LTC6912IGN-2#TRPBF

Overview

The LTC6912IGN-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 both channels. The device supports voltage gains of 0, 1, 2, 4, 8, 16, 32, and 64 V/V with all gains being inverting. It operates on single or split 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 maximum, and an input noise density of 12.6nV/√Hz at high gains.

Feature Summary

• Dual matched amplifiers with rail-to-rail input and output capabilities
• Independent digital gain programming via 3-wire SPI interface
• Internal half-supply reference generation for single supply operation
• Low power hardware shutdown capability

Applications

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

Procurement Notes

Verify that the specific suffix #TRPBF corresponds to tape and reel packaging as indicated by manufacturer ordering options. Confirm the IGN-2 designation matches the required industrial temperature grade (-40°C to 85°C) and the -2 variant gain settings. Ensure compatibility with the target PCB footprint for the SSOP-16 package before finalizing procurement.

Selection Notes

Select this component when dual-channel signal conditioning with precise digital gain control is required. The -2 variant provides binary-weighted gains suitable for logarithmic response applications. Consider the rail-to-rail performance and low noise specifications for sensitive sensor interfaces. Verify that the 3-wire SPI interface aligns with the host microcontroller's available communication ports.

Part Context

This part belongs to the LTC6912 family of dual programmable gain amplifiers. The IGN-2 suffix indicates the Industrial temperature grade and the specific gain ladder configuration. The #TRPBF suffix denotes lead-free tape and reel packaging. This series is designed for compact designs requiring minimal PC board space while maintaining high precision and low noise performance.

Replacement Considerations

LTC6912CGN-2#TRPBF: Same function with Commercial temperature grade (0°C to 70°C).

FAQ

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

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

Does the LTC6912 support single supply operation?

Yes, it operates from single or split supplies from 2.7V to 10.5V total, utilizing an internal half-supply reference at the AGND pin.

Is the gain adjustment inverting or non-inverting?

All voltage gains provided by the LTC6912 are inverting.