8-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER

ADS8345 ®
ADS8345 ®
ADS8345
SBAS177C – FEBRUARY 2001 – REVISED APRIL 2003
16-Bit, 8-Channel Serial Output Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q BIPOLAR INPUT RANGE
q PIN-FOR-PIN COMPATIBLE WITH THE
ADS7844 AND ADS8344
q SINGLE SUPPLY: 2.7V to 5V
q 8-CHANNEL SINGLE-ENDED OR
4-CHANNEL DIFFERENTIAL INPUT
q UP TO 100kHz CONVERSION RATE
q 85dB SINAD
q SERIAL INTERFACE
q QSOP-20 AND SSOP-20 PACKAGES
APPLICATIONS
q DATA ACQUISITION
q TEST AND MEASUREMENT EQUIPMENT
q INDUSTRIAL PROCESS CONTROL
q PERSONAL DIGITAL ASSISTANTS
q BATTERY-POWERED SYSTEMS
DESCRIPTION
The ADS8345 is an 8-channel, 16-bit, sampling
Analog-to-Digital (A/D) converter with a synchronous serial
interface. Typical power dissipation is 8mW at a 100kHz
throughput rate and a +5V supply. The reference voltage
(V_REF) can be varied between 500mV and V_CC/2, providing a
corresponding input voltage range of ±V_REF. The device
includes a shutdown mode which reduces power dissipation
to under 15µW. The ADS8345 is ensured down to 2.7V
operation.
Low-power, high-speed, and an onboard multiplexer make
the ADS8345 ideal for battery-operated systems such as
personal digital assistants, portable multi-channel data log-
gers, and measurement equipment. The serial interface also
provides low-cost isolation for remote data acquisition. The
ADS8345 is available in a QSOP-20 or SSOP-20 package
and is ensured over the –40°C to +85°C temperature range.
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
V_REF
8-Channel
Multiplexer
SAR
CDAC
Comparator
Serial
Interface
and
Control
DCLK
CS
SHDN
D_IN
D_OUT
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.
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