LTC1294BCSW#TRPBF

ADCs/DACs - Special Purpose Overview

The LTC1294BCSW#TRPBF is a single-chip 12-bit data acquisition system manufactured by Analog Devices Inc. It integrates an 8-channel analog multiplexer, a successive approximation A/D converter, and a built-in sample-and-hold circuit using LTCMOS switched capacitor technology. The device supports unipolar or bipolar conversions with a maximum throughput rate of 46.5 kS/s. It operates on a single +5V supply or ±5V supplies and features a direct four-wire serial interface compatible with most microprocessor ports. Key electrical parameters include a typical positive supply current of 6 mA, offset error of ±3 LSB, and integral nonlinearity of ±0.5 LSB.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 8-channel analog multiplexer with built-in sample-and-hold for all single-ended inputs
• Software-programmable for unipolar/bipolar conversion, differential/single-ended inputs, and MSB/LSB data sequence
• Direct 4-wire serial interface to MPU serial or parallel ports without external hardware
• Low power consumption with system shutdown capability reducing supply current to approximately 50 µA

ADCs/DACs - Special Purpose Applications

• 12-bit data acquisition systems requiring multi-channel signal conditioning
• Strain gauge bridge measurements and industrial sensor interfaces
• Microprocessor-based monitoring systems with low power requirements
• Portable instrumentation powered by single 5V supplies

ADCs/DACs - Special Purpose Procurement Notes

Verify the component matches the specific package type (SOIC-20 Wide) and temperature grade (Commercial, 0°C to 70°C). Confirm that the ordering suffix #TRPBF indicates tape and reel packaging. Ensure the design accounts for the external reference voltage requirement, as the device does not contain an internal reference generator. Cross-check pinout compatibility if replacing older variants in existing PCB layouts.

ADCs/DACs - Special Purpose Selection Notes

Select this model when eight analog input channels are required within a single IC footprint. Choose the BC suffix for commercial temperature range applications. Consider the LTC1296 variant if a System Shutdown Output (SSO) pin is needed to control external circuitry power states. Ensure the microprocessor interface supports the synchronous half-duplex serial protocol or can emulate it via parallel GPIO lines.

ADCs/DACs - Special Purpose Part Context

This part belongs to the LTC1293/LTC1294/LTC1296 family of single-chip 12-bit data acquisition systems. The LTC1294 specifically provides eight input channels, distinguishing it from the six-channel LTC1293 and the eight-channel LTC1296 which includes an additional System Shutdown Output pin. All variants share identical core ADC performance and interface protocols.

ADCs/DACs - Special Purpose Replacement Considerations

The LTC1294CCSW and LTC1294DCSW are direct functional replacements differing only in temperature range specifications. The LTC1293 offers similar functionality but with only six input channels. The LTC1296 is interchangeable electrically but includes an extra SSO pin; verify pinout alignment if substituting into a fixed footprint.