LTC6912HGN-2#PBF

Overview

The LTC6912HGN-2#PBF is a dual-channel, low-noise, digitally programmable gain amplifier (PGA) housed in a 16-lead narrow plastic SSOP package. It features independent gain control for each channel via a 3-wire SPI interface, supporting voltage gains of 0, 1, 2, 4, 8, 16, 32, and 64V/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 3.5mV over the extended temperature range of –40°C to 125°C, a typical input noise density of 12.6nV/√Hz at high gains, and rail-to-rail input and output capabilities.

Feature Summary

• Dual channels with independent digital gain programming via a 3-wire serial interface
• Rail-to-rail input and output signal swing capability
• Hardware shutdown pin for low power operation
• Internal half-supply reference generation for single supply applications

Applications

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

Procurement Notes

Verify the specific H grade designation ensures compliance with the extended operating temperature range of –40°C to 125°C. Confirm the GN-16 package suffix matches the required physical footprint and pinout configuration. Ensure the #PBF suffix indicates lead-free manufacturing status as specified by Analog Devices. Cross-reference the exact part number against current manufacturer documentation to confirm availability and revision status.

Selection Notes

Select this component when dual-channel signal conditioning with precise digital gain control is required. The H grade is necessary for environments exceeding standard industrial temperatures up to 125°C. Verify that the available gain steps (powers of two) align with system dynamic range requirements. Consider the rail-to-rail performance if interfacing with low-voltage ADCs or sensors without level shifting.

Part Context

This device belongs to the LTC6912 family of dual programmable gain amplifiers. The -2 suffix denotes the specific gain ladder configuration (0, 1, 2, 4, 8, 16, 32, 64V/V), distinguishing it from the -1 variant which offers different gain steps. The GN-16 package provides a compact surface-mount solution suitable for space-constrained PCB layouts.

Replacement Considerations

LTC6912CGN-2#PBF

FAQ

What is the difference between the LTC6912-1 and LTC6912-2 variants?

The LTC6912-1 supports voltage gains of 0, 1, 2, 5, 10, 20, 50, and 100V/V, while the LTC6912-2 supports gains of 0, 1, 2, 4, 8, 16, 32, and 64V/V.

Does the LTC6912 support single-supply operation?

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