Overview
The AD797BRZ-REEL, manufactured by Analog Devices Inc., is a high-performance operational amplifier (op-amp) renowned for its very low noise and low distortion characteristics. This op-amp is ideal for use as a preamplifier, particularly in applications requiring high dynamic range and precision signal processing. The AD797 is part of Analog Devices' portfolio of precision operational amplifiers and is well-suited for various analog signal processing tasks, including preamps in microphones, mixing consoles, and other high-precision applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Analog Devices | |
| Part Number | AD797BRZ-REEL | |
| Type | Operational Amplifier (Op-Amp) | |
| Supply Voltage | ±4.5 V to ±18 V | V |
| Input Offset Voltage (Vos) | Max ±1.5 mV (25°C) | mV |
| Input Bias Current (Ib) | Max 1 nA (25°C) | nA |
| Input Noise Voltage (en) | Typ 0.9 nV/√Hz (1 kHz) | nV/√Hz |
| Gain Bandwidth Product (GBW) | Min 75 MHz (AV = 1, RL = 2 kΩ) | MHz |
| Slew Rate (SR) | Min 20 V/μs (AV = 1, VOUT = ±10 V) | V/μs |
| Output Current | Max 50 mA | mA |
| Total Harmonic Distortion (THD) | −120 dB (RLOAD = 1 kΩ, f = 20 kHz, 3 V rms) | dB |
Key Features
- Low Noise and Distortion: The AD797 features a low noise voltage of 0.9 nV/√Hz and a total harmonic distortion of −120 dB, making it ideal for high-precision applications.
- High Slew Rate: With a slew rate of 20 V/μs, the AD797 is well-suited for high-speed signal processing and amplification.
- Excellent DC Precision: The AD797 offers good DC precision with a maximum input offset voltage of 80 μV and a VOS drift of 1.0 μV/°C.
- Wide Supply Voltage Range: It operates with ±5 V to ±18 V power supplies, providing flexibility in various circuit designs.
- High Output Drive Current: The AD797 can provide a high output drive current of 50 mA, making it suitable for applications with high current requirements.
- Fast Settling Time: The AD797 has a fast 16-bit settling time, which is crucial for buffering inputs to Σ-Δ ADCs or outputs of high-resolution DACs.
Applications
- Preamplifiers in Audio Equipment: Ideal for preamps in microphones and mixing consoles due to its low noise and low distortion characteristics.
- Low Frequency Ultrasound Applications: The high slew rate and gain bandwidth product make it suitable for low-frequency ultrasound applications.
- Infrared (IR) and Sonar Imaging: The wide dynamic range and low distortion make it useful in IR and sonar imaging applications.
- Buffering for Σ-Δ ADCs and High-Resolution DACs: Excellent for buffering the inputs to Σ-Δ ADCs or the outputs of high-resolution DACs, especially in precision applications like seismic detection and spectrum analyzers.
- General-Purpose Amplification: Versatile and reliable for various electronic circuits requiring low noise, low distortion, and high precision.
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 at 1 kHz.
- What is the slew rate of the AD797?
The slew rate of the AD797 is 20 V/μs.
- What is the maximum output current of the AD797?
The maximum output current of the AD797 is 50 mA.
- What is the total harmonic distortion of the AD797 at 20 kHz?
The total harmonic distortion of the AD797 at 20 kHz is −120 dB.
- What is the operating supply voltage range of the AD797?
The AD797 operates with supply voltages ranging from ±4.5 V to ±18 V.
- What are some common applications of the AD797?
The AD797 is commonly used in preamplifiers for audio equipment, low-frequency ultrasound applications, IR and sonar imaging, and buffering for Σ-Δ ADCs and high-resolution DACs.
- Why is the AD797 suitable for high-precision applications?
The AD797 is suitable for high-precision applications due to its low noise, low distortion, excellent DC precision, and fast settling time.
- Can the AD797 be used in general-purpose amplification?
Yes, the AD797 can be used in various general-purpose amplification tasks due to its high output drive current and wide supply voltage range.
- What is the input offset voltage of the AD797?
The maximum input offset voltage of the AD797 is ±1.5 mV at 25°C.
- How does the AD797 handle high-speed signal processing?
The AD797 handles high-speed signal processing effectively due to its high slew rate of 20 V/μs and a gain bandwidth product of 75 MHz.
