Analog Devices Inc. LT6014IDD#PBF

Overview

LT6014IDD#PBF from Analog Devices (formerly Linear Technology) is a dual rail-to-rail output precision operational amplifier optimized for low-noise, micro-power sensor interface applications. It delivers 9.5nV/√Hz input voltage noise at 1kHz, 145µA supply current per amplifier, and guaranteed stability at gain ≥5 across –40°C to 85°C. It is used in thermocouple amplifiers and battery-powered precision instrumentation where offset drift ≤1.2µV/°C and rail-to-rail swing within 40mV of supplies are critical.

For engineers reviewing the LT6014IDD#PBF datasheet, LT6014IDD#PBF pinout, LT6014IDD#PBF application, or LT6014IDD#PBF equivalent, this page provides verified package mapping (8-lead 3mm × 3mm DFN), confirmed dual-amplifier topology, exact input bias current (±800pA max at –40°C to 85°C), channel matching specs (250µV max offset match), and real-world design constraints including mandatory AV ≥5 stability requirement and 500pF capacitive load capability.

Technical Context

The LT6014IDD#PBF implements a decompensated two-stage CMOS input stage with on-chip input protection diodes and 500Ω series resistors, enabling stable operation only at closed-loop gains ≥5. Its architecture prioritizes low 1/f noise (200nV_P-P, 0.1Hz–10Hz) and high PSRR (112dB min) over unity-gain stability - a deliberate trade-off for precision DC performance in low-power systems.

It features matched dual amplifiers sharing a common substrate, delivering 110dB minimum channel separation and specified matching parameters (∆V_OS, ∆I_B) over temperature. Input common-mode range is limited to V^– + 1V to V⁺ – 1.2V, while output swings to within 40mV of either rail under no-load conditions.

Key Specifications

Pinout & Package

LT6014IDD#PBF is housed in an 8-lead 3mm × 3mm plastic DFN package (DD) with exposed pad connected to V–. The underside metal pad is optional for PCB connection and improves thermal performance (θ_JA = 160°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT6014IDD#PBF, LT6014CS8#PBF trades thermal performance and temperature range for SO-8 compatibility, while LT6012IDC#PBF sacrifices low-noise and micro-power advantages to achieve unity-gain stability - making each alternative suitable only for specific architectural constraints, not drop-in replacement.

Availability

LT6014IDD#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, precision photodiode interfaces, and micro-power sensor nodes requiring stable component supply with guaranteed –40°C to 85°C operation and long-term parametric consistency.

Supply support for LT6014IDD#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 process control and application-focused validation.

The LT6013/LT6014 family was designed specifically for ultra-low-noise, micro-power precision signal conditioning in battery-operated and space-constrained instrumentation - emphasizing offset stability, rail-to-rail output, and robustness against PCB leakage and thermal gradients.

FAQ

What is the minimum stable gain for LT6014IDD#PBF?

The LT6014IDD#PBF is decompensated and guaranteed stable only at closed-loop gains of 5 or greater. Using it at unity gain or gain-of-2 will cause oscillation or excessive ringing. For unity-gain applications, consider the LT6012IDC#PBF - a unity-gain stable variant in the same family. Always verify phase margin with actual PCB parasitics when designing near the stability boundary.

Does LT6014IDD#PBF support single-supply operation?

Yes, LT6014IDD#PBF operates from 2.7V single supply up to ±18V split supply. Its rail-to-rail output swings within 40mV of both rails under no load, and input common-mode range extends from V– + 1V to V+ – 1.2V - enabling true single-supply designs like 3.3V sensor interfaces. However, input signals must stay within that valid common-mode window to avoid gain collapse.

What is the maximum capacitive load LT6014IDD#PBF can drive?

LT6014IDD#PBF can directly drive up to 500pF capacitive load when configured at gain ≥5. At higher gains (e.g., AV = 10), it supports larger loads. For loads exceeding 500pF or for lower-gain configurations, add a small series resistor (e.g., 10–50Ω) between the output and capacitor to isolate the reactive load and preserve stability - as confirmed in the official LT6014 datasheet Figure 23.

How does LT6014IDD#PBF handle input overvoltage conditions?

LT6014IDD#PBF includes internal 500Ω series resistors and back-to-back diodes on both inputs, limiting differential input current to ≤10mA for ≤10V differential voltage. For sustained >10V differential inputs (e.g., ESD events), external series resistors are required - such as 1kΩ per input to safely withstand 30V differential. Absolute maximum differential input voltage remains 10V per datasheet Absolute Maximum Ratings table.

Is LT6014IDD#PBF pin-compatible with other LT6014 variants?

Yes, all LT6014 variants - including LT6014IDD#PBF (DFN), LT6014IS8#PBF (SO-8), and LT6014ACDD#PBF (DFN, A-grade) - share identical 8-pin pinouts and electrical functionality. The DFN and SO-8 packages are mechanically incompatible, but PCB layouts can be adapted using compatible land patterns. Electrical differences (e.g., offset voltage, drift) depend on grade (I vs C vs A) and package thermal characteristics, not pin assignment.