Analog Devices Inc. LTC6079HGN#PBF

Overview

LTC6079HGN#PBF from Analog Devices (formerly Linear Technology) is a quad micropower precision CMOS operational amplifier with rail-to-rail input/output swing, 25µV max offset voltage at 25°C, 0.7µV/°C max offset drift, and 54µA per amplifier supply current at 3V - designed for high-impedance sensor signal conditioning in battery-powered instrumentation operating from –40°C to 125°C.

For engineers reviewing the LTC6079HGN#PBF datasheet, LTC6079HGN#PBF pinout, LTC6079HGN#PBF application, or LTC6079HGN#PBF equivalent, key selection criteria include guaranteed high-temperature performance (–40°C to 125°C), sub-1pA input bias at 25°C, 95dB min CMRR, 16nV/√Hz input noise density, and compatibility with 2.7V–5.5V single-supply systems requiring microvolt-level DC accuracy.

Technical Context

The LTC6079HGN#PBF employs complementary PMOS/NMOS input stages to achieve true rail-to-rail common-mode input range (V– to V+), enabling direct interfacing with low-voltage sensors and ADC references. Its micropower architecture maintains precision via laser-trimmed input offset and ultra-low input bias current without sacrificing stability into capacitive loads up to 200pF.

Each of its four amplifiers operates independently with shutdown control available only on DFN-package variants - not implemented in the GN (SSOP) package. The device features 115dB large-signal voltage gain and 420kHz gain-bandwidth product under 100kΩ load, optimized for low-frequency precision applications rather than high-speed signal processing.

Key Specifications

Pinout & Package

Package: 16-lead plastic SSOP (GN), 0.150-inch narrow body, exposed pad connected to V–, rated for 150°C junction temperature.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op amp applications.

Compared with LTC6079IGN, the LTC6079HGN#PBF adds guaranteed 125°C operation and tighter thermal drift control; versus LT6012HMS8#PBF, it delivers 2.5× lower supply current and 300× lower input bias at the expense of bandwidth - making it optimal for static or low-frequency DC precision where power and impedance dominate.

Availability

LTC6079HGN#PBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor nodes, and medical diagnostics equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6079HGN#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio with rigorous automotive and industrial qualification standards.

The LTC6079HGN#PBF belongs to Linear's micropower precision op amp family, engineered specifically for ultra-low-power, high-accuracy signal conditioning in battery-operated test equipment and environmental monitoring systems.

FAQ

What is the maximum operating temperature range for the LTC6079HGN#PBF?

The LTC6079HGN#PBF is specified for continuous operation from –40°C to 125°C, with all key parameters including offset voltage, drift, and CMRR guaranteed across this full industrial-plus range. This rating applies specifically to the H-grade GN package variant and is validated per Linear Technology's datasheet revision 60789fa.

Does the LTC6079HGN#PBF include shutdown functionality?

No, the LTC6079HGN#PBF does not implement shutdown control. Shutdown pins (SHDN_A/SHDN_B) are only present on the DFN-package variants (e.g., LTC6079HDC#PBF); the GN (SSOP) package has no dedicated shutdown terminals, and all four amplifiers remain active whenever powered within the 2.7V–5.5V supply range.

What is the input bias current specification for the LTC6079HGN#PBF at 125°C?

At ≤85°C, the LTC6079HGN#PBF guarantees ≤50pA input bias current; at 125°C, the datasheet specifies ≤350pA maximum. This elevated bias at high temperature remains sufficiently low to support high-impedance sensor interfaces such as thermistors and unbuffered pH electrodes without significant error contribution.

Can the LTC6079HGN#PBF drive a 1000pF capacitive load?

No, the LTC6079HGN#PBF is characterized to drive up to 200pF in unity-gain configuration. Driving 1000pF would cause instability and excessive overshoot. For larger capacitive loads, a small series resistor (e.g., 10–50Ω) between the output and load restores stability, or a higher-gain configuration (AV ≥ 10) improves phase margin per the datasheet's "Overshoot vs CL" curve (Figure G20).

Is the exposed pad on the LTC6079HGN#PBF internally connected, and how should it be handled on the PCB?

Yes, the exposed pad on the LTC6079HGN#PBF is internally connected to the V– (negative supply) pin. It must be soldered to a PCB copper pour tied directly to the V– net - not left floating or connected to ground unless V– = GND. Proper thermal and electrical connection ensures 150°C junction temperature compliance and optimal noise performance.