Overview
The AD797ARZ, produced by Analog Devices Inc., is a very low noise, low distortion operational amplifier. It is ideal for use as a preamplifier, particularly in applications requiring high dynamic range and precision. The AD797 is characterized by its low noise of 0.9 nV/√Hz and low total harmonic distortion of −120 dB in audio bandwidths, making it suitable for use in microphones, mixing consoles, and other critical audio applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±5 | ±15 | V | |
| Input Offset Voltage | 25 | 80 | 180 | μV |
| Input Bias Current | 0.25 | 1.5 | 3.0 | μA |
| Input Offset Current | 100 | 400 | 700 | nA |
| Open-Loop Gain | 1 | 20 | V/μV | |
| Slew Rate | 20 | V/μs | ||
| Gain Bandwidth | 110 | MHz | ||
| Output Current Drive | 50 | mA | ||
| Power Supply Rejection Ratio (PSRR) | 130 | dB | ||
| Input Capacitance (Differential) | 20 | pF | ||
| Package | 8-SOIC (0.154, 3.90mm Width) |
Key Features
- Low Noise and Distortion: The AD797 features a low noise of 0.9 nV/√Hz and low total harmonic distortion of −120 dB in audio bandwidths, making it ideal for high-fidelity audio applications.
- High Slew Rate and Gain Bandwidth: With a slew rate of 20 V/μs and a gain bandwidth of 110 MHz, the AD797 is highly suitable for low-frequency ultrasound and other high-speed applications.
- High Output Current Drive: The AD797 can drive up to 50 mA per channel, making it versatile for various load conditions.
- Wide Power Supply Range: The device operates over a supply voltage range of ±5 V to ±15 V, providing flexibility in different circuit designs.
- High PSRR and CMRR: The AD797 has a high power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) of 130 dB, ensuring stable operation despite power supply fluctuations.
Applications
- Audio Preamps: Ideal for use in microphones and mixing consoles due to its low noise and distortion characteristics.
- High Resolution DACs and ADCs: Suitable for buffering the inputs to Σ-Δ ADCs or the outputs of high resolution DACs, especially in critical applications such as seismic detection or spectrum analyzers.
- Imaging Systems: Used in infrared (IR) and sonar imaging applications where a wide dynamic range is necessary.
- Ultrasound Applications: Its high slew rate and gain bandwidth make it highly suitable for low-frequency ultrasound applications.
Q & A
- What is the typical input noise voltage of the AD797?
The typical input noise voltage of the AD797 is 0.9 nV/√Hz.
- What is the slew rate of the AD797?
The slew rate of the AD797 is 20 V/μs.
- What is the gain bandwidth of the AD797?
The gain bandwidth of the AD797 is 110 MHz.
- What is the maximum output current drive of the AD797?
The AD797 can drive up to 50 mA per channel.
- What is the power supply range for the AD797?
The AD797 operates over a supply voltage range of ±5 V to ±15 V.
- What are the typical applications of the AD797?
The AD797 is typically used in audio preamps, high resolution DACs and ADCs, imaging systems, and ultrasound applications.
- What is the input offset voltage of the AD797?
The input offset voltage of the AD797 is typically 80 μV.
- What is the power supply rejection ratio (PSRR) of the AD797?
The PSRR of the AD797 is 130 dB.
- What is the package type of the AD797ARZ?
The AD797ARZ comes in an 8-SOIC package (0.154, 3.90mm Width).
- What is the quiescent current of the AD797?
The quiescent current of the AD797 is typically 10.5 mA.
