Overview
The AD797AR-REEL, produced by Analog Devices Inc., is a very low noise, low distortion operational amplifier designed for use as a preamplifier. It is renowned for its exceptional performance in applications requiring high dynamic range and low noise. The AD797 features a low noise level of 0.9 nV/√Hz and a total harmonic distortion of −120 dB at audio bandwidths, making it ideal for professional audio equipment, imaging systems, and other critical applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | ±5 V, ±15 V | ±5 | - | ±18 | V |
| Input Offset Voltage | ±5 V, ±15 V | 25 | 80 | 180 | μV |
| Input Bias Current | ±5 V, ±15 V | 0.25 | 1.5 | 3.0 | μA |
| Input Offset Current | ±5 V, ±15 V | 100 | 400 | 700 | nA |
| Open-Loop Gain | VOUT = ±10 V, RLOAD = 2 kΩ | 1 | 20 | - | V/μV |
| Gain Bandwidth | G = 1000 | - | 110 | - | MHz |
| Slew Rate | - | - | 20 | - | V/μs |
| Full Power Bandwidth | 20 V p-p | - | 280 | - | kHz |
| Output Current | |VS − VOUT| > 4 V, AOL > 200 kΩ | - | - | 50 | mA |
| Quiescent Current | ±5 V, ±15 V | 8.2 | 10.5 | - | mA |
Key Features
- Low noise: 0.9 nV/√Hz typical input voltage noise at 1 kHz.
- Low total harmonic distortion: −120 dB at audio bandwidths.
- Excellent AC characteristics: 110 MHz gain bandwidth (G = 1000), 8 MHz bandwidth (G = 10), and 280 kHz full power bandwidth at 20 V p-p.
- High slew rate: 20 V/μs.
- Excellent DC precision: 80 μV maximum input offset voltage and 1.0 μV/°C VOS drift.
- High output drive current: up to 50 mA.
- Fast settling time: 800 ns to 16 bits (10 V step).
Applications
- Professional audio preamplifiers.
- IR, CCD, and sonar imaging systems.
- Spectrum analyzers.
- Ultrasound preamplifiers.
- Seismic detectors.
- Σ-Δ ADC/DAC buffers.
Q & A
- What is the typical input voltage noise of the AD797?
The AD797 has a typical input voltage noise of 0.9 nV/√Hz at 1 kHz. - What is the total harmonic distortion of the AD797 at audio bandwidths?
The total harmonic distortion of the AD797 is −120 dB at audio bandwidths. - What is the gain bandwidth of the AD797?
The gain bandwidth of the AD797 is 110 MHz (G = 1000). - What is the slew rate of the AD797?
The slew rate of the AD797 is 20 V/μs. - What is the maximum input offset voltage of the AD797?
The maximum input offset voltage of the AD797 is 80 μV. - What is the output drive current capability of the AD797?
The AD797 can drive up to 50 mA of output current. - What is the settling time of the AD797 to 16 bits?
The settling time of the AD797 to 16 bits is 800 ns for a 10 V step. - What are some common applications of the AD797?
The AD797 is commonly used in professional audio preamplifiers, IR and sonar imaging systems, spectrum analyzers, ultrasound preamplifiers, seismic detectors, and Σ-Δ ADC/DAC buffers. - What is the operating temperature range of the AD797?
The operating temperature range of the AD797 is −40°C to +85°C for the AD797A/B and −55°C to +125°C for the AD797S. - What is the power supply voltage range for the AD797?
The power supply voltage range for the AD797 is ±5 V to ±18 V.
