Analog Devices Inc. LT1802CS#PBF

Overview

LT1802CS#PBF from Analog Devices (formerly Linear Technology) is a quad rail-to-rail input/output precision operational amplifier optimized for low-voltage, high-speed signal conditioning. It delivers 80MHz gain bandwidth, 25V/µs slew rate, <350µV input offset voltage, and operates from 2.3V to 12.6V single or ±5V dual supplies - enabling high-fidelity buffering in data acquisition front-ends and sensor interfaces.

For engineers reviewing the LT1802CS#PBF datasheet, LT1802CS#PBF pinout, LT1802CS#PBF application, or LT1802CS#PBF equivalent, key selection criteria include rail-to-rail output swing within 20mV of rails at 5mA load, 2mA/amplifier quiescent current, 8.5nV/√Hz input voltage noise, and guaranteed performance across –40°C to 85°C industrial temperature range.

Technical Context

The LT1802CS#PBF uses a dual-input-stage architecture (PNP + NPN) to achieve rail-to-rail common-mode input range (V– to V+), with automatic crossover at ~1.2V below V+. Its complementary common-emitter output stage enables true rail-to-rail output swing, maintaining linearity down to 20mV from either supply rail under 5mA load.

It features internal compensation for unity-gain stability, supports driving capacitive loads up to 1000pF with series output resistor optimization, and maintains >70MHz GBW and >20V/µs slew rate across –40°C to 85°C. Input bias current remains <250nA over 0.2V above V– to 1.2V below V+, critical for high-impedance transducer interfacing.

Key Specifications

Pinout & Package

LT1802CS#PBF is housed in a 14-lead plastic SO (Small Outline) package with standard quad op amp pinout and exposed thermal pad internally connected to V–. The package supports surface-mount reflow and provides θ_JA = 190°C/W for thermal management in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OP482ARZ and TLV2464IDR, LT1802CS#PBF uniquely combines 80MHz bandwidth, 25V/µs slew rate, and <350µV offset in a quad SO-14 package - making it the only option among the three capable of driving 10-bit+ ADCs at >1MSPS without gain/offset calibration.

Availability

LT1802CS#PBF is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LT1802CS#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 high-performance analog portfolio, emphasizing precision, speed, and reliability in signal chain ICs.

The LT1802CS#PBF belongs to Linear's precision high-speed op amp family, designed specifically for applications demanding rail-to-rail operation, low noise, and wide bandwidth in space-constrained industrial and medical systems.

FAQ

What is the maximum operating supply voltage for LT1802CS#PBF?

The LT1802CS#PBF supports a total supply voltage range of 2.3V to 12.6V, meaning it operates on single supplies from 2.3V to 12.6V or dual supplies up to ±6.3V. Absolute maximum ratings specify ±6.3V or 12.6V total, and exceeding this risks permanent damage. Operation at 12.6V is validated across –40°C to 85°C.

Does LT1802CS#PBF support rail-to-rail input common-mode range?

Yes, LT1802CS#PBF guarantees rail-to-rail input common-mode range from V– to V+, achieved via dual PNP/NPN input stages that auto-switch near 1.2V below V+. This is confirmed in the Electrical Characteristics table and Applications Information section, enabling direct connection to sensors referenced to either supply rail.

What is the typical output drive capability of LT1802CS#PBF at 5V supply?

At VS = 5V, LT1802CS#PBF delivers typical output swing within 20mV of both rails under no load, and sustains ≥4.8V output swing at 5mA sink/source load. Short-circuit current is rated at 45mA minimum, allowing robust driving of 50Ω video lines or 1kΩ ADC input networks without external buffers.

Is LT1802CS#PBF unity-gain stable?

Yes, LT1802CS#PBF is internally compensated for unity-gain stability across all operating conditions. The datasheet specifies stable operation at AV = 1 with 1kΩ load and 10pF capacitive load, and Figure G22 confirms >60° phase margin at unity gain. No external compensation is required for standard non-inverting or inverting configurations.

How does LT1802CS#PBF perform in high-temperature industrial environments?

LT1802CS#PBF is rated for –40°C to 85°C operation with full parameter guarantees. Key specs including 80MHz GBW, 25V/µs slew rate, and 350µV V_OS max are validated across this range. Thermal resistance θ_JA = 190°C/W (SO-14) enables reliable operation at 85°C ambient when power dissipation remains ≤340mW - verified in the Power Dissipation section.