Analog Devices Inc. LTC6242IDHC#PBF

Overview

LTC6242IDHC#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 space-constrained industrial and medical systems. It delivers 18MHz gain bandwidth, 10V/μs slew rate, 550nV_P-P 0.1Hz–10Hz noise, 125μV max input offset voltage, and operates from 2.8V to 6V single supply - enabling high-fidelity amplification of weak sensor signals in portable instrumentation.

For engineers reviewing the LTC6242IDHC#PBF datasheet, LTC6242IDHC#PBF pinout, LTC6242IDHC#PBF application, or LTC6242IDHC#PBF equivalent, key selection criteria include guaranteed 1pA max input bias current over temperature, 30mV rail-to-rail output swing at 1mA load, channel-to-channel matching specs, and DFN-16 package thermal performance (θ_JA = 43°C/W).

Technical Context

The LTC6242IDHC#PBF implements a unity-gain-stable CMOS input stage with ultra-low input bias current (≤1pA max) and differential input capacitance of 3.5pF, supporting high-impedance source interfacing without stability degradation. Its output stage uses complementary common-drain architecture to achieve 30mV from rails under 1mA sink/source load.

It features fully specified operation across –40°C to +85°C, with guaranteed 18MHz GBW and 10V/μs slew rate at V_S = 5V, and maintains ≥13MHz GBW even at minimum 2.8V supply - critical for battery-powered precision front-ends where supply headroom is limited.

Key Specifications

Pinout & Package

LTC6242IDHC#PBF is housed in a 16-lead (5mm × 3mm) plastic DFN package with underside thermal pad connected to V–; PCB connection to the pad is optional but recommended for thermal management (θ_JA = 43°C/W).

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 TLV9064IPWR, LTC6242IDHC#PBF uniquely balances 18MHz bandwidth, 1pA input bias, and 550nV_P-P 0.1–10Hz noise in a thermally efficient 5×3mm DFN - making it optimal for compact, battery-powered precision analog front-ends where speed, noise, and leakage sensitivity are co-constrained.

Availability

LTC6242IDHC#PBF is available at Aetrix Electronics and suitable for photodiode amplification, portable medical instrumentation, and high-impedance transducer interfacing requiring stable component supply across extended temperature ranges.

Supply support for LTC6242IDHC#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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC6242IDHC#PBF belongs to ADI's Linear Technology precision op amp product line, engineered for applications demanding ultra-low input bias current, low 1/f noise, and rail-to-rail output swing in space-constrained, low-power systems.

FAQ

What is the maximum input bias current specification for LTC6242IDHC#PBF over its full operating temperature range?

The LTC6242IDHC#PBF guarantees a maximum input bias current of 1pA over the full –40°C to +85°C operating temperature range, as confirmed in the Electrical Characteristics table for the LTC6242 DHC package variant. This value applies to all four amplifiers and is critical for preserving accuracy in high-impedance sensor interfaces where leakage current directly impacts offset.

Does LTC6242IDHC#PBF support true rail-to-rail output swing, and what is the worst-case voltage drop at rated load?

Yes, LTC6242IDHC#PBF provides rail-to-rail output swing with a worst-case saturation voltage of 30mV from either rail at 1mA load (sinking or sourcing), per the "Output Voltage Swing Low/High" specifications. This performance holds across –40°C to +85°C and 2.8V–6V supply, enabling >98% dynamic range utilization in 3.3V systems without external level-shifting circuitry.

What is the guaranteed gain bandwidth product for LTC6242IDHC#PBF, and under what test conditions is it specified?

The LTC6242IDHC#PBF guarantees a minimum gain bandwidth product of 13MHz over –40°C to +85°C, measured at 20kHz with 1kΩ load (RL = 1kΩ). The typical value is 18MHz under the same conditions. This specification ensures stable unity-gain operation and supports closed-loop bandwidths up to ~1.8MHz for gain-of-10 configurations in precision signal chains.

How does the input offset voltage matching between channels compare in LTC6242IDHC#PBF, and why does it matter in multi-channel designs?

LTC6242IDHC#PBF specifies a maximum channel-to-channel input offset voltage mismatch of 750μV over –40°C to +85°C for the DHC package. This matching ensures consistent DC gain and offset behavior across all four amplifiers - essential for differential signal processing, multi-channel data acquisition, and chopper-stabilized architectures where inter-channel drift would degrade common-mode rejection or calibration accuracy.

Is LTC6242IDHC#PBF pin-compatible with other packages in the LTC6240/LTC6241/LTC6242 family, such as the SSOP variant?

No, LTC6242IDHC#PBF is not pin-compatible with the LTC6242IGN (SSOP-16) variant. While both are quad op-amps with identical electrical specifications, the DFN-16 (DHC) and SSOP-16 (GN) packages feature different pinouts - notably, V+ and V– are assigned to pins 16 and 12 in DHC, but to pins 8 and 16 in GN. Board redesign is required when substituting between these packages.