Analog Devices Inc. LTC6090HS8E-5#PBF

Overview

LTC6090HS8E-5#PBF from Analog Devices (formerly Linear Technology) is a high-voltage, precision rail-to-rail output operational amplifier optimized for noise gain ≥5 configurations. It operates from ±4.75V to ±70V supplies (140V total), delivers 50mA output current, features 12MHz gain-bandwidth product and 21V/µs slew rate, and is rated for –40°C to 125°C junction temperature - ideal for high-voltage DAC buffering, piezo drivers, and photodiode amplification.

For engineers reviewing the LTC6090HS8E-5#PBF datasheet, LTC6090HS8E-5#PBF pinout, LTC6090HS8E-5#PBF application, or LTC6090HS8E-5#PBF equivalent, key selection criteria include guaranteed thermal performance up to 125°C, picoamp input bias current (≤50pA), low 1.25mV max offset voltage, 130dB CMRR, and SOIC-8E thermally enhanced package with exposed V– pad.

Technical Context

The LTC6090HS8E-5#PBF uses a proprietary CMOS process enabling rail-to-rail output swing while maintaining precision DC performance under high supply voltages. Its internal architecture includes a differential drive generator, thermal sensor with 145°C activation threshold, open-drain TFLAG output, and active-low OD pin with 2MΩ internal pull-up.

It supports stable operation in noise gain ≥5 configurations only (not unity-gain stable), features guard pins in TSSOP variants (not present in SOIC-8E), and integrates input protection with Zener clamping and ESD structures. The COM pin establishes a logic-reference ground for interfacing OD/TFLAG to low-voltage controllers.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic SOIC with Exposed Pad (S8E). Exposed pad (Pin 9) is electrically connected to V– and must be soldered to PCB for thermal management (θ_JC = 5°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage op-amp applications.

Compared with LTC6090HS8E#PBF, the LTC6090HS8E-5#PBF trades unity-gain stability for improved phase margin at noise gain ≥5 - enhancing robustness in fixed-gain HV buffers. Versus OPA454AIDDA, it delivers superior DC precision, integrated thermal protection, and lower input current at the cost of maximum supply voltage headroom.

Availability

LTC6090HS8E-5#PBF is available at Aetrix Electronics and suitable for high-voltage DAC buffering, piezo actuator driving, and photodiode amplification requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6090HS8E-5#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 legacy of high-performance analog ICs, particularly in precision, high-voltage, and signal-chain solutions.

The LTC6090HS8E-5#PBF belongs to Linear's high-voltage precision op-amp family, designed specifically for applications demanding rail-to-rail output swing, picoamp input bias, and robust thermal management in ±70V systems.

FAQ

What is the minimum noise gain required for stable operation of the LTC6090HS8E-5#PBF?

The LTC6090HS8E-5#PBF is specified for stable operation only at noise gain ≥5. Attempting unity-gain or gain-of-2 configurations may cause oscillation or excessive ringing. This is a hard design constraint - not a recommendation - enforced by internal compensation. Always verify stability with load and parasitic capacitance in final layout.

How does the COM pin function in the LTC6090HS8E-5#PBF, and what happens if left floating?

The COM pin on the LTC6090HS8E-5#PBF serves as the reference for OD and TFLAG logic levels. If left floating, an internal resistive divider pulls it to ~30% above mid-supply (e.g., ~21V at ±70V), risking violation of the –3V to +7V OD-COM/TFLAG-COM absolute maximum rating. Always tie COM to low-voltage ground for safe interfacing.

Can the LTC6090HS8E-5#PBF drive 200pF capacitive loads stably?

Yes - the LTC6090HS8E-5#PBF is explicitly characterized to drive up to 200pF of load capacitance while maintaining stability at noise gain ≥5. However, layout parasitics and feedback network impedance significantly affect phase margin; always use low-inductance routing and consider small series resistance (e.g., 10–50Ω) in the feedback path for marginal cases.

What is the purpose of the exposed pad on the LTC6090HS8E-5#PBF SOIC-8E package, and how must it be connected?

The exposed pad (Pin 9) on the LTC6090HS8E-5#PBF is electrically connected to V– and serves as the primary thermal conduction path. It must be soldered to a PCB copper area tied to the V– plane using ≥4 thermal vias. Failure to do so raises θ_JA from ~33°C/W to >100°C/W, risking thermal shutdown or reliability degradation at full 140V supply.

Does the LTC6090HS8E-5#PBF provide overtemperature protection, and how does TFLAG interact with OD?

Yes - the LTC6090HS8E-5#PBF includes dual thermal protection: TFLAG asserts at 145°C (with 5°C hysteresis), and hard thermal shutdown triggers at 175°C. Connecting TFLAG directly to OD creates autonomous output disable - when TFLAG sinks current, OD is pulled low, disabling the output stage before junction temperature reaches 150°C.