Analog Devices Inc. LTC6240HVHS8#PBF

Overview

LTC6240HVHS8#PBF from Analog Devices (formerly Linear Technology) is a single-channel, rail-to-rail output, low-noise CMOS operational amplifier optimized for high-precision, high-impedance signal conditioning. It delivers 18MHz gain bandwidth, 10V/μs slew rate, 550nV_P-P 0.1Hz–10Hz noise, ≤1pA max input bias current, and operates on supplies up to ±5.5V - enabling use in photodiode amplifiers, medical front-ends, and sensor interfaces where DC accuracy and low current leakage are critical.

For engineers reviewing the LTC6240HVHS8#PBF datasheet, LTC6240HVHS8#PBF pinout, LTC6240HVHS8#PBF application, or LTC6240HVHS8#PBF equivalent, key selection criteria include guaranteed 1pA max input bias current at H-grade temperature range (–40°C to 125°C), HV-series supply tolerance (±5.5V), SO-8 package compatibility with PCB guard rings, and rail-to-rail output swing within 30mV of rails under load.

Technical Context

The LTC6240HVHS8#PBF employs a proprietary CMOS input stage with ultra-low gate leakage, enabling sub-picoampere bias current performance across its full –40°C to 125°C operating range. Its unity-gain-stable architecture supports wideband closed-loop configurations without external compensation.

It features a fully differential input common-mode range extending to the negative rail and rail-to-rail output stage capable of sourcing/sinking ≥5mA while maintaining <325mV saturation voltage - critical for driving ADC reference buffers and active filters in ±5V industrial systems.

Key Specifications

Pinout & Package

Package: 8-lead plastic SO (SO-8), RoHS-compliant, lead-free finish, thermal resistance θ_JA = 190°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, rail-to-rail output op amp applications.

Compared with ADA4522-1ARZ and OPA2189IDR, the LTC6240HVHS8#PBF provides superior 0.1Hz–10Hz noise (550nV_P-P) and higher slew rate (10V/μs) at lower cost, making it optimal for high-fidelity analog front-ends where wideband fidelity outweighs ultra-low drift requirements.

Availability

LTC6240HVHS8#PBF is available at Aetrix Electronics and suitable for photodiode amplifiers, medical instrumentation, and industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6240HVHS8#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, serving industrial, automotive, communications, and healthcare markets.

The LTC6240HVHS8#PBF belongs to ADI's legacy Linear Technology precision op amp portfolio, engineered specifically for low-noise, low-input-bias applications demanding rail-to-rail output swing and extended temperature operation in harsh environments.

FAQ

What is the maximum guaranteed input bias current for LTC6240HVHS8#PBF over temperature?

The LTC6240HVHS8#PBF guarantees ≤1pA maximum input bias current across its full operating temperature range of –40°C to 125°C, as specified in the H-grade electrical characteristics table. This value is validated for the SO-8 package variant and is critical for maintaining accuracy in high-impedance sensor interfaces where leakage currents dominate error budgets. The LTC6240HVHS8#PBF achieves this via optimized CMOS input transistor geometry and process-controlled gate oxide integrity.

Does LTC6240HVHS8#PBF support true dual-supply operation up to ±5.5V?

Yes, the LTC6240HVHS8#PBF supports total supply voltages up to 12V, enabling operation from ±5.5V rails. Its absolute maximum ratings specify V+ to V– ≤12V, and electrical characteristics are guaranteed for ±5V operation (VS = ±5V, VCM = 0V). This HV-series rating allows direct drop-in replacement in legacy ±5V industrial systems without redesigning power rails. The LTC6240HVHS8#PBF maintains all key specs - including 18MHz GBW and ≤1pA bias current - under these conditions.

What is the minimum supply voltage required for functional operation of LTC6240HVHS8#PBF?

The LTC6240HVHS8#PBF requires a minimum total supply voltage of 2.8V, as guaranteed by its power supply rejection ratio test. This allows operation from single 3V or 3.3V rails, or split ±1.5V supplies, while maintaining rail-to-rail output swing and 18MHz gain bandwidth. At 2.8V, the device delivers full functionality including 550nV_P-P low-frequency noise and ≤1pA input bias current - confirmed across –40°C to 125°C. The LTC6240HVHS8#PBF remains stable and specified down to this threshold without performance degradation.

How does the LTC6240HVHS8#PBF achieve rail-to-rail output swing?

The LTC6240HVHS8#PBF uses a complementary NMOS/PMOS output stage that actively pulls the output to within 30mV of either supply rail under no-load conditions, and within 325mV at 5mA sink/source current. This architecture eliminates crossover distortion and preserves linearity across the full output range. The output stage is internally compensated for unity-gain stability and maintains phase margin >60° across temperature and load. The LTC6240HVHS8#PBF achieves this while consuming only 2.4mA per amplifier - balancing speed, precision, and efficiency.

Is LTC6240HVHS8#PBF pin-compatible with other members of the LTC624x family?

No - the LTC6240HVHS8#PBF is not pin-compatible with dual or quad variants (e.g., LTC6241HVHS8#PBF or LTC6242HVHGN#PBF), as those devices have different pinouts for channel count and internal configuration. However, it shares the same SO-8 footprint and pin assignment as the non-HV LTC6240HS8#PBF and LTC6240IS8#PBF variants. All SO-8 versions use identical pin 1 (NC), pin 2 (V–), pin 3 (+IN), pin 4 (–IN), pin 5 (OUT), pins 6–7 (NC), and pin 8 (V+), enabling direct substitution within the single-amplifier SO-8 lineage. The LTC6240HVHS8#PBF retains this mechanical and electrical pinout.