LTC1290 - Single Chip 12-Bit Data Acquisition System

The LTC®1290 is a data acquisition component which contains a serial I/O successive approximation A/D converter. It uses LTCMOS™ switched capacitor technology to perform either 12-bit unipolar or 11-bit plus sign bipolar A/D conversions. The 8-channel input multiplexer can be configured for either single-ended or differential inputs (or combinations thereof). An on-chip sample-and-hold is included for all single-ended input channels. When the LTC1290 is idle it can be powered down with a serial word in applications where low power consumption is desired.

The serial I/O is designed to be compatible with industry standard full duplex serial interfaces. It allows either MSB- or LSB-first data and automatically provides 2's complement output coding in the bipolar mode. The output data word can be programmed for a length of 8, 12 or 16 bits. This allows easy interface to shift registers and a variety of processors.

Features
  • Software Programmable Features-Unipolar/Bipolar Conversion-Four Differential/Eight Single Ended Inputs-MSB or LSB First Data Sequence-Variable Data Word Length-Power Shutdown
  • Built-In Sample-and-Hold
  • Single Supply 5V or ±5V Operation
  • Direct Four Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports
  • 50kHz Maximum Throughput Rate
  • Available in 20-Lead PDIP and SO Wide Packages
Typical Application
LTC1290 Typical Application
Applications
  • Resolution: 12 Bits
  • Fast Conversion Time: 13µs Max Over Temp
  • Low Supply Current: 6.0mA
Packaging
LTC1290 Package Drawing
LTC1290 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC1290BCN#PBFN-20C$25.00$19.75
LTC1290BCSW#PBFSW-20C$30.00$23.70
LTC1290BCSW#TRPBFSW-20C$23.80
LTC1290BIN#PBFN-20I$34.75$28.20
LTC1290BISW#PBFSW-20I$34.75$28.20
LTC1290BISW#TRPBFSW-20I$28.30
LTC1290CCN#PBFN-20C$20.00$15.80
LTC1290CCSW#PBFSW-20C$24.00$18.95
LTC1290CCSW#TRPBFSW-20C$19.05
LTC1290CIN#PBFN-20I$28.25$22.60
LTC1290CISW#PBFSW-20I$28.25$22.60
LTC1290CISW#TRPBFSW-20I$22.70
LTC1290DCN#PBFN-20C$8.35$6.60
LTC1290DCSW#PBFSW-20C$14.50$11.15
LTC1290DCSW#TRPBFSW-20C$11.25
LTC1290DIN#PBFN-20I$23.25$19.10
LTC1290DISW#PBFSW-20I$23.25$19.10
LTC1290DISW#TRPBFSW-20I$19.20
Datasheet
Application Note
Design Note
Reliability Data
CAD Symbol
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R107 Reliability Data
LTC1290 Footprints and Symbols