Features and Benefits

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

Product Details

The LTC1283 is a 3V data acquisition component which contains a serial I/O successive approximation A/D converter. It uses LTCMOSswitched capacitor technology to perform either 10-bit unipolar, or 9-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.

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-, 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.


  • 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: 44μs
  • Supply Current: 350µA Max, 150µA Typ

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Documentation & Resources

Product Recommendations

LTC1283 Companion Parts

Recommended µModule Isolator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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