LTC6912CGN-1#TRPBF

Overview

The LTC6912CGN-1#TRPBF is a dual-channel, low-noise, digitally programmable gain amplifier (PGA) from Analog Devices Inc. It features independent gain control for both channels via a 3-wire SPI interface, supporting voltage gains of 0, 1, 2, 5, 10, 20, 50, and 100V/V. The device operates on single or split supplies ranging from 2.7V to 10.5V total. It offers rail-to-rail input and output capabilities, with an internal half-supply reference at the AGND pin for single-supply applications. The component is housed in a 16-lead narrow plastic SSOP package.

Feature Summary

• Dual matched amplifiers with independent digital gain programming
• Rail-to-rail input and output signal processing
• Low power hardware shutdown capability
• Wired-OR outputs enabling analog multiplexing functions

Applications

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

Procurement Notes

Verify that the ordering suffix #TRPBF confirms lead-free tape and reel packaging. Confirm the GN-16 package designation matches the required 16-lead SSOP form factor. Ensure the C temperature grade specification aligns with the intended operating environment requirements.

Selection Notes

Select this part when dual-channel PGA functionality with serial digital control is required. The -1 suffix indicates specific gain steps up to 100V/V. Verify compatibility with the host microcontroller's SPI timing parameters. Consider the 16-pin SSOP package constraints for PCB layout and thermal management.

Part Context

This component belongs to the LTC6912 family of dual programmable gain amplifiers. It shares core architecture with variants like the LTC6912CGN-2, which offers different gain steps. The CGN-1 variant specifically targets applications requiring higher maximum voltage gains compared to other series members.

FAQ

How are the gain settings programmed?

Gain settings are independently programmed for each channel using a 3-wire SPI interface.

What is the function of the SHDN pin?

The SHDN pin enables low power hardware shutdown, reducing supply current significantly when activated.