LTC1294DCN#PBF

ADCs/DACs - Special Purpose Overview

The LTC1294DCN#PBF is a single-chip 12-bit data acquisition system manufactured by Analog Devices Inc. It integrates a successive approximation A/D converter, an analog multiplexer, and a sample-and-hold circuit using LTCMOS switched capacitor technology. The device supports up to eight single-ended or differential input channels and operates on a single +5V supply or ±5V supplies. It features a synchronous half-duplex serial interface compatible with most microprocessor ports, allowing data transmission over three wires. Key electrical specifications include a maximum throughput rate of 46.5 kS/s, a conversion time of 12µs, and a typical supply current of 6.0mA.

ADCs/DACs - Special Purpose Feature Summary

• 12-bit resolution with SAR architecture and 46.5kHz maximum sampling rate
• 8-channel analog multiplexer supporting single-ended or differential configurations
• Software programmable for unipolar/bipolar conversion and power shutdown modes
• Direct 4-wire serial interface (CS, CLK, DIN, DOUT) to microprocessors

ADCs/DACs - Special Purpose Applications

• Industrial process control systems requiring multi-channel data acquisition
• Battery-powered instrumentation utilizing the power shutdown feature
• Strain gauge bridge measurements with signal conditioning
• Microprocessor-based data logging systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type matches the design requirements; the 'N' suffix indicates a 20-lead PDIP package. Confirm the temperature grade corresponds to the application environment, as the 'D' suffix specifies the commercial range (0°C to 70°C). Ensure the ordering suffix '#PBF' is included to guarantee lead-free compliance and RoHS adherence according to manufacturer standards.

ADCs/DACs - Special Purpose Selection Notes

Select the LTC1294DCN#PBF when eight input channels are required, distinguishing it from the 6-channel LTC1293 and the SSO-equipped LTC1296. The 'DC' designation ensures operation within the commercial temperature range. Verify that the system clock frequency does not exceed 1MHz to maintain specified timing parameters and linearity performance.

ADCs/DACs - Special Purpose Part Context

This component belongs to the LTC1293/4/6 family of single-chip 12-bit data acquisition systems. While sharing core ADC functionality, the LTC1294 specifically provides eight analog inputs in a 20-lead PDIP package. It serves as a mid-range option between the six-channel LTC1293 and the eight-channel LTC1296, which adds a System Shutdown Output pin for external power management.

ADCs/DACs - Special Purpose Replacement Considerations

The LTC1294CCN#PBF offers identical functionality but operates across an extended industrial temperature range (-40°C to 85°C). For surface-mount applications, the LTC1294CCSW#PBF provides the same electrical characteristics in a 20-lead SOIC-W package.