Analog Devices Inc. LTC6912CGN-1#TRPBF

Overview

LTC6912CGN-1#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, digitally programmable gain amplifier (PGA) with independent 3-wire SPI-controlled gain settings of 0, 1, 2, 5, 10, 20, 50, or 100 V/V per channel, rail-to-rail input/output operation, 2 mV max offset voltage over –40°C to 85°C, and 0.1 dB max channel-to-channel gain matching - used in precision data acquisition systems requiring dynamic range optimization and automatic gain control.

For engineers reviewing the LTC6912CGN-1#TRPBF datasheet, LTC6912CGN-1#TRPBF pinout, LTC6912CGN-1#TRPBF application, or LTC6912CGN-1#TRPBF equivalent, key selection criteria include guaranteed gain accuracy across temperature, low 12.6 nV/√Hz input noise at high gains, hardware shutdown capability (2 µA max), 16-pin SSOP package compatibility, and dual-channel isolation >89 dB at 200 kHz.

Technical Context

The LTC6912CGN-1#TRPBF implements two matched, inverting amplifiers with internal AGND reference generation for single-supply operation, supporting supply voltages from 2.7 V to 10.5 V total. Its 3-wire SPI interface enables independent per-channel gain configuration without external components.

Each channel features programmable gain states via 4-bit digital word (0000–0111), with state 1000 enabling software shutdown and wired-OR output capability allowing analog multiplexing. Gain-bandwidth product reaches 50 MHz at G = 100, and channel-to-channel isolation remains ≥89 dB up to 200 kHz under ±5 V supplies.

Key Specifications

Pinout & Package

Package: 16-lead narrow plastic SSOP (GN-16), 1.2 mm height, exposed pad not present. Pinout validated per Linear Technology LTC6912 datasheet (6912fa, Rev. C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual programmable gain amplifier applications.

Compared with AD8253ARMZ, LTC6912CGN-1#TRPBF delivers true dual-channel integration and hardware shutdown in one GN-16 package; versus LTC6915IG#PBF, it provides 100× gain and tighter channel matching but trades off slightly higher noise at G = 64.

Availability

LTC6912CGN-1#TRPBF is available at Aetrix Electronics and suitable for data acquisition systems, automatic gain control loops, and instrumentation-grade analog front-ends requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LTC6912CGN-1#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.

The LTC6912 family was designed specifically for precision, low-noise, digitally controlled analog signal conditioning - targeting applications where dynamic gain adjustment, channel matching, and rail-to-rail operation are mandatory.

FAQ

What gain settings does the LTC6912CGN-1#TRPBF support?

The LTC6912CGN-1#TRPBF supports eight discrete gain settings per channel: 0, 1, 2, 5, 10, 20, 50, and 100 V/V, programmed independently via its 3-wire SPI interface. Gain state 0 provides >120 dB attenuation, and all gains are inverting. These values are confirmed across –40°C to 85°C for the C-grade device and match Table 1 in the official datasheet (6912fa).

Does the LTC6912CGN-1#TRPBF support single-supply operation?

Yes, the LTC6912CGN-1#TRPBF supports true single-supply operation from 2.7 V to 10.5 V total. Its internal AGND pin generates a precise half-supply reference, enabling rail-to-rail input and output swing without external biasing components - verified in the "Description" section and Figure 1 of the LTC6912 datasheet.

What is the purpose of the SHDN pin on the LTC6912CGN-1#TRPBF?

The SHDN (pin 5) on the LTC6912CGN-1#TRPBF enables hardware-initiated low-power shutdown, reducing total supply current to ≤2 µA at 2.7 V. This feature is exclusive to GN-16 packaged variants (including LTC6912CGN-1#TRPBF) and is specified in the Absolute Maximum Ratings and Electrical Characteristics tables of the datasheet.

How does channel-to-channel isolation perform on the LTC6912CGN-1#TRPBF?

Channel-to-channel isolation on the LTC6912CGN-1#TRPBF is ≥89 dB at 200 kHz when configured at G = 100, ≥108 dB at G = 10, and ≥113 dB at G = 1 (VS = 5 V). These values are measured with one channel driven and the other's input tied to AGND, and are explicitly listed in the Electrical Characteristics table (page 6, Note 7) of the LTC6912 datasheet.

Is the LTC6912CGN-1#TRPBF pin-compatible with other LTC6912 variants?

Yes, the LTC6912CGN-1#TRPBF shares identical pinout and footprint with all GN-16 packaged LTC6912 variants (e.g., LTC6912IGN-1, LTC6912HGN-1, LTC6912CGN-2), including matching pin functions, spacing, and thermal pad absence. This compatibility is confirmed by the GN PACKAGE mechanical drawing (page 3) and ordering information table in the datasheet.