Analog Devices Inc. LTC6911CMS-1#PBF

Overview

LTC6911CMS-1#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, inverting, digitally programmable gain amplifier (PGA) with 3-bit parallel gain control. It delivers inverting voltage gains of 0, 1, 2, 5, 10, 20, 50, and 100 V/V, features rail-to-rail input and output swing, 11 MHz gain-bandwidth product, and 0.1 dB max channel-to-channel gain matching - enabling precision signal conditioning in data acquisition systems requiring dynamic range up to 120 dB.

For engineers reviewing the LTC6911CMS-1#PBF datasheet, LTC6911CMS-1#PBF pinout, LTC6911CMS-1#PBF application, or LTC6911CMS-1#PBF equivalent, key selection considerations include its MSOP-10 package, single/dual supply operation (2.7V–10.5V), 10 nV/√Hz input noise density at gain = 1, ±2 mV input offset (gain = 10), and guaranteed performance over –40°C to 85°C for C-grade variants.

Technical Context

The LTC6911CMS-1#PBF integrates two matched MOS-input op amps with digitally controlled resistor arrays for precise inverting gain programming. Its internal AGND reference supports single-supply operation, and gain selection is implemented via three logic-level digital inputs (G0–G2) that configure feedback/input resistance ratios without external components.

Each channel operates independently with rail-to-rail input capability at unity gain and maintains high channel isolation (>108 dB at 200 kHz). The device uses a current-summing architecture where the INA/INB pins connect to programmable resistive dividers referenced to AGND - ensuring predictable gain accuracy, low temperature drift (e.g., –140 ppm/°C at G = 100), and minimal inter-channel crosstalk across all eight gain states.

Key Specifications

Pinout & Package

Package: 10-lead MSOP (3 mm × 3 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8251ARMZ and LTC6915IMS-1#PBF, the LTC6911CMS-1#PBF uniquely combines dual-channel matching, zero-gain muting, rail-to-rail input at unity gain, and 10 nV/√Hz noise - making it optimal for precision, low-power, space-constrained data acquisition where channel correlation and dynamic range are critical.

Availability

LTC6911CMS-1#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical instrumentation front-ends, automated test equipment, and programmable data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC6911CMS-1#PBF 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.

The LTC6911CMS-1#PBF belongs to ADI's precision signal conditioning portfolio, designed specifically for applications demanding matched dual-channel amplification, low-noise programmable gain, and seamless integration into compact, low-power data acquisition architectures.

FAQ

What gain options does the LTC6911CMS-1#PBF support?

The LTC6911CMS-1#PBF supports eight discrete inverting voltage gains: 0 (mute), 1, 2, 5, 10, 20, 50, and 100 V/V. These are selected via a 3-bit parallel digital interface (G0–G2) with no external components required. Gain states are fixed and calibrated - not adjustable via analog voltage or serial interface.

Does the LTC6911CMS-1#PBF support single-supply operation?

Yes, the LTC6911CMS-1#PBF supports true single-supply operation from 2.7V to 10.5V. Its internal AGND pin generates a stable mid-supply reference, serving as the DC common-mode point for both inputs and outputs - eliminating the need for external bias networks in 3.3V or 5V systems.

What is the maximum operating temperature for the LTC6911CMS-1#PBF?

The LTC6911CMS-1#PBF is rated for operation from –40°C to +85°C (C-grade). This specification is guaranteed across the full temperature range for parameters including gain accuracy, channel matching (≤0.1 dB), and PSRR (≥60 dB). It is not rated for extended industrial (–40°C to +125°C) operation - that requires the H-grade variant LTC6911HMS-1#PBF.

How does the zero-gain setting (G0=G1=G2=0) function in the LTC6911CMS-1#PBF?

In the zero-gain state, the LTC6911CMS-1#PBF internally disconnects both INA and INB inputs using analog switches and forces OUTA and OUTB to the AGND potential. Input pins remain high-impedance (>100 MΩ), allowing them to float or be driven without affecting output - enabling clean signal muting without loading downstream circuitry.

Is the LTC6911CMS-1#PBF pin-compatible with other members of the LTC6911 family?

Yes, all LTC6911-x variants (e.g., LTC6911CMS-2#PBF, LTC6911IMS-1#PBF) share identical MSOP-10 pinouts and electrical interfaces. The only functional differences are gain tables (–1 vs –2 option) and temperature grade (C/I/H). Swapping LTC6911CMS-1#PBF for LTC6911CMS-2#PBF requires firmware update to match the binary gain mapping (e.g., 111 = –64 V/V instead of –100 V/V).