LTC6912HGN-2#TRPBF

Overview

The LTC6912HGN-2#TRPBF 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 gains of 0, 1, 2, 4, 8, 16, 32, and 64 V/V with rail-to-rail input and output swing capabilities. It operates on single or dual supplies ranging from 2.7V to 10.5V total. Key electrical specifications include a maximum offset voltage of 3.5mV over the extended temperature range, a typical supply current of 3.0mA per channel at 5V, and a gain bandwidth product up to 50MHz.

Feature Summary

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

Applications

• Data acquisition systems requiring dynamic gain adjustment
• Automatic ranging circuits for sensor interfaces
• Automatic gain control loops in measurement equipment

Procurement Notes

Verify the H suffix indicates an extended operating temperature range of -40°C to 125°C. Confirm the GN-16 package designation corresponds to the narrow plastic SSOP form factor. Ensure the #TRPBF suffix denotes lead-free tape and reel packaging. Cross-reference the specific part number against the manufacturer's latest datasheet to confirm current production status and any potential product change notifications.

Selection Notes

Select this component when dual-channel precision amplification with digital control is required. The H grade provides extended temperature operation suitable for harsh environments. Verify that the 3-wire SPI interface timing requirements align with the host microcontroller. Consider the rail-to-rail output swing benefits for low-voltage single-supply applications compared to standard op-amps.

Part Context

This component belongs to the LTC6912 family of dual programmable gain amplifiers. The '2' suffix identifies the specific gain ladder configuration (powers of two). The 'H' grade extends the operational temperature range beyond standard industrial grades. The GN package offers a compact surface-mount solution for space-constrained PCB layouts.

Replacement Considerations

LTC6912IGN-2#TRPBF: Identical function with lower temperature rating (-40°C to 85°C).

FAQ

What is the maximum linear input range for the LTC6912HGN-2#TRPBF at Gain = 64?

At a gain of 64 V/V with a single 5V supply, the maximum linear input range is 0.078 V p-p.

How does the hardware shutdown function operate?

The SHDN pin allows for low-power hardware shutdown. When asserted, it reduces the supply current significantly, with a maximum draw of 10µA at 5V.