Analog Devices Inc. LT6014ACS8#PBF

Overview

LT6014ACS8#PBF from Analog Devices (formerly Linear Technology) is a dual precision rail-to-rail output operational amplifier optimized for low-noise, micro-power sensor interface applications. It delivers 9.5nV/√Hz input voltage noise at 1kHz, 145µA per amplifier supply current, and guaranteed stability at gain ≥5 - enabling high-accuracy signal conditioning in battery-powered instrumentation and thermocouple amplifiers.

For engineers reviewing the LT6014ACS8#PBF datasheet, LT6014ACS8#PBF pinout, LT6014ACS8#PBF application, or LT6014ACS8#PBF equivalent, key selection criteria include its 35µV max input offset voltage (A-grade), 0.8µV/°C max VOS drift, ±18V supply range, SO-8 package compatibility, and non-unity-gain-stable architecture requiring AV ≥5.

Technical Context

The LT6014ACS8#PBF integrates two matched precision op amps in a single SO-8 package, each featuring a decompensated internal architecture that ensures stability only at closed-loop gains of 5 or higher. Its input stage uses on-chip bias current cancellation to achieve ≤250pA max input bias current while maintaining low 1/f noise (200nVP-P, 0.1Hz–10Hz).

It supports rail-to-rail output swing within 40mV of either supply rail under no-load conditions and drives up to 500pF capacitive loads at AV = 5. Input common-mode range is limited to V– + 1V to V+ – 1.2V, and absolute maximum total supply voltage is 40V.

Key Specifications

Pinout & Package

LT6014ACS8#PBF is housed in an 8-lead plastic SO (Small Outline) package (S8), with exposed pad connected to V–. Pin 1 is marked by a dot or notch; the device is not pin-compatible with unity-gain stable op amps.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT6014CS8#PBF, the LT6014ACS8#PBF offers tighter initial offset for uncalibrated systems; compared with LT6014AIS8#PBF, it trades extended temperature rating for lower cost in commercial-grade applications.

Availability

LT6014ACS8#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, precision photodiode interfaces, and micro-power sensor signal chains requiring stable component supply, long-term production continuity, and traceable sourcing.

Supply support for LT6014ACS8#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 full product support, manufacturing, and documentation for legacy Linear op amps including the LT6014 family.

The LT6014 belongs to Linear's precision low-noise op amp product line, designed specifically for high-accuracy, low-power analog signal conditioning in instrumentation, medical, and industrial sensing applications.

FAQ

Is LT6014ACS8#PBF unity-gain stable?

No, the LT6014ACS8#PBF is intentionally decompensated for optimal noise and bandwidth and is only stable at closed-loop gains of 5 or greater. Using it at unity gain or AV < 5 risks oscillation. For unity-gain applications, consider the LT6011 or LT6012 - the unity-gain stable counterparts in the same family. Always verify stability with simulation or bench testing when using the LT6014ACS8#PBF in custom gain configurations.

What is the maximum capacitive load the LT6014ACS8#PBF can drive?

The LT6014ACS8#PBF can reliably drive up to 500pF capacitive loads when configured with a minimum gain of 5. Driving larger capacitances requires either increasing the closed-loop gain or adding a small series resistor (e.g., 10–50Ω) between the output and the load to isolate the capacitance. Exceeding these limits may cause peaking or instability, especially near the 1.4MHz GBW. The LT6014ACS8#PBF datasheet provides detailed stability guidelines for various CLOAD and gain combinations.

Does LT6014ACS8#PBF support single-supply operation?

Yes, the LT6014ACS8#PBF operates from a single supply as low as 2.7V up to 36V, making it suitable for battery-powered and low-voltage industrial systems. Its rail-to-rail output swings within 40mV of both rails, and its input common-mode range extends from V– + 1V to V+ – 1.2V. When used in single-supply mode, ensure the input signal remains within this valid common-mode window and provide appropriate biasing for AC-coupled inputs. The LT6014ACS8#PBF maintains full specification compliance across this supply range.

How does the input bias current matching of LT6014ACS8#PBF benefit instrumentation designs?

The LT6014ACS8#PBF guarantees input bias current match (ΔIB) ≤800pA over 0°C to 70°C for the A-grade version, enabling highly accurate differential and instrumentation amplifier topologies. This tight matching minimizes offset errors caused by resistor imbalance in gain-setting networks - critical when using high-value feedback resistors (>100kΩ) or when building discrete IA front-ends. In practice, this allows designers to achieve <1µV of additional offset contribution from bias current mismatch, preserving the LT6014ACS8#PBF's 35µV VOS advantage in precision measurement systems.

Can LT6014ACS8#PBF be used with ±15V supplies?

Yes, the LT6014ACS8#PBF is fully specified for operation with ±15V split supplies, delivering 120dB minimum open-loop voltage gain, 1.4MHz GBW, and rail-to-rail output swing. Its PSRR exceeds 112dB and CMRR ≥107dB under these conditions, ensuring robust performance in traditional industrial control and test equipment. The device draws 200–250µA per amplifier at ±15V, and all key parameters - including noise, offset, and drift - are characterized across the full –40°C to 85°C temperature range under split-supply conditions. The LT6014ACS8#PBF maintains consistent behavior whether powered from single or dual rails.