Analog Devices Inc. LTC6240HS5#TRMPBF

Overview

LTC6240HS5#TRMPBF from Analog Devices (formerly Linear Technology) is a single-channel, rail-to-rail output, low-noise CMOS operational amplifier optimized for high-impedance sensor interfacing and precision signal conditioning in harsh thermal environments. It delivers 18MHz gain bandwidth, 10V/μs slew rate, 550nV_P-P 0.1Hz–10Hz noise, ≤125μV max input offset voltage, and guaranteed ≤1pA input bias current at –40°C to +125°C - enabling accurate amplification of weak signals from photodiodes, piezoelectric transducers, and medical biosensors.

For engineers reviewing the LTC6240HS5#TRMPBF datasheet, LTC6240HS5#TRMPBF pinout, LTC6240HS5#TRMPBF application, or LTC6240HS5#TRMPBF equivalent, key selection criteria include its H-grade temperature rating, SOT-23-5 package footprint, ultra-low input bias current stability over temperature, rail-to-rail output swing within 30mV of rails, and compatibility with 2.8V–6V single-supply systems.

Technical Context

The LTC6240HS5#TRMPBF employs a proprietary CMOS input stage with guarded input traces and low-leakage dielectric isolation to achieve sub-picoampere input bias current across its full –40°C to +125°C operating range. Its unity-gain-stable architecture integrates internal compensation for robust phase margin (>60°) with 5pF capacitive loads.

It features a Class AB output stage delivering rail-to-rail swing (≤30mV from V+ or V–) and supports fast settling (1100ns to 0.1% for 2V step) while maintaining low distortion in low-voltage, low-power signal chains - particularly where input common-mode range extends to the negative rail and supply rejection exceeds 80dB.

Key Specifications

Pinout & Package

Package: 5-lead TSOT-23 (ThinSOT™), 1mm height, lead-free, tape-and-reel. Thermal resistance θ_JA = 250°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, low-input-bias op amp applications.

Compared with ADA4530-1ARZ and OPA377AIDBVR, the LTC6240HS5#TRMPBF uniquely balances 18MHz bandwidth, guaranteed ≤1pA bias over –40°C to +125°C, and SOT-23-5 footprint - making it the only option meeting all three requirements for high-reliability, high-speed, high-temperature sensor interfaces.

Availability

LTC6240HS5#TRMPBF is available at Aetrix Electronics and suitable for photodiode amplification, medical biosensor front-ends, and industrial process monitoring requiring stable component supply across extended temperature ranges.

Supply support for LTC6240HS5#TRMPBF 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, formed through the acquisition of Linear Technology in 2017.

The LTC6240 family belongs to ADI's precision op amp product line, engineered specifically for ultra-low-input-bias, low-noise, rail-to-rail signal conditioning in demanding industrial, medical, and test equipment applications.

FAQ

What is the maximum guaranteed input bias current for LTC6240HS5#TRMPBF over its full operating temperature range?

The LTC6240HS5#TRMPBF guarantees ≤1pA maximum input bias current across its specified operating temperature range of –40°C to +125°C, as confirmed in the Electrical Characteristics table for the H-grade variant. This specification is critical for preserving accuracy in high-impedance sensor interfaces such as photodiode and piezoelectric transducer amplifiers where leakage currents directly impact measurement fidelity.

Does LTC6240HS5#TRMPBF support true rail-to-rail input common-mode voltage range?

The LTC6240HS5#TRMPBF supports rail-to-rail *output* swing but its input common-mode range extends only to the negative rail (V–) and up to 3.5V below the positive rail (V+) on 5V supply - not full rail-to-rail input. This design enables ground-referenced signal acquisition while maintaining low input offset and bias current, as verified in the "Input Voltage Range" parameter of the datasheet.

Can LTC6240HS5#TRMPBF operate from a ±2.5V dual supply?

No - the LTC6240HS5#TRMPBF is part of the standard-voltage LTC6240 series, rated for total supply voltage of 2.8V to 6V (single supply) or 2.8V to ±3V (dual supply). For ±2.5V operation, the HV variant (e.g., LTC6240HVHS5#TRMPBF) must be used, which supports up to ±5.5V total supply. This distinction is explicitly defined in the Absolute Maximum Ratings and Available Options tables.

What is the typical 1kHz input voltage noise density of LTC6240HS5#TRMPBF?

The LTC6240HS5#TRMPBF exhibits a typical input voltage noise density of 7nV/√Hz at 1kHz, with a guaranteed maximum of 10nV/√Hz. This value is consistent across all variants including the H-grade and is measured under standard conditions (VS = 5V, VCM = 2.5V), as documented in the Electrical Characteristics section under "en - Input Noise Voltage Density".

Is LTC6240HS5#TRMPBF unity-gain stable, and does it require external compensation?

Yes - the LTC6240HS5#TRMPBF is internally compensated for unity-gain stability and requires no external compensation components. Its phase margin exceeds 60° with 5pF capacitive load, as validated in the "Gain Bandwidth and Phase Margin vs Temperature" typical performance curve. This allows direct use in buffer, follower, and low-gain configurations without risk of oscillation.