OPA827AID datasheet, price, pdf

OPA827 – Opamp Sound Characteristic

OPA827AID

OPA827AID is a low-noise, precision op-amp, ideal for applications that require high accuracy and low noise. With an input noise density of just 3.5nV/√Hz, it’s perfect for precise amplifications. Its offset voltage is as low as 50 μV, ensuring accuracy. With a gain bandwidth of 8 MHz, it handles higher-frequency signals easily. It has a very low input bias current of 1nA, which won’t affect your signal. It works with single supplies from 2.7V to 36V, making it great for low-power, portable systems. It’s perfect for audio amplifiers, sensor signal conditioning, or precision measurement instruments.

OPA827AID Pinout Diagram

OPA827AID Equivalent Precision Op Amp

If you don’t have an OPA827AID, consider INA333, AD8221, or LT1001 instead. INA333 has similar precision and lower power consumption—great for sensor applications—but its bandwidth is just 1MHz, so avoid high-speed designs. AD8221 matches OPA827AID in input offset and bias current, perfect for differential measurement circuits. LT1001 offers even higher precision but has lower bandwidth and current, ideal if you need accuracy rather than speed.

OPA827AID Amplifier Circuit Schematic

OPA827AID Audio Preamp Application

If you’re building a high-quality audio preamp, the OPA827AID is a fantastic choice. Its ultra-low noise (just 3.5nV/√Hz) means your sound stays clear and clean even at high amplification. With minimal offset voltage (around 5μV), it preserves the details and dynamics of your audio. The high gain (over 100dB) ensures accurate amplification without distortion. It’s perfect for microphone preamps, phono stages, guitar inputs, headphone amps, or DAC output buffers.

OPA827AID Low Noise Circuit Design

This circuit shows a classic low-noise amplifier, ideal for weak signals like sensors or microphones. A JFET transistor (JFE150) provides high input impedance and ultra-low noise buffering. After initial buffering, the signal is amplified further by an op-amp, with gain set by Rf and Rin. While the original schematic uses OPA202, replacing it with OPA827AID will significantly improve offset voltage (down to 5μV), lower input noise (3.5nV/√Hz), and increase bandwidth, giving you better signal clarity.

OPA827AID Signal Conditioning Usage

If you’re designing sensor interfaces, precise measurements, or ADC front-ends, the OPA827 is a great choice. Its FET inputs have very high impedance, perfect for high-resistance sensors. The ultra-low noise (3.5nV/√Hz) and minimal offset voltage (typical 5µV) ensure accurate and clean signals. You can use it as a voltage follower, active filter, or for offset adjustments to match your ADC range. It supports a wide supply range (±2.7V to ±18V), ideal for both portable and industrial applications.