LTC6912CGN-1#PBF

Overview

The LTC6912CGN-1#PBF 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. Key electrical specifications include a maximum offset voltage of 2mV over the operating temperature range, channel-to-channel gain matching of 0.1dB maximum, and an input noise density of 12.6nV/√Hz. It provides rail-to-rail input and output swing capabilities.

Feature Summary

• Dual matched amplifiers with independent digital gain programming via a 3-wire serial interface
• Rail-to-rail input and output signal processing capabilities
• Internal half-supply reference generation at the AGND pin for single supply operation
• Low power hardware shutdown mode available in the GN package

Applications

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

Procurement Notes

Verify that the specific part number includes the #PBF suffix to ensure compliance with lead-free manufacturing standards. Confirm the package type corresponds to the 16-lead narrow plastic SSOP format designated by the GN suffix. Ensure the ordering suffix matches the required temperature grade and gain configuration variant for your design requirements.

Selection Notes

Select this component when precise, digitally adjustable gain settings are required for dual-channel signal conditioning. The LTC6912-1 variant offers higher maximum gain steps compared to the -2 version. Consider the rail-to-rail performance and low noise characteristics for high-fidelity analog front-end designs. Verify that the system can accommodate the 3-wire SPI communication protocol for gain configuration.

Part Context

This component belongs to the LTC6912 family of dual programmable gain amplifiers. The CGN-1 designation indicates the commercial temperature grade, the SSOP-16 package, and the specific gain ladder configuration (-1). The family is designed to occupy minimal PCB space while providing flexible gain control for precision measurement applications.

Replacement Considerations

Public confirmed substitute part numbers: LTC6912IGN-1#PBF, LTC6912HGN-1#PBF.