INA819IDGKR – TEXAS INSTRUMENTS

The INA819IDGKR is a Texas Instruments precision, low-power, current feedback instrumentation amplifier housed in a small, 8-pin SOIC (D) package. It boasts a remarkably low input bias current of typically 10pA, crucial for high-impedance sensor applications. Its rail-to-rail output swing allows for maximum dynamic range, operating within a ±18V supply voltage range, although optimal performance is achieved between ±5V and ±15V. The device features a gain bandwidth product of 1.2MHz and a typical input offset voltage of only 25µV, ensuring high accuracy in signal amplification. Internal compensation eliminates the need for external components, simplifying design and reducing board space._x000D_
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Common applications include precision amplification of low-level signals from strain gauges, thermocouples, and other high-impedance transducers. The INA819IDGKR’s low input bias current minimizes errors caused by leakage currents, while its high common-mode rejection ratio (CMRR) effectively rejects noise and interference. Its current feedback architecture offers excellent stability and fast settling times, making it suitable for applications requiring high-speed signal processing. The low power consumption (typically 1.6mA at ±5V) makes it ideal for battery-powered or space-constrained designs. Engineers should consider this part when high accuracy, low noise, and minimal external components are paramount in instrumentation applications.