LTC1291BCJ8

ADCs/DACs - Special Purpose Overview

The LTC1291BCJ8 is a single-chip 12-bit data acquisition system featuring a successive approximation A/D converter and a two-channel analog multiplexer. It utilizes LTCMOS switched capacitor technology for unipolar conversion with an on-chip sample-and-hold on the positive input. The device operates from a single 5V supply, which also serves as the reference voltage. It supports serial I/O via a 3- or 4-wire interface compatible with most microprocessor ports. Packaged in an 8-lead ceramic DIP (J8), it includes power shutdown capabilities to minimize consumption during idle periods.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit resolution with 2-channel analog multiplexer supporting single-ended or differential inputs
• Serial interface requiring only 3 or 4 wires for direct connection to MPU ports
• Single 5V supply operation with VCC serving as the internal reference
• Power shutdown mode reducing supply current to 10µA maximum

ADCs/DACs - Special Purpose Applications

• Remote data acquisition systems requiring minimal interconnects
• Microprocessor-based industrial control loops
• Battery-powered instrumentation due to low power shutdown capability

ADCs/DACs - Special Purpose Procurement Notes

Verify package authenticity as the J8 ceramic DIP variant may be obsolete; consult manufacturer for current sourcing options or N8 plastic DIP alternatives. Confirm RoHS compliance status through official documentation prior to integration. Ensure supply voltage stability to maintain reference accuracy.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a compact 12-bit ADC with integrated multiplexing is required for single-supply applications. The J8 package is suitable for high-temperature environments compared to plastic variants. Ensure source impedance allows settling within the 2.5 CLK cycle sample time for accurate conversion results.

ADCs/DACs - Special Purpose Part Context

The LTC1291 belongs to the Linear Technology family of single-chip data acquisition systems. The BCJ8 suffix denotes the B grade performance specifications housed in an 8-lead ceramic dual in-line package. This part integrates functions typically requiring separate ADC, MUX, and S/H components into a single monolithic structure.

ADCs/DACs - Special Purpose Replacement Considerations

The datasheet explicitly recommends considering the N8 package (plastic DIP) as an alternate source if the J8 ceramic package is unavailable. Verify pin compatibility and thermal characteristics when substituting between package types.