Analog Devices Inc. LT1492CS8#TRPBF

Overview

LT1492CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual precision operational amplifier optimized for low-power, single-supply operation with 5MHz gain-bandwidth product, 3V/µs slew rate, and 450µA quiescent supply current per amplifier. It features 180µV max input offset voltage, rail-to-rail output swing to ground while sinking current, and operates from 2.5V to 36V total supply - ideal for battery-powered instrumentation and portable analog signal conditioning.

For engineers reviewing the LT1492CS8#TRPBF datasheet, LT1492CS8#TRPBF pinout, LT1492CS8#TRPBF application, or LT1492CS8#TRPBF equivalent, key selection criteria include input offset voltage drift (≤3µV/°C), output drive capability (≥20mA), wide common-mode input range (to ground), and guaranteed performance at 3.3V, 5V, and ±15V supplies.

Technical Context

The LT1492CS8#TRPBF employs a proprietary bipolar input stage enabling precision DC performance (180µV V_OS max) while maintaining high-speed AC response (5MHz GBW). Its input stage tolerates common-mode voltages extending 400mV below V– without phase reversal, and its output drives ≥20mA while swinging within 3mV of V– and 0.65V of V+ under no load.

Designed for single-supply systems, it supports rail-to-ground output operation with sinking capability, features low input noise (16.5nV/√Hz at 1kHz), and maintains stability with capacitive loads up to 1000pF depending on load current - verified across –40°C to 85°C operating temperature range.

Key Specifications

Pinout & Package

LT1492CS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package, 3.9mm × 4.9mm body, 1.27mm pitch, with JEDEC MS-012AC outline. Thermal resistance θ_JA = 190°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual precision op amp applications.

Compared with LT1366CS8#TRPBF and LT1212CN8#PBF, the LT1492CS8#TRPBF delivers optimal balance of precision (180µV V_OS), speed (5MHz), and ultra-low quiescent current (450µA) - making it uniquely suited for battery-powered instrumentation requiring both DC accuracy and moderate AC performance.

Availability

LT1492CS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, photodiode signal chains, and DAC current-to-voltage conversion requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for LT1492CS8#TRPBF 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 to manufacture and support its precision analog portfolio with full backward compatibility and extended product longevity.

The LT1492CS8#TRPBF belongs to Linear's legacy dual/quad precision op amp family, designed specifically for low-power, single-supply applications demanding high DC accuracy, wide supply flexibility, and robust output drive - targeting portable test equipment and sensor interface systems.

FAQ

What is the maximum operating supply voltage for LT1492CS8#TRPBF?

The LT1492CS8#TRPBF supports a total supply voltage range of 2.5V to 36V. This means it can operate on single supplies from 2.5V to 36V (e.g., 3.3V, 5V, 12V, 24V) or split supplies such as ±2.5V to ±18V. Absolute maximum rating is 36V between V+ and V– pins; exceeding this risks permanent damage. Operation at 2.5V is fully specified with guaranteed performance including input common-mode range and output swing.

Does LT1492CS8#TRPBF support rail-to-rail input operation?

No, the LT1492CS8#TRPBF does not support rail-to-rail input. Its input common-mode range extends to V– (ground) and up to V+ – 1.2V at room temperature, with full precision performance recommended between V– and V+ – 1.5V. While inputs can be driven 400mV below V– without phase reversal, input bias current increases significantly outside the specified common-mode range. For true rail-to-rail input, consider alternatives like LT1366CS8#TRPBF.

Can LT1492CS8#TRPBF drive a 1kΩ load at 5V supply?

Yes, the LT1492CS8#TRPBF can drive a 1kΩ load at 5V supply. At ISINK = 15mA, the output low voltage is guaranteed ≤0.500V, and at ISOURCE = 15mA, output high is ≥3.0V - delivering >2.5V swing across 1kΩ. The device specifies ≥20mA minimum output current per amplifier, and thermal calculations (θ_JA = 190°C/W) confirm safe operation at ambient temperatures ≤70°C with proper PCB copper area. Derating applies above 70°C ambient.

What is the typical input noise performance of LT1492CS8#TRPBF?

The LT1492CS8#TRPBF exhibits 16.5nV/√Hz input voltage noise density at 1kHz and 17.3nV/√Hz at 10Hz, with 0.14pA/√Hz input current noise density at 1kHz. Its 0.1Hz–10Hz peak-to-peak input voltage noise is 330nV, making it suitable for low-frequency precision applications like strain gauge amplification and thermocouple conditioning where 1/f noise dominates. These values are measured at V_S = 5V, T_A = 25°C, and are representative of all units in the LT1492/LT1493 family.

Is LT1492CS8#TRPBF suitable for use as a comparator?

The LT1492CS8#TRPBF can be used as a comparator in non-critical applications due to its rail-to-ground output and TTL/CMOS-compatible logic levels on single 3.3V or 5V supplies. However, it is not optimized for comparator use: propagation delay is ~100ns, and response time strongly depends on input overdrive. Without hysteresis, output transition times may cause logic oscillation. For dedicated comparator functions, Linear's LTC1540 or LT1719 are better suited - but LT1492CS8#TRPBF remains viable where speed is secondary to precision and shared BOM usage.