Analog Devices Inc. LT6018IDE#PBF

Overview

LT6018IDE#PBF from Analog Devices (formerly Linear Technology) is a 33V ultralow-noise precision operational amplifier in a 12-lead 4mm × 3mm DFN package with exposed pad. It delivers 30nVP-P 0.1Hz–10Hz noise, 50µV max input offset voltage, 0.5µV/°C max drift, 124dB min CMRR, and 30V/µs slew rate - enabling high-fidelity signal conditioning in precision data acquisition systems.

For engineers reviewing the LT6018IDE#PBF datasheet, LT6018IDE#PBF pinout, LT6018IDE#PBF application, or LT6018IDE#PBF equivalent, key selection criteria include its shutdown-enabled low-power operation (6.2µA), rail-to-rail output swing capability, ±15V dual-supply compatibility, and robust 4.5kV HBM ESD tolerance for industrial sensor front-ends and ADC driver stages.

Technical Context

The LT6018IDE#PBF employs a proprietary input stage with series Zener diode protection-eliminating conventional clamping diodes-to maintain ultralow input bias current under transient overvoltage conditions while preserving 1/f noise performance. Its enable pin references DGND, allowing flexible interface with single- or split-supply logic across its full –40°C to 85°C operating range.

DC precision is sustained via a high-open-loop-gain architecture (132dB min AVOL) and common-mode rejection maintained over V– + 3V to V+ – 3V input range. The device achieves 16-bit settling (0.0015%) in 1.2µs with 2kΩ load and 100pF capacitance, supporting fast multiplexed sampling without gain error degradation.

Key Specifications

Pinout & Package

LT6018IDE#PBF uses a 12-lead (4mm × 3mm) plastic DFN package with exposed pad (Pin 13), rated for –40°C to 85°C operation. The exposed pad must be connected to V– or floated to optimize thermal resistance (θJA = 43°C/W, θJC = 12°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2189IDRCT and ADA4522-2ARMZ, LT6018IDE#PBF uniquely balances ultralow 1/f noise, fast settling, and integrated shutdown-making it optimal for portable, multiplexed, or power-constrained precision measurement systems where all three attributes are simultaneously required.

Availability

LT6018IDE#PBF is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor conditioning, and professional audio signal chains requiring stable component supply, extended temperature support, and traceable sourcing.

Supply support for LT6018IDE#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LT6018IDE#PBF belongs to Linear's precision op amp product line, engineered specifically for applications demanding ultralow 1/f noise, high DC accuracy, and fast settling-such as test equipment, medical instrumentation, and high-end audio.

FAQ

What is the maximum supply voltage for LT6018IDE#PBF?

The LT6018IDE#PBF has an absolute maximum total supply voltage (V+ to V–) of 36V, with a specified operating range of 8V to 33V. Operation beyond 33V risks exceeding safe junction temperature limits and violating PSRR specifications. For reliable long-term performance, Analog Devices recommends staying within the 8V–33V range, especially when driving capacitive loads or operating at elevated ambient temperatures.

Does LT6018IDE#PBF support rail-to-rail input or output?

The LT6018IDE#PBF does not support rail-to-rail input - its common-mode input range is limited to V– + 3V to V+ – 3V - but it provides rail-to-rail output swing capability. Output voltage can swing within 700mV of V– and 425mV of V+ under no-load conditions, improving to within 1.8V and 1.6V respectively at 20mA load. This makes LT6018IDE#PBF suitable for high-voltage precision buffering where input signals stay ≥3V away from rails.

How does the EN pin function on LT6018IDE#PBF?

The EN pin on LT6018IDE#PBF is an active-high enable input referenced to the DGND pin. To activate the amplifier, EN must be driven ≥1.7V above DGND; to enter shutdown, EN must be ≤0.8V above DGND. In shutdown mode, supply current drops to 6.2µA typical, but the output remains low-impedance and may source/sink leakage current. The LT6018IDE#PBF exits shutdown in 25µs typical, enabling rapid wake-up in duty-cycled systems.

What is the thermal resistance of LT6018IDE#PBF in its DFN package?

The LT6018IDE#PBF in the 12-lead 4mm × 3mm DFN package has a junction-to-ambient thermal resistance (θJA) of 43°C/W and a junction-to-case thermal resistance (θJC) of 12°C/W. Connecting the exposed pad (Pin 13) to the V– plane reduces θJA significantly - Analog Devices specifies that proper PCB copper pour under the pad improves thermal performance and extends safe operating area, especially at high supply voltages or ambient temperatures near 85°C.

Can LT6018IDE#PBF drive capacitive loads, and what is the limit?

Yes, LT6018IDE#PBF can drive capacitive loads up to 100pF in unity-gain configuration without instability. At higher gains, its capacitive load drive capability increases - e.g., 500pF is supported at G = 10. For loads exceeding these values, a small series resistor (e.g., 10–50Ω) between OUT and the load restores phase margin. This behavior is verified in Figure 19 of the LT6018 datasheet and applies directly to the LT6018IDE#PBF variant in DFN packaging.