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LTC1283 - 3V Single Chip 10-Bit Data Acquisition System

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. 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 comple-ment output coding in the bipolar mode. The output data word can be programmed for a length of 8-, 10-, 12-, or 16-bit. This allows easy interface to shift registers and a variety of processors. Both the LTC1283A and LTC1283 are specified with offset and linearity errors less than ±0.5LSB. The LTC1283A has a gain error limit of ±1LSB. The 1283 is specified with a gain error limit of ±2LSB for applications where gain is adjustable or less critcial.

Features Single Supply 3.3V or ±3.3V Operation Software Programmable Features: Unipolar/Bipolar Conversions 4 Differential/8 Single-Ended Inputs MSB- or LSB-First Built-In Sample-and-Hold Direct 4-Wire Interface to Most MPU Serial Ports and all MPU Parallel Ports 15kHz Maximum Throughput Rate Typical Application

Applications Minimum Guaranteed Supply Voltage: 3V Resolution: 10 Bits Offset Error: ±0.5LSB Max Linearity Error: ±0.5LSB Max Gain Error (LTC1283A): ±1LSB Max Conversion Time: 44µms Supply Current: 350µA Max, 150µA Typ Packaging

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