Analog Devices Inc. LTC6081CDD#PBF

Overview

LTC6081CDD#PBF from Analog Devices (formerly Linear Technology) is a precision dual CMOS rail-to-rail input/output operational amplifier in a 10-lead DFN package, featuring 70 µV max offset voltage, 1 pA max input bias current at 25°C, 1.3 µV_P-P 0.1 Hz–10 Hz noise, 3.6 MHz gain-bandwidth product, and independent shutdown pins for each amplifier-designed for microvolt-level signal conditioning in high-impedance sensor interfaces.

For engineers reviewing the LTC6081CDD#PBF datasheet, LTC6081CDD#PBF pinout, LTC6081CDD#PBF application, or LTC6081CDD#PBF equivalent, this page delivers verified package mapping, validated pin functions, confirmed thermal and supply-voltage specifications (2.7 V to 5.5 V, 0°C to 70°C), and real-world application context for photodiode amplification, strain gauge front-ends, and thermocouple signal chains.

Technical Context

The LTC6081CDD#PBF integrates complementary PMOS/NMOS input stages to achieve true rail-to-rail common-mode input range (V_– to V₊) and output swing (within 1 mV of rails at light load), enabling operation with single-supply 3 V systems while maintaining 120 dB open-loop gain and 100 dB CMRR. Its dual-amplifier architecture includes dedicated SHDN_A and SHDN_B pins-active-low, internally pulled to V₊ when floating-reducing per-amplifier supply current to ≤2 µA in shutdown.

Designed for low-drift precision, it delivers ±0.2 µV/°C typical offset drift (±0.8 µV/°C max over temperature), 98 dB PSRR, and 13 nV/√Hz input voltage noise density at 1 kHz. The 10-lead DFN package features an exposed pad connected to V_–, supporting thermal dissipation critical for stable DC performance in instrumentation-grade layouts.

Key Specifications

Pinout & Package

Package: 10-lead (3 mm × 3 mm) plastic DFN with exposed pad connected to V_–. Thermal resistance θ_JA = 43°C/W; junction max = 125°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2051IMS8#PBF and OPA2189IDR, the LTC6081CDD#PBF uniquely balances ultra-low bias current, integrated shutdown, DFN thermal performance, and 0.1 Hz–10 Hz noise below 1.5 µV_P-P-making it optimal for battery-powered, high-precision sensor nodes where size, power, and low-frequency fidelity are co-constrained.

Availability

LTC6081CDD#PBF is available at Aetrix Electronics and suitable for photodiode amplification, strain gauge signal conditioning, and thermocouple measurement systems requiring stable component supply across commercial temperature grades and long production lifecycles.

Supply support for LTC6081CDD#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; Linear pioneered high-precision analog ICs with emphasis on low-noise, low-drift op-amps and references for instrumentation and medical applications.

The LTC6081 series belongs to Linear's precision CMOS op-amp product line, engineered specifically for microvolt-level DC accuracy in single-supply, high-impedance sensor interfaces-prioritizing offset, drift, and 1/f noise over speed or power efficiency.

FAQ

What is the maximum allowable capacitive load for LTC6081CDD#PBF in unity-gain configuration?

The LTC6081CDD#PBF drives up to 200 pF capacitive load stably in unity-gain configuration, as verified in the Typical Performance Characteristics section (Figure G18). Exceeding this requires a small series resistor (e.g., 10–50 Ω) between output and load to maintain phase margin above 70°.

Does LTC6081CDD#PBF support true rail-to-rail input with 3 V single supply?

Yes, LTC6081CDD#PBF supports rail-to-rail input common-mode range from V_– to V₊ under all supply conditions, including 3 V single supply. Its dual-input-stage architecture (PMOS + NMOS pairs) ensures continuous operation across the full range without phase reversal or increased distortion near supply rails.

How does the shutdown functionality work on LTC6081CDD#PBF?

LTC6081CDD#PBF provides two independent active-low shutdown pins: SHDN_A (Pin 6) and SHDN_B (Pin 5). When pulled ≤0.8 V, each pin places its respective amplifier into high-impedance output state and reduces supply current to ≤2 µA. Pins float high via internal current sources, so amplifiers operate normally when unconnected.

Is the exposed pad on LTC6081CDD#PBF electrically connected, and how should it be handled?

Yes, the exposed pad on LTC6081CDD#PBF is electrically connected to V_– and must be soldered to a PCB copper pour tied to the negative supply plane. This connection is essential for thermal dissipation (θ_JA = 43°C/W) and noise immunity-floating or isolated pads cause junction temperature rise and degraded PSRR.

What is the guaranteed input offset voltage drift specification for LTC6081CDD#PBF over its operating temperature range?

LTC6081CDD#PBF guarantees input offset voltage drift of ±0.8 µV/°C maximum over its specified operating temperature range of 0°C to 70°C, as documented in the Electrical Characteristics table (Note 5). Typical performance is ±0.2 µV/°C, confirmed by histogram data in Figure G01.