Analog Devices Inc. LTC6090IS8E#PBF

Overview

LTC6090IS8E#PBF from Analog Devices (formerly Linear Technology) is a high-voltage, precision rail-to-rail output CMOS op amp with ±70V supply capability, 50pA max input bias current, 1.25mV max offset voltage, and 12MHz gain-bandwidth product. It operates across –40°C to +85°C and is used in high-impedance photodiode amplifiers, piezo drivers, and high-voltage DAC buffering where precision, low noise, and thermal safety are critical.

For engineers reviewing the LTC6090IS8E#PBF datasheet, LTC6090IS8E#PBF pinout, LTC6090IS8E#PBF application, or LTC6090IS8E#PBF equivalent, key selection criteria include guaranteed operation at ±70V supplies, picoamp-level input bias over full temperature range, thermal warning flag (TFLAG) activation at 145°C, and SOIC-8E package with exposed V– pad for thermal management.

Technical Context

The LTC6090IS8E#PBF implements a proprietary high-voltage CMOS process enabling rail-to-rail output swing while maintaining 11nV/√Hz input voltage noise density and 3.5μV_P-P 0.1Hz–10Hz noise. Its internal die temperature sensor drives an open-drain TFLAG output that activates at 145°C with 5°C hysteresis.

It features an active-low output disable (OD) pin referenced to COM, allowing logic-level control of the output stage without powering down input circuitry. The COM pin establishes a low-voltage reference for OD and TFLAG interfacing, with internal Zener protection limiting OD–COM and TFLAG–COM differential voltage to ±3V to ±7V.

Key Specifications

Pinout & Package

The LTC6090IS8E#PBF is housed in an 8-lead SOIC package with exposed pad (S8E), where Pin 9 (exposed pad) is electrically connected to V– and must be soldered to the PCB for thermal performance (θ_JC = 5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA454IDDA and ADA4700-1ARMZ, the LTC6090IS8E#PBF uniquely combines ±70V operation, picoamp input bias, integrated thermal warning (TFLAG), and output disable (OD) in a thermally enhanced SOIC-8E - making it optimal for space-constrained, safety-critical high-voltage instrumentation.

Availability

LTC6090IS8E#PBF is available at Aetrix Electronics and suitable for photodiode amplification, piezo actuation, and high-voltage DAC buffering requiring stable component supply across industrial temperature ranges.

Supply support for LTC6090IS8E#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 continues its legacy of high-performance analog ICs for precision, power, and signal conditioning applications.

The LTC6090 series belongs to Linear's high-voltage precision op amp product line, designed specifically for applications demanding rail-to-rail output, ultra-low input bias, and robust thermal protection in ±70V systems.

FAQ

What is the maximum supply voltage rating for the LTC6090IS8E#PBF?

The LTC6090IS8E#PBF has an absolute maximum total supply voltage of 150V (V+ to V–), with recommended operating range from ±4.75V to ±70V (140V). Operation beyond ±70V risks exceeding safe operating area limits and may trigger thermal shutdown at 175°C. Always observe derating curves in the datasheet for sustained high-voltage operation.

Does the LTC6090IS8E#PBF support rail-to-rail input common-mode voltage?

No, the LTC6090IS8E#PBF does not support rail-to-rail input. Its specified input common-mode range is V– +3V to V+ –3V, guaranteed by CMRR testing. Attempting to operate outside this range degrades CMRR and may cause unpredictable offset behavior or input stage saturation.

How is the COM pin used in LTC6090IS8E#PBF circuits?

The COM pin on the LTC6090IS8E#PBF serves as the reference node for OD and TFLAG logic levels. It should be tied to low-voltage ground when interfacing with microcontrollers or FPGA I/O. If left floating, an internal resistor divider pulls it to ~30% above mid-supply, risking violation of OD–COM and TFLAG–COM voltage limits (–3V to +7V).

Can the LTC6090IS8E#PBF drive 200pF loads stably?

Yes, the LTC6090IS8E#PBF is characterized to drive up to 200pF of capacitive load while maintaining stability, as confirmed in the datasheet's small-signal frequency response plots. For optimal phase margin, use feedback compensation techniques such as adding a small capacitor (e.g., 1–2pF) across the feedback resistor in high-gain configurations.

What happens to the output stage when the OD pin is asserted on the LTC6090IS8E#PBF?

When the OD pin voltage falls ≤0.65V below the COM pin voltage, the LTC6090IS8E#PBF disables its output stage while keeping input bias and offset circuitry active. This reduces supply current to ~580µA (typical), preserves input offset stability, and allows fast re-enablement (<1µs settling) without full power-up delay.