Analog Devices Inc. LT6005IDHC#PBF

Overview

LT6005IDHC#PBF from Analog Devices (formerly Linear Technology) is a quad rail-to-rail input/output precision operational amplifier optimized for micropower battery-powered systems. It operates from 1.6V to 16V supply, draws ≤1.6µA per amplifier at 5V, features 500µV max input offset voltage (–40°C to 85°C), 90pA max input bias current, and drives 500pF capacitive loads - enabling high-accuracy signal conditioning in portable gas monitors and low-voltage sensor front-ends.

For engineers reviewing the LT6005IDHC#PBF datasheet, LT6005IDHC#PBF pinout, LT6005IDHC#PBF application, or LT6005IDHC#PBF equivalent, key selection criteria include guaranteed industrial-temperature performance (–40°C to 85°C), 16-pin DFN package with exposed V– pad, rail-to-rail I/O swing within 100mV of rails, and ultralow quiescent current stability across 1.6V–16V supply range.

Technical Context

The LT6005IDHC#PBF employs a dual-input-stage architecture: a PNP pair active from V– to ~0.9V below V+, and an NPN pair active near V+, enabling true rail-to-rail common-mode input range. Its folded-cascode second stage and complementary drive output stage ensure rail-to-rail output swing while maintaining stability with ≥500pF capacitive loads.

Input offset voltage is trimmed on both input stages to limit CMRR-induced shift to ≤1.3mV over full common-mode range; PSRR (95dB) and CMRR (100dB) are specified at 1.8V/5V/±8V supplies, supporting operation in noisy, single-supply, or split-supply embedded sensor nodes without external regulation.

Key Specifications

Pinout & Package

LT6005IDHC#PBF is housed in a 16-lead (5mm × 3mm) plastic DFN package with exposed thermal pad connected to V–. The package supports reflow soldering and provides θ_JA = 160°C/W with optional PCB connection of the exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2050CDD#PBF and OPA333AIDR, LT6005IDHC#PBF uniquely balances nanopower operation (≤1.6µA), quad integration, and 500µV offset - making it the only viable solution for space-constrained, multi-channel, decade-long battery-powered sensor nodes requiring rail-to-rail I/O.

Availability

LT6005IDHC#PBF is available at Aetrix Electronics and suitable for portable gas monitors, battery-powered environmental sensors, and micropower active filters requiring stable component supply across automotive, industrial, and medical OEM programs.

Supply support for LT6005IDHC#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 LT6003/LT6004/LT6005 family was designed specifically for ultra-low-power precision signal conditioning in energy-harvesting and battery-critical applications - emphasizing rail-to-rail operation, sub-2µA quiescent current, and guaranteed performance across extended temperature ranges.

FAQ

What is the maximum capacitive load the LT6005IDHC#PBF can drive without instability?

The LT6005IDHC#PBF is specified to remain stable with ≥500pF capacitive loads at unity gain, as confirmed in the manufacturer's Typical Performance Characteristics (Figure G22). This eliminates the need for series isolation resistors when driving ADC input filters, long PCB traces, or piezoelectric sensor cables - a key advantage over standard micropower op amps that require external compensation for loads >100pF.

Does the LT6005IDHC#PBF support true rail-to-rail input common-mode voltage range?

Yes, the LT6005IDHC#PBF supports a true rail-to-rail input common-mode range from V– to V+. Its dual-input-stage architecture - combining PNP and NPN differential pairs - ensures continuous operation across the full supply range, with input offset voltage trimmed on both stages to limit total shift to ≤1.3mV. This is verified in the Electrical Characteristics table (Input Voltage Range: 0V to V+).

What is the guaranteed input offset voltage specification for LT6005IDHC#PBF over its operating temperature range?

The LT6005IDHC#PBF guarantees a maximum input offset voltage of 500µV over the industrial temperature range of –40°C to +85°C, as specified in the Electrical Characteristics table for LT6005DHC packages. This value applies under 1.8V/5V/±8V supply conditions and is tested across the full temperature range, not just at 25°C.

How does the LT6005IDHC#PBF handle input overvoltage conditions, such as when sensor leads are shorted to supply rails?

The LT6005IDHC#PBF incorporates 600kΩ series input resistors and phase reversal protection to withstand inputs up to 9V below V– without polarity inversion. Input current is limited to ≤10mA when driven above V+, preventing latch-up or damage. These features are explicitly documented in the Applications Information section and Absolute Maximum Ratings table.

Is the exposed thermal pad on the LT6005IDHC#PBF package electrically connected, and how should it be handled on the PCB?

Yes, the exposed pad (Pin 17) on the LT6005IDHC#PBF's 16-lead DFN package is internally connected to V–. The datasheet mandates soldering this pad to the PCB's V–/ground plane for both thermal dissipation (θ_JA = 160°C/W) and electrical integrity. Leaving it unconnected degrades thermal performance and may compromise rail-to-rail output behavior under load.