Analog Devices Inc. LTC6261HDC#TRMPBF

Overview

LTC6261HDC#TRMPBF from Analog Devices is a single-channel, rail-to-rail input/output operational amplifier optimized for micropower, low-noise, and high-precision signal conditioning in battery-powered systems. It delivers 30MHz gain-bandwidth product, 240µA quiescent current, 400µV max input offset voltage, rail-to-rail operation from 1.8V to 5.25V supply, and stable drive of up to 1nF capacitive loads - enabling high-fidelity ADC driving in portable instrumentation and automotive sensor front-ends.

For engineers reviewing the LTC6261HDC#TRMPBF datasheet, LTC6261HDC#TRMPBF pinout, LTC6261HDC#TRMPBF application, or LTC6261HDC#TRMPBF equivalent, key selection criteria include its –40°C to 125°C H-grade temperature rating, 6-lead 2mm × 2mm DFN package with exposed V– pad, shutdown capability (10µA max), and verified performance as an LTC2362 ADC driver with 72dB SNR and –83.6dB THD at 5kHz.

Technical Context

The LTC6261HDC#TRMPBF employs a dual-input-stage architecture (PNP + NPN) enabling rail-to-rail input common-mode range (–0.1V to V+ + 0.1V) and seamless transition across the full supply range. Its patented bias-current cancellation circuit maintains ≤100nA max input bias current over 0.2V–0.2V from rails, critical for high-impedance sensor interfaces.

Internal compensation ensures unity-gain stability with ≥1nF capacitive loads while sustaining 7V/µs slew rate and 13nV/√Hz input voltage noise density at 1kHz. The SHDN pin provides active-low control with 0.6V logic threshold referenced to V–, placing output in high-impedance state during shutdown.

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 2mm × 0.8mm) plastic DFN with exposed V– pad (Pin 7), requiring solder connection to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADA4500-2ARZ-R7 and OPA333AIDBVR, the LTC6261HDC#TRMPBF uniquely balances 30MHz bandwidth, 240µA quiescent current, –40°C to 125°C operation, and 6-lead DFN packaging - making it optimal for compact, high-speed, wide-temperature industrial and automotive signal chains where both AC fidelity and DC accuracy matter.

Availability

LTC6261HDC#TRMPBF is available at Aetrix Electronics and suitable for micropower active filters, portable instrumentation, and battery- or solar-powered systems requiring stable component supply across extended temperature ranges.

Supply support for LTC6261HDC#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC6261 family was designed specifically for ultra-low-power, high-precision signal conditioning in space- and energy-constrained applications - combining rail-to-rail I/O, high GBW/power ratio, and robust capacitive load drive in miniature packages.

FAQ

What is the maximum capacitive load the LTC6261HDC#TRMPBF can drive stably?

The LTC6261HDC#TRMPBF is unity-gain stable with capacitive loads up to 1nF, as confirmed in the datasheet's Typical Performance Characteristics (Figure 28). This eliminates the need for isolation resistors when interfacing directly with SAR ADC input capacitance (e.g., LTC2362) or long PCB traces with parasitic capacitance. Stability is maintained across the full –40°C to 125°C temperature range and 1.8V–5.25V supply range.

Does the LTC6261HDC#TRMPBF support true ground-sensing input?

Yes, the LTC6261HDC#TRMPBF supports true ground-sensing: its input common-mode range extends to V– – 0.1V, allowing operation with inputs at 0V when V– is grounded. Combined with rail-to-rail output, this enables full 0–V_REF signal handling in single-supply systems - critical for precision sensor interfaces like bridge-based pressure transducers.

What is the shutdown behavior of the LTC6261HDC#TRMPBF?

When the SHDN pin is pulled ≤0.6V above V–, the LTC6261HDC#TRMPBF enters shutdown mode, reducing supply current to ≤10µA. During shutdown, the output transitions to a high-impedance state - preventing loading of downstream circuitry. Turn-on time is 15µs (0V→5V SHDN edge), and the pin is internally pulled up to V+ when left floating, keeping the device enabled by default.

How does the LTC6261HDC#TRMPBF achieve low input bias current?

The LTC6261HDC#TRMPBF uses an active bias-current cancellation circuit that mirrors and subtracts base currents of its PNP/NPN input stages. This achieves ≤100nA max input bias current over the central 0.2V–0.2V region from each rail - essential for accurate amplification of signals from high-impedance sources such as pH electrodes or photodiode transimpedance configurations.

Is the LTC6261HDC#TRMPBF pin-compatible with other members of the LTC6261 family?

Yes - the LTC6261HDC#TRMPBF shares identical pinout and footprint with all 6-lead variants in the LTC6261 family, including LTC6261IDC#TRMPBF (I-grade) and LTC6261HS6#TRMPBF (TSOT-23). This allows drop-in replacement across temperature grades and packages without PCB redesign, provided mechanical constraints (DFN vs TSOT-23) are verified.