The MAX4091ASA+ is a precision general-purpose operational amplifier manufactured by Analog Devices/Maxim Integrated, designed to address critical design challenges in low-power, single-supply applications where rail-to-rail operation and precision performance are essential. This integrated circuit belongs to the linear amplifiers category, specifically classified as an instrumentation, operational, and buffer amplifier solution.
This single-circuit operational amplifier excels in applications requiring exceptional precision with its ultra-low input bias current of 20 nA and minimal input offset voltage of 30 µV, making it ideal for high-impedance sensor interfaces and precision measurement systems. The device operates from a wide supply voltage range of 2.7V to 6V, enabling flexible implementation in both battery-powered and standard supply applications. Its rail-to-rail output capability ensures maximum signal swing utilization, particularly valuable in single-supply designs where every bit of dynamic range matters.
The amplifier features a gain bandwidth product of 500 kHz with a slew rate of 0.2 V/µs, providing adequate performance for precision DC and low-frequency AC applications. The remarkably low supply current of 130 µA makes it exceptionally suitable for portable and battery-operated equipment where power consumption is critical. Operating reliably across an extended temperature range from -40°C to 125°C, this device meets the demands of industrial, automotive, and harsh environment applications.
Housed in a compact 8-SOIC surface-mount package measuring 0.154" (3.90mm) in width, the MAX4091ASA+ offers space-efficient PCB implementation while maintaining excellent thermal and electrical performance. The device is RoHS3 compliant, ensuring environmental compliance for modern electronic designs. As part of the Beyond-the-Rails series, this amplifier incorporates advanced input stage design that allows input signals to exceed the supply rails without damage or performance degradation.
Primary applications include precision sensor signal conditioning, battery monitoring circuits, portable instrumentation, data acquisition systems, active filters, and voltage reference buffering. The combination of low power consumption, precision specifications, and rail-to-rail operation makes it particularly well-suited for medical devices, handheld test equipment, and IoT sensor nodes where both accuracy and battery life are paramount.
Equivalent and alternative models include the MAX4090 series variants such as MAX4090ASA+ (dual amplifier version), MAX4092ASA+ (quad amplifier configuration), and competitive alternatives like the Texas Instruments OPA333 series, Microchip MCP6001 family, and STMicroelectronics TSV911 series. Other comparable precision amplifiers include the Linear Technology LTC2050 series (now part of Analog Devices), Analog Devices AD8628 family, and the Maxim MAX44251 series, each offering similar precision characteristics with varying power consumption, bandwidth, and package options to suit different application requirements.
MAX4091ASA+ Key Technical Attributes
MAX4091ASA+
8-SOIC Package
Single-Channel General Purpose Op Amp
MAX4091ASA+ Packing Size
The MAX4091ASA+ is available in an 8-SOIC (Small Outline Integrated Circuit) package, with a width of 3.90 mm (0.154"). This surface-mount type device is supplied in tube packaging, ideal for volume assembly and optimized storage. It features 8 pins with standard SOIC thermal and mechanical characteristics, ensuring dependable performance in automated soldering environments. The SOIC package supports effective heat dissipation within the specified -40°C to 125°C operating temperature range.
MAX4091ASA+ Application
This op amp is designed for precision analog signal conditioning, making it suitable for sensor interfaces, medical electronics, industrial control, portable instrumentation, and battery-powered systems. Its Beyond-the-Rails series architecture enables operation close to ground and supply rails, which is highly valued in low-power and precision-critical designs.
MAX4091ASA+ Features
The MAX4091ASA+ operates as a general-purpose, high-precision operational amplifier. It exhibits a low input bias current of 20 nA and a typical input offset voltage of 30 µV, supporting accurate and stable signal amplification. The device boasts a wide supply voltage range from 2.7 V to 6 V, allowing flexible integration into a variety of platform voltages. With a rail-to-rail output, it ensures the widest possible output voltage swing for max dynamic range. The amplifier offers a slew rate of 0.2 V/µs and a gain bandwidth product of 500 kHz, suitable for both AC and DC signal processing. Designed with a single amplification circuit, it is optimized for low-power consumption with a supply current of 130 µA, making it suitable for energy-efficient applications. The device is compliant with RoHS3 regulations, confirming its lead-free and environmentally friendly construction.
MAX4091ASA+ Quality and Safety Features
RoHS3 compliance assures that the MAX4091ASA+ is free from hazardous substances, ensuring environmental safety and legal conformity for global markets. The device’s robust temperature range (-40°C to 125°C), strong ESD tolerance, and reliable SOIC package construction contribute to long-term operational safety and durability in demanding application scenarios.
MAX4091ASA+ Compatibility
This product is part of the Analog Devices / Maxim Integrated Beyond-the-Rails series, guaranteeing seamless compatibility with similar op amp and signal processing devices in the family. Its standard 8-SOIC package ensures compatibility with widely used PCB layouts, and its general-purpose nature makes it an ideal fit for system upgrades, drop-in replacements, or circuit expansions where high-performance analog amplification is required.
MAX4091ASA+ Datasheet PDF
For in-depth design references, precise electrical characteristics, and application guidelines, we provide the most authoritative and up-to-date datasheet for the MAX4091ASA+ directly on our website. We highly recommend downloading the official datasheet on this page to ensure accurate and optimal product integration.
Quality Distributor
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