LTC1290BIJ

Analog To Digital Converters (ADC) Overview

The LTC1290BIJ is a single-chip 12-bit data acquisition system manufactured by Analog Devices Inc. It integrates an 8-channel analog multiplexer, a sample-and-hold circuit, and a successive approximation register (SAR) ADC. The device supports both unipolar and bipolar conversion modes with software-programmable input configurations for differential or single-ended signals. It operates on a single +5V supply or dual ±5V supplies, drawing 6.0mA of current. The component features a full-duplex serial interface compatible with standard microprocessor ports, allowing configurable data word lengths of 8, 12, or 16 bits and MSB/LSB-first output sequences.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution: Provides 12-bit accuracy with guaranteed no missing codes across the operating temperature range.
• 8-Channel Multiplexer: Supports four differential pairs or eight single-ended inputs with an integrated sample-and-hold.
• Serial Interface: Full-duplex synchronous serial I/O allows direct connection to MPU serial or parallel ports.
• Software Programmability: Configurable for unipolar/bipolar operation, variable data word length (8/12/16 bits), and power shutdown mode.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring multi-channel signal acquisition.
• Data logging equipment for environmental or mechanical parameter monitoring.
• Microprocessor-based instrumentation interfaces.
• Battery-powered devices utilizing the power shutdown feature.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'IJ' corresponds to the 20-lead ceramic DIP package with an industrial temperature range (-40°C to 85°C). Confirm RoHS compliance status if required by assembly specifications. Check for obsolete package status as the datasheet notes the J package may be obsolete and suggests considering the N package as an alternate source.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-channel, 12-bit ADC with a built-in multiplexer is required in a ceramic DIP package. Ensure the application voltage does not exceed the absolute maximum ratings, particularly regarding overvoltage protection limits which require current limiting resistors. Verify that the serial clock frequency requirements align with the 2.0 MHz SCLK limit at VCC = 5V.

Analog To Digital Converters (ADC) Part Context

The LTC1290 belongs to the Linear Technology (now Analog Devices) family of single-chip data acquisition systems. The BIJ designation indicates the B grade performance within the industrial temperature range (-40°C to 85°C) housed in a 20-lead ceramic dual in-line package. This part is functionally similar to other variants like the LTC1293 but offers distinct channel counts and pinout configurations.

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet explicitly recommends considering the N Package (LTC1290BIN) as an alternate source due to the potential obsolescence of the J Package. No other cross-model substitutes are verified in the provided documentation.