LTC6912CDE-2

Overview

The LTC6912CDE-2 is a dual-channel, low-noise, digitally programmable gain amplifier (PGA) from Analog Devices. It features independent gain control for two channels via a 3-wire SPI interface. The device supports voltage gains of 0, 1, 2, 4, 8, 16, 32, and 64 V/V. It 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 rail-to-rail input and output swing capabilities.

Feature Summary

• Digitally programmable gain amplifiers with independent channel control via a serial digital interface
• Rail-to-rail input and output signal processing capabilities
• Low power hardware shutdown functionality available in specific package variants
• Wired-OR outputs enabling analog multiplexing functions

Applications

• Data acquisition systems
• Automatic gain control circuits
• Dynamic gain changing applications
• Automatic ranging circuits

Procurement Notes

Verify the specific suffix codes against official documentation to confirm operating temperature ranges and package types. Ensure compatibility with system supply voltages and SPI timing requirements before integration. Confirm RoHS compliance status through manufacturer datasheets.

Selection Notes

Select this component for applications requiring precise, digitally adjustable gain in a compact form factor. Consider the -2 suffix for binary-weighted gain steps versus the -1 variant for linear steps. Evaluate thermal performance within the DFN-12 package constraints for high-gain settings.

Part Context

This part belongs to the LTC6912 family of dual programmable gain amplifiers. It is designed for precision signal conditioning where digital control of analog gain is necessary. The device integrates internal references and logic to simplify system design compared to discrete solutions.

Replacement Considerations

LTC6912CDE-1 offers different gain steps (0, 1, 2, 5, 10, 20, 50, 100 V/V). Verify gain step requirements when substituting between -1 and -2 suffixes.

FAQ

What are the available voltage gain settings for the LTC6912-2?

The LTC6912-2 provides voltage gains of 0, 1, 2, 4, 8, 16, 32, and 64 V/V.

Does the LTC6912 support rail-to-rail operation?

Yes, the device features both rail-to-rail input and rail-to-rail output swing capabilities.

How is the gain programmed?

Gain is set independently for each channel using a 3-wire SPI interface.