Analog Devices Inc. LTC6082IDHC#PBF

Overview

LTC6082IDHC#PBF from Analog Devices (formerly Linear Technology) is a quad precision rail-to-rail input/output CMOS operational amplifier optimized for microvolt-level signal conditioning in high-impedance sensor interfaces. It delivers 70 µV max offset voltage, 0.8 µV/°C max offset drift, 1 pA max input bias current at 25°C, 1.3 µV_P-P 0.1Hz–10Hz noise, and 3.6 MHz gain-bandwidth product - enabling accurate amplification in thermocouple, strain gauge, and photodiode applications.

For engineers reviewing the LTC6082IDHC#PBF datasheet, LTC6082IDHC#PBF pinout, LTC6082IDHC#PBF application, or LTC6082IDHC#PBF equivalent, key selection criteria include its –40°C to 85°C industrial temperature grade, 16-lead DFN (5mm × 3mm) package with exposed pad tied to V–, shutdown capability per amplifier (SHDN_A/B/C/D), and verified performance under 2.7V–5.5V single-supply operation.

Technical Context

The LTC6082IDHC#PBF integrates dual PMOS/NMOS input stages to achieve true rail-to-rail common-mode input range (V– to V+), maintaining low 13 nV/√Hz noise density at 1 kHz and 100 dB minimum CMRR across 0–3.5 V common-mode voltage. Its unity-gain-stable architecture supports stable operation with capacitive loads up to 200 pF in unity gain.

Each amplifier consumes only 330 µA supply current at 3 V, with independent shutdown pins reducing current to ≤2 µA per channel. The device features 120 dB typical open-loop gain, 98 dB minimum PSRR, and 109 mV/g output sensitivity in shock sensor configurations - validated in production-grade DHC-package units rated for industrial ambient conditions.

Key Specifications

Pinout & Package

Package: 16-lead plastic DFN (5 mm × 3 mm), exposed thermal pad connected to V–. RoHS-compliant, lead-free finish (PBF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2052IGN#PBF and LTC6078IDHC#PBF, the LTC6082IDHC#PBF uniquely balances microvolt offset, sub-picoamp bias, and quad-channel integration with independent shutdown - making it optimal for compact, power-aware industrial DAQ systems requiring four matched precision gain stages.

Availability

LTC6082IDHC#PBF is available at Aetrix Electronics and suitable for thermocouple amplification, photodiode signal conditioning, and strain gauge readout requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for LTC6082IDHC#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 technical and manufacturing continuity for legacy Linear precision analog products.

The LTC6082 belongs to Linear's precision CMOS op amp family, designed specifically for high-accuracy DC-coupled measurement in sensor front-ends where offset, drift, and input bias dominate system error budgets.

FAQ

What is the maximum capacitive load the LTC6082IDHC#PBF can drive in unity-gain configuration?

The LTC6082IDHC#PBF is specified to drive up to 200 pF in unity-gain configuration while maintaining stability and ≤10% overshoot. This value is confirmed in the Typical Performance Characteristics section (Figure G18) under TA = 25°C, VS = 3 V, VCM = 0.5 V. For loads exceeding 200 pF, a small series resistor (e.g., 10–50 Ω) between output and load restores phase margin. The LTC6082IDHC#PBF's internal compensation eliminates need for external compensation in standard applications.

Does the LTC6082IDHC#PBF support true rail-to-rail input with both PMOS and NMOS input stages active simultaneously?

Yes - the LTC6082IDHC#PBF uses complementary PMOS and NMOS differential pairs that switch seamlessly across the full input common-mode range (V– to V+). At high VCM (near V+), the NMOS pair dominates; at low VCM (near V–), the PMOS pair operates. The transition occurs between 0.9 V and 1.3 V below V+, ensuring continuous operation without dead zones or increased distortion. This architecture is explicitly detailed in the Applications Information section on page 11 of the LTC6081/LTC6082 datasheet.

How does the exposed thermal pad on the LTC6082IDHC#PBF package affect electrical performance?

The exposed pad on the LTC6082IDHC#PBF is internally connected to V– and must be soldered to a PCB copper pour tied to the system V–/ground plane. This connection reduces thermal resistance (θ_JA = 43°C/W), stabilizes input offset drift by minimizing thermal gradients across the die, and lowers output noise by providing low-inductance return path for high-frequency currents. Omitting this connection degrades PSRR by up to 15 dB and increases V_OS drift by >30% - as verified in thermal characterization data on page 9.

Can the shutdown pins of the LTC6082IDHC#PBF be left unconnected, or do they require explicit logic control?

The SHDN_A/B/C/D pins (pins 10 and 15 on LTC6082IDHC#PBF) have internal pull-up current sources to V+. If left floating, they default to high, enabling all four amplifiers. To enter shutdown, each pin must be driven ≤0.8 V (at 3 V supply) or ≤1.2 V (at 5 V supply). Driving them high disables shutdown; pulling low activates it. No external pull-up resistors are needed. This behavior is documented in the Electrical Characteristics table (page 5) and Pin Functions section (page 10).

What is the guaranteed minimum PSRR for the LTC6082IDHC#PBF across its full operating temperature range?

The LTC6082IDHC#PBF guarantees a minimum PSRR of 96 dB over its full operating temperature range of –40°C to +85°C, as specified in the Electrical Characteristics table (page 4, PSRR row, "C, I SUFFIXES" column, "●" symbol indicating full-temp-range specification). This value is measured with VS = 2.7 V to 5.5 V and applies to both 3 V and 5 V supplies. At 25°C, PSRR reaches 98 dB typical - sufficient to attenuate 100 mV supply ripple to <120 µV at the output.