Analog Devices Inc. LTC6258HDC#TRMPBF

Overview

LTC6258HDC#TRMPBF from Analog Devices is a single-channel, rail-to-rail input/output operational amplifier optimized for micropower, low-voltage operation in precision analog signal conditioning. It delivers 1.3MHz gain-bandwidth product, 20µA supply current, 400µV max input offset voltage, rail-to-rail swing (within 30mV of rails at 100µA load), and stable drive of up to 100nF capacitive loads - enabling high-accuracy sensor buffering in battery-powered instrumentation.

For engineers reviewing the LTC6258HDC#TRMPBF datasheet, LTC6258HDC#TRMPBF pinout, LTC6258HDC#TRMPBF application, or LTC6258HDC#TRMPBF equivalent, key selection criteria include its guaranteed –40°C to 125°C operating range, 1.8V–5.25V supply flexibility, EMI rejection ratio of 45dB at 1GHz, shutdown current ≤7µA, and C-Load™ architecture eliminating external compensation for capacitive loads.

Technical Context

The LTC6258HDC#TRMPBF employs a dual-input-stage architecture: a PNP pair active from V– to ~1V below V+, and an NPN pair taking over near V+, enabling true rail-to-rail common-mode input range (–0.1V to V+ + 0.1V). Its output stage uses a common-emitter buffer with proprietary compensation to maintain unity-gain stability into 100nF loads without external components.

Internal bias current cancellation reduces input bias current to ≤75nA across 0.2V above V– to 0.2V below V+, while EMI rejection circuitry suppresses RF-induced offset shifts by attenuating –10dBm signals at 1GHz by 45dB - critical for automotive and portable medical environments where RF immunity is non-negotiable.

Key Specifications

Pinout & Package

6-Lead Plastic DFN (2mm × 2mm × 0.8mm) with exposed pad soldered to V– for thermal and electrical performance. Pin 7 (exposed pad) is electrically connected to V– and must be soldered to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX44260ASA+T and OPA316IDBVR, the LTC6258HDC#TRMPBF uniquely combines 1.3MHz bandwidth, 20µA supply current, 45dB EMI rejection, and C-Load™ stability - making it the only option meeting all four requirements for long-life, noise-immune, capacitor-loaded precision sensing.

Availability

LTC6258HDC#TRMPBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor nodes, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6258HDC#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 LTC6258 family belongs to Analog Devices' precision micropower op amp product line, engineered specifically for ultra-low-power, high-accuracy signal conditioning in space- and energy-constrained applications such as wearable health monitors and remote environmental sensors.

FAQ

What is the maximum capacitive load the LTC6258HDC#TRMPBF can drive stably in unity-gain configuration?

The LTC6258HDC#TRMPBF is specified to drive up to 100nF capacitive loads stably in unity-gain configuration without external compensation, thanks to its C-Load™ architecture. This capability eliminates the need for isolation resistors in reference buffers or anti-aliasing filters, reducing component count and preserving signal integrity. Stability is verified across the full –40°C to 125°C temperature range and 1.8V–5.25V supply range.

Does the LTC6258HDC#TRMPBF support true ground-sensing inputs?

Yes, the LTC6258HDC#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 swing within 30mV of V–, it enables accurate amplification of ground-referenced sensor signals (e.g., thermocouples, bridge sensors) without level-shifting circuitry - a key advantage in low-voltage, single-supply systems.

What is the shutdown behavior of the LTC6258HDC#TRMPBF output stage?

When the SHDN pin is pulled ≤0.6V above V–, the LTC6258HDC#TRMPBF enters shutdown mode, reducing supply current to ≤7µA. During shutdown, the output transitions to a high-impedance state - it is neither driven high nor low, and does not source or sink current. This prevents loading of downstream circuits and avoids unintended signal injection in multiplexed or shared-bus configurations.

How does the EMI rejection ratio of 45dB at 1GHz benefit real-world designs using the LTC6258HDC#TRMPBF?

The 45dB EMI rejection ratio at 1GHz means the LTC6258HDC#TRMPBF attenuates –10dBm RF interference (e.g., from Bluetooth/WiFi transceivers) by a factor of ~178, limiting induced input offset shifts to <0.56mV. This prevents measurement corruption in portable medical devices, automotive cabin sensors, and industrial IoT nodes operating in spectrally dense RF environments - eliminating the need for costly shielding or ferrite beads in many layouts.

Is the LTC6258HDC#TRMPBF pin-compatible with other members of the LTC6258/LTC6259/LTC6260 family?

No - the LTC6258HDC#TRMPBF uses a 6-lead 2mm × 2mm DFN package with specific pinout (OUT, –IN, SHDN, V+, +IN, V–, EP), while LTC6259 variants use 8-lead packages (TSOT-23 or DFN) and LTC6260 uses 16-lead MSOP. Although functionally similar, mechanical and pinout differences require separate PCB footprints; the LTC6258HDC#TRMPBF is not a drop-in replacement for dual or quad versions.