Texas Instruments

OPA137UA

OPA137UA Description

The OPA137UA from Texas Instruments is a high-performance, general-purpose operational amplifier (op-amp) belonging to the MicroAmplifier™ series. Designed for precision and efficiency, it features a 1 MHz gain bandwidth product, 3.5V/µs slew rate, and ultra-low 5 pA input bias current, making it ideal for applications requiring high accuracy and minimal power consumption. Operating over a 4.5V to 36V supply range, the OPA137UA delivers 60 mA output current while consuming only 220µA supply current, ensuring optimal performance in both low-power and high-voltage scenarios. Packaged in an 8-SOIC tube, it is RoHS3 compliant and rated for MSL 3 (168 hours) moisture sensitivity, ensuring reliability in industrial environments.

OPA137UA Features

• Ultra-Low Input Bias Current (5 pA): Minimizes errors in high-impedance sensor interfaces.
• Wide Supply Voltage Range (4.5V–36V): Supports flexible power configurations.
• Low Power Consumption (220µA): Ideal for battery-operated and portable devices.
• High Output Drive (60 mA): Capable of driving heavier loads compared to similar op-amps.
• Low Offset Voltage (2.5 mV): Enhances precision in DC-coupled applications.
• Surface-Mount 8-SOIC Package: Compact and suitable for space-constrained designs.
• REACH Unaffected & ROHS3 Compliant: Meets stringent environmental and safety standards.

OPA137UA Applications

The OPA137UA excels in precision analog circuits, including:

• Sensor Signal Conditioning: Photodiode amplifiers, thermocouples, and strain gauges benefit from its low input bias current.
• Active Filters & Integrators: Its 1 MHz bandwidth ensures stable performance in frequency-selective circuits.
• Portable & Battery-Powered Systems: Low quiescent current extends battery life in medical devices and IoT sensors.
• High-Impedance Buffering: Ideal for pH meters, electrometer amplifiers, and other high-Z applications.
• Industrial Control Systems: Robust performance in 4-20mA loops, motor control feedback, and instrumentation amplifiers.

Conclusion of OPA137UA

The OPA137UA stands out as a versatile, precision op-amp with a unique blend of low power, high accuracy, and wide voltage operation. Its ultra-low input bias current and high output drive make it superior to many general-purpose op-amps, particularly in sensor interfaces and portable electronics. Whether for industrial automation, medical instrumentation, or energy-efficient designs, the OPA137UA delivers reliable performance while adhering to environmental and regulatory standards.