Analog Devices Inc. LTC6242HVCDHC#PBF

Overview

LTC6242HVCDHC#PBF from Analog Devices (formerly Linear Technology) is a quad, rail-to-rail output, low-noise CMOS operational amplifier optimized for precision signal conditioning in high-impedance sensor interfaces. It delivers 18MHz gain bandwidth, 10V/μs slew rate, 550nV_P-P 0.1Hz–10Hz noise, 125μV max input offset voltage, and operates on supplies up to ±5V - enabling high-fidelity amplification in medical instrumentation and photodiode front-ends.

For engineers reviewing the LTC6242HVCDHC#PBF datasheet, LTC6242HVCDHC#PBF pinout, LTC6242HVCDHC#PBF application, or LTC6242HVCDHC#PBF equivalent, key selection criteria include guaranteed ±5V operation, 1pA max input bias current at 25°C, 16-pin DFN package with exposed V– pad, H-grade temperature range (–40°C to 125°C), and quad-channel matching performance for differential signal paths.

Technical Context

The LTC6242HVCDHC#PBF implements a unity-gain-stable CMOS input stage with ultra-low input bias current (≤1pA max) and low input capacitance (3.5pF differential), making it suitable for charge-sensitive and high-Z transducer applications. Its rail-to-rail output swings within 30mV of either supply rail under load, preserving dynamic range in low-voltage systems.

It features matched channel specifications including ≤700μV max V_OS match and ≥76dB CMRR match across all four amplifiers, supporting precision instrumentation topologies such as dual-supply differential receivers and multi-channel sensor arrays requiring consistent DC accuracy and AC response.

Key Specifications

Pinout & Package

Package: 16-lead (5mm × 3mm) plastic DFN with underside thermal pad connected to V–. Compatible with standard reflow profiles; exposed metal pad must be soldered to PCB ground plane for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OP4177ARUZ and ADA4522-4ARUZ, the LTC6242HVCDHC#PBF uniquely balances ultra-low 0.1–10Hz noise, 18MHz bandwidth, and ±5V operation - making it optimal for high-speed, high-precision, low-frequency sensor interfaces where both noise spectral shape and bandwidth matter.

Availability

LTC6242HVCDHC#PBF is available at Aetrix Electronics and suitable for medical instrumentation, photodiode amplification, and high-impedance transducer interfacing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LTC6242HVCDHC#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio. Known for high-performance op amps, data converters, and power management ICs, ADI serves industrial, automotive, and medical markets with rigorous qualification standards.

The LTC6242HVCDHC#PBF belongs to the LTC624x family of low-noise, rail-to-rail CMOS op amps designed specifically for high-impedance, low-level signal conditioning in medical, scientific, and test equipment where DC accuracy, low 1/f noise, and supply flexibility are critical.

FAQ

What is the maximum supply voltage rating for the LTC6242HVCDHC#PBF?

The LTC6242HVCDHC#PBF is rated for total supply voltage up to 12V, supporting dual supplies of ±5V (10V total) or single supplies up to 12V. This HV variant exceeds the standard LTC6242's 7V limit, enabling direct use in ±5V systems without level-shifting circuitry. Absolute maximum ratings specify V+ to V– ≤12V; operation beyond this risks permanent damage.

Does the LTC6242HVCDHC#PBF support rail-to-rail input common-mode range?

No - the LTC6242HVCDHC#PBF features rail-to-rail *output* swing but only extends its input common-mode range to the negative rail (V–). For ±5V supplies, V_CM ranges from –5V to +3.5V. This asymmetry allows robust operation with grounded sensors while maintaining low input bias current; full rail-to-rail input would compromise CMOS input stage performance.

What is the guaranteed input offset voltage specification for LTC6242HVCDHC#PBF over temperature?

The LTC6242HVCDHC#PBF is specified with 150μV max input offset voltage over the 0°C to 70°C range and 300μV max over –40°C to 85°C. At the extended H-grade (–40°C to 125°C), the datasheet guarantees ≤400μV max. These values apply to the DFN (DHC) package variant and are measured per channel under standard test conditions (V_S = ±5V, V_CM = 0V).

How does the LTC6242HVCDHC#PBF achieve low 1/f noise while maintaining high speed?

The LTC6242HVCDHC#PBF uses a proprietary CMOS input stage with optimized geometry and biasing to minimize flicker noise contributors, achieving 550nV_P-P 0.1–10Hz noise alongside 18MHz GBW and 10V/μs slew rate. Unlike chopper-stabilized amplifiers, it avoids switching artifacts - making it suitable for sensitive analog front-ends where spectral purity matters more than zero-drift.

Is the underside thermal pad of the LTC6242HVCDHC#PBF internally connected, and how should it be handled on the PCB?

Yes - the underside metal pad of the LTC6242HVCDHC#PBF is internally connected to the V– pin (Pin 4). It must be soldered to a PCB copper pour tied to the system V– net, not left floating. Proper thermal pad connection reduces θ_JA from 125°C/W (no pad) to 43°C/W, enabling full 4-channel operation at 125°C ambient without thermal shutdown or parameter drift.