Analog Devices Inc. LTC2055HVHDD#PBF

Overview

LTC2055HVHDD#PBF from Analog Devices (formerly Linear Technology) is a dual, micropower, zero-drift operational amplifier in an 8-lead 3mm × 3mm DFN package, rated for –40°C to 125°C operation. It delivers 3μV max input offset voltage, 30nV/°C max drift, 130dB PSRR/CMRR, rail-to-rail output swing, and 500kHz gain-bandwidth - enabling precision DC-coupled sensing in high-reliability industrial and automotive systems.

For engineers reviewing the LTC2055HVHDD#PBF datasheet, LTC2055HVHDD#PBF pinout, LTC2055HVHDD#PBF application, or LTC2055HVHDD#PBF equivalent, key selection criteria include guaranteed high-voltage supply support (±5.5V), ultra-low drift over extended temperature, DFN thermal performance (θJA = 160°C/W), and dual-channel layout efficiency in space-constrained PCBs.

Technical Context

The LTC2055HVHDD#PBF employs auto-zeroing architecture with a 1kHz internal clock to continuously correct input offset and drift, achieving near-zero DC error across temperature and common-mode voltage. Its input stage supports rail-to-rail common-mode range (V– to V+ – 0.5V) and features picoampere-level input bias current (1pA typ at 25°C).

It operates from ±2.5V to ±5.5V supplies (11V total), delivering rail-to-rail output swing into 5kΩ loads and maintaining 140dB open-loop gain (typ) and 1.6μV_P-P (0.01Hz–10Hz) noise - critical for low-frequency, high-resolution signal conditioning where DC accuracy dominates system error budget.

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 precision operational amplifier applications.

Compared with AD8629ARZ and LTC2055HVIDD#PBF, the LTC2055HVHDD#PBF uniquely combines dual-channel operation, ±5.5V supply tolerance, and guaranteed 125°C performance - making it the only option for high-voltage, high-temperature, space-constrained dual-amplifier applications.

Availability

LTC2055HVHDD#PBF is available at Aetrix Electronics and suitable for high-reliability industrial automation, automotive powertrain monitoring, and precision test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2055HVHDD#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 LTC2055HVHDD#PBF belongs to Linear's zero-drift op amp product line, engineered specifically for applications demanding uncompromised DC precision - including sensor interfaces, medical instrumentation, and industrial process control where offset and drift dominate system error.

FAQ

What is the maximum supply voltage for the LTC2055HVHDD#PBF?

The LTC2055HVHDD#PBF supports a total supply voltage of up to 12V, meaning it can operate with ±5.5V supplies (V+ = +5.5V, V– = –5.5V). This high-voltage capability distinguishes it from standard-grade versions like LTC2055IDD#PBF and enables direct interfacing with ±5V analog subsystems without external level-shifting circuitry. Absolute maximum rating is 12V between V+ and V– pins.

Does the LTC2055HVHDD#PBF require external capacitors for stability?

No, the LTC2055HVHDD#PBF is unity-gain stable and does not require external compensation capacitors. Its internal compensation ensures stable operation with capacitive loads up to 100pF and resistive feedback networks. However, a 0.1μF bypass capacitor between V+ and V– near the DFN package is strongly recommended to suppress high-frequency supply noise that could modulate the auto-zero clock feedthrough.

How does the auto-zeroing architecture affect noise performance in the LTC2055HVHDD#PBF?

The LTC2055HVHDD#PBF's auto-zeroing architecture achieves ultra-low 1.6μV_P-P noise from 0.01Hz to 10Hz but introduces a 1kHz clock feedthrough component (<0.2μV_RMS). This residue appears as a narrowband spike in the output spectrum and is input-referred - meaning it scales with closed-loop gain. For DC-critical applications, proper PCB layout (short traces, ground plane) and optional RC filtering at the output suppress its impact without degrading DC accuracy.

Can the LTC2055HVHDD#PBF drive ADC inputs directly?

Yes, the LTC2055HVHDD#PBF can directly drive SAR and sigma-delta ADC inputs due to its rail-to-rail output swing (±4.78V min on ±5V supplies), low output impedance (<1Ω), and 1.6μV_P-P low-frequency noise. When paired with a 24-bit ADC, it preserves >110dB SNR in DC-coupled configurations. Ensure the ADC input capacitance is ≤100pF or add a small series resistor (10–50Ω) to isolate capacitive loading if needed.

What is the thermal resistance (θJA) of the LTC2055HVHDD#PBF in its DFN package?

The LTC2055HVHDD#PBF has a junction-to-ambient thermal resistance (θJA) of 160°C/W when mounted on a standard PCB with minimal copper area. This value assumes the exposed V– pad is soldered to an internal ground plane. Expanding the copper area beneath and around the DFN reduces θJA significantly - e.g., 25mm² of 2oz copper per layer lowers it to ~65°C/W - enabling higher continuous output current or operation in hotter ambient environments without derating.