Analog Devices Inc. LTC2055HVIDD#PBF

Overview

LTC2055HVIDD#PBF from Analog Devices (formerly Linear Technology) is a dual zero-drift operational amplifier in an 8-lead 3mm × 3mm DFN package, rated for –40°C to 85°C operation. It delivers 3μV max input offset voltage, 30nV/°C max offset drift, 130dB PSRR/CMRR, rail-to-rail output swing, and 500kHz gain-bandwidth - enabling precision DC-coupled signal conditioning in battery-powered instrumentation and industrial sensor interfaces.

For engineers reviewing the LTC2055HVIDD#PBF datasheet, LTC2055HVIDD#PBF pinout, LTC2055HVIDD#PBF application, or LTC2055HVIDD#PBF equivalent, key selection criteria include guaranteed offset performance over temperature, ultra-low 130μA/amp supply current, DFN thermal characteristics (θJA = 160°C/W), and compatibility with single-supply (2.7V–6V) or split-supply (±2.5V) configurations.

Technical Context

The LTC2055HVIDD#PBF employs auto-zeroing architecture with a 1kHz internal clock to continuously correct input offset and drift, achieving near-zero DC errors across temperature and common-mode voltage. Its input stage supports rail-to-rail common-mode range (V– to V+ – 0.5V) and features 1pA typical input bias current at 25°C.

It integrates dual independent amplifiers sharing a common V+ and V– supply, each with 140dB open-loop gain, 0.5V/μs slew rate, and 1.6μV_P-P (0.01Hz–10Hz) input-referred noise - optimized for high-resolution, low-power, DC-accurate applications where long-term stability and minimal drift dominate design requirements.

Key Specifications

Pinout & Package

Package: 8-lead plastic DFN (3mm × 3mm × 0.8mm), exposed pad internally connected to V–; θJA = 160°C/W with minimal PCB copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual zero-drift operational amplifier applications.

Compared with LTC2055IDD#PBF and AD8629ARZ, the LTC2055HVIDD#PBF uniquely combines HV supply capability (±5.5V), ultra-low 130μA/amp current, and compact DFN packaging - making it optimal for space- and power-constrained dual-channel precision systems requiring split-rail flexibility.

Availability

LTC2055HVIDD#PBF is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor interfaces, and portable test equipment requiring stable component supply with guaranteed –40°C to 85°C performance and long-term DC accuracy.

Supply support for LTC2055HVIDD#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 LTC2055HVIDD#PBF belongs to Linear's zero-drift op amp family, engineered specifically for applications demanding nanovolt-level DC precision, ultra-low drift, and micropower operation in harsh thermal environments.

FAQ

What is the maximum supply voltage for the LTC2055HVIDD#PBF?

The LTC2055HVIDD#PBF supports a total supply voltage of up to 12V, enabling operation from ±5.5V split supplies or 2.7V to 11V single supplies. This HV rating distinguishes it from standard-grade variants like LTC2055IDD#PBF (max 7V), allowing direct use in legacy ±5V systems without level-shifting circuitry.

Does the LTC2055HVIDD#PBF require external capacitors for stability?

No, the LTC2055HVIDD#PBF is unity-gain stable and does not require external compensation capacitors. However, a 0.1μF ceramic capacitor placed close to the V+ and V– pins is mandatory for supply decoupling to suppress high-frequency noise and prevent oscillation due to its auto-zeroing clock feedthrough.

How does the auto-zeroing clock affect signal integrity in the LTC2055HVIDD#PBF?

The LTC2055HVIDD#PBF uses a 1kHz internal auto-zeroing clock, producing two forms of clock feedthrough: input-referred residue (<0.2μV_RMS) and charge-injection–induced spikes. The latter is minimized by keeping input source resistance <10kΩ and using smaller feedback resistors - critical for preserving SNR in precision DC measurements.

Can the LTC2055HVIDD#PBF drive capacitive loads directly?

The LTC2055HVIDD#PBF is not optimized for heavy capacitive loads. Driving >100pF directly may cause peaking or instability. For ADC driving or cable termination, use a series resistor (20–100Ω) between the output and capacitance, or add a small isolation capacitor (e.g., 100pF) in the feedback path to maintain phase margin without degrading DC accuracy.

Is the exposed thermal pad on the LTC2055HVIDD#PBF package required to connect to V–?

Yes - the underside metal pad of the LTC2055HVIDD#PBF's DFN package is internally connected to V– and must be soldered to a PCB copper pour tied to the V– net. This connection is essential for thermal dissipation (reducing θJA from 160°C/W to ~45°C/W with adequate copper) and electrical noise suppression; floating the pad risks overheating and increased output noise.