LTC6912IDE-2#TRPBF

Overview

The LTC6912IDE-2#TRPBF is a dual-channel, low-noise, digitally programmable gain amplifier (PGA) from Analog Devices. It features independent gain control via a 3-wire SPI interface for gains of 0, 1, 2, 4, 8, 16, 32, and 64 V/V. The device operates on single or dual supplies ranging from 2.7V to 10.5V total. Key electrical characteristics include a maximum offset voltage of 2mV over the temperature range, channel-to-channel gain matching of 0.1dB max, and a typical input noise density of 12.6nV/√Hz at high gains. It offers rail-to-rail input and output swing capabilities.

Feature Summary

• Digitally programmable voltage gains controlled via a standard 3-wire serial interface
• Rail-to-rail input and output signal swing capabilities
• Low power hardware shutdown mode available in specific package variants
• High channel-to-channel isolation suitable for multiplexing applications

Applications

• Data acquisition systems requiring dynamic gain adjustment
• Automatic ranging circuits for sensor signal conditioning
• Automatic gain control loops in measurement instrumentation

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the 'I' grade designation matches the specified operating temperature range of –40°C to 85°C for your application environment. Ensure compatibility with the DFN-12 surface mount footprint during PCB layout verification.

Selection Notes

Select this model when precise digital gain control is required for dual-channel signals without external resistor networks. The LTC6912-2 variant provides binary-weighted gains up to 64 V/V, differing from the LTC6912-1 which supports higher linear gains. Consider the DFN-12 package constraints regarding thermal dissipation and exposed pad soldering requirements for reliable operation.

Part Context

This component belongs to the LTC6912 family of dual programmable gain amplifiers. It shares architectural similarities with other members like the LTC6912IDE-1 but differs in available gain steps. The device integrates internal reference generation to facilitate single-supply operation, reducing external component count compared to discrete amplifier solutions.

Replacement Considerations

LTC6912IDE-2#PBF is the tube-packaged equivalent of this part number.