Texas Instruments

INA115AU

INA115AU Description

The INA115AU from Texas Instruments is a high-precision instrumentation amplifier designed for demanding signal conditioning applications. Packaged in a 16-SOIC surface-mount form factor, this single-channel IC delivers exceptional accuracy with an ultra-low input bias current (500 pA) and minimal input offset voltage (25 µV). Operating over a 4.5V to 36V supply range, it supports wide dynamic signal acquisition while consuming only 2.2mA supply current, making it suitable for both portable and industrial systems. Its 1MHz bandwidth and 0.6V/µs slew rate ensure fast signal response, while ROHS3 compliance and REACH unaffected status align with environmental regulations.

INA115AU Features

• Low Noise & High Precision: 25 µV offset voltage and 500 pA bias current for accurate signal amplification.
• Wide Supply Range: 4.5V–36V operation, ideal for battery-powered and industrial systems.
• High Output Drive: 20mA output current capability for driving heavy loads.
• Stable Performance: MSL3-rated (168-hour moisture resistance) for robust handling.
• Integrated Design: Eliminates external components with built-in gain setting (via external resistors).
• Low Power Consumption: 2.2mA quiescent current balances performance and efficiency.

INA115AU Applications

The INA115AU excels in applications requiring precision amplification of low-level signals:

• Medical Instrumentation: ECG amplifiers, patient monitoring systems.
• Industrial Sensors: Strain gauges, bridge amplifiers, and pressure transducers.
• Test & Measurement: Data acquisition systems, precision voltage/current sensing.
• Automotive Systems: Sensor signal conditioning in harsh environments.
• Portable Devices: Battery-operated equipment due to low power draw.

Conclusion of INA115AU

The INA115AU stands out as a versatile, high-performance instrumentation amplifier with industry-leading precision and robustness. Its wide supply range, low noise, and integrated design reduce system complexity while ensuring reliability in critical applications. Whether for medical, industrial, or portable electronics, the INA115AU delivers superior signal integrity and ease of integration, making it a preferred choice over discrete solutions or lower-spec alternatives.