ADS8381 Datasheet, PDF (1/35 Pages) Texas Instruments – 18-BIT, 580-kHz, UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE

ADS8381
SLAS364D − APRIL 2002 − REVISED FEBRUARY 2005
18ĆBIT, 580ĆkHz, UNIPOLAR INPUT, MICRO POWER SAMPLING
ANALOGĆTOĆDIGITAL CONVERTER WITH PARALLEL INTERFACE
FEATURES
D 580-kHz Sample Rate
D 18-Bit NMC Ensured Over Temperature
D Zero Latency
D Low Power: 115 mW at 580 kHz
D Unipolar Input Range
D Onboard Reference Buffer and Conversion
Clock
D Wide Buffer Supply, 2.7 V to 5.25 V
D Flexible 8-/16-/18-Bit Parallel Interface
D Pin Compatible With ADS8383
D 48-Pin TQFP Package
APPLICATIONS
D Medical Instruments
D Optical Networking
D Transducer Interface
D High Accuracy Data Acquisition Systems
D Magnetometers
DESCRIPTION
The ADS8381 is an 18-bit, 580 kHz A/D converter. The
device includes a 18-bit capacitor-based SAR A/D
converter with inherent sample and hold. The ADS8381
offers a full 18-bit interface, a 16-bit option where data is
read using two read cycles, or an 8-bit bus option using
three read cycles.
The ADS8381 is available in a 48-lead TQFP package and
is characterized over the industrial −40°C to 85°C
temperature range.
+IN +
_
−IN
REFIN
SAR
CDAC
Comparator
Clock
Output
Latches
and
3-State
Drivers
BUS 18/16
BYTE
18-/16-/8-Bit
Parallel DATA
Output Bus
Conversion
and
Control Logic
CONVST
BUSY
CS
RD
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.
Copyright  2002−2005, Texas Instruments Incorporated