Overview
The AD797AN, 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 AD797AN features an exceptionally low noise level of 0.9 nV/√Hz and a total harmonic distortion of −120 dB at audio bandwidths, making it suitable for professional audio equipment, such as microphones and mixing consoles. Additionally, its high slew rate of 20 V/μs and a gain bandwidth product of 110 MHz enhance its performance in various high-frequency applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage | ±5 V, ±15 V | 25 | 80 | 125/180 | μV |
| Offset Voltage Drift | ±5 V, ±15 V | 0.2 | 1.0 | 0.6 | μV/°C |
| Input Bias Current | ±5 V, ±15 V | 0.25 | 1.5 | 3.0 | μA |
| Input Offset Current | ±5 V, ±15 V | 100 | 400 | 600/700 | nA |
| Open-Loop Gain | VOUT = ±10 V, RLOAD = 2 kΩ | 1 | 20 | 15 | V/μV |
| Gain Bandwidth Product | G = 1000, ±15 V | 110 | 110 | - | MHz |
| Slew Rate | - | - | 20 | - | V/μs |
| Power Supply Voltage | - | ±5 | ±15 | ±18 | V |
| Quiescent Current | ±5 V, ±15 V | 8.2 | 10.5 | - | mA |
| Output Current Drive | - | - | 50 | - | mA |
Key Features
- Very low noise: 0.9 nV/√Hz
- Low total harmonic distortion: −120 dB at audio bandwidths
- High slew rate: 20 V/μs
- High gain bandwidth product: 110 MHz
- Excellent DC precision: 80 μV max input offset voltage
- High output drive current: up to 50 mA
- Single ultrahigh gain stage for improved dynamic performance
- Advanced Complementary Bipolar (CB) process for enhanced performance
Applications
- Professional audio preamplifiers
- IR, CCD, and sonar imaging systems
- Spectrum analyzers
- Ultrasound preamplifiers
- Seismic detectors
- ADC/DAC buffers
Q & A
- What is the typical noise level of the AD797AN?
The AD797AN has a typical noise level of 0.9 nV/√Hz.
- What is the total harmonic distortion of the AD797AN at audio bandwidths?
The total harmonic distortion is −120 dB at audio bandwidths.
- What is the slew rate of the AD797AN?
The slew rate is 20 V/μs.
- What is the gain bandwidth product of the AD797AN?
The gain bandwidth product is 110 MHz.
- What is the maximum input offset voltage of the AD797AN?
The maximum input offset voltage is 80 μV.
- What is the output current drive capability of the AD797AN?
The AD797AN can drive up to 50 mA of output current.
- What is the power supply voltage range for the AD797AN?
The power supply voltage range is ±5 V to ±18 V.
- What are some common applications of the AD797AN?
Common applications include professional audio preamplifiers, IR and sonar imaging systems, spectrum analyzers, ultrasound preamplifiers, seismic detectors, and ADC/DAC buffers.
- What process technology is used in the AD797AN?
The AD797AN is fabricated using Analog Devices’ advanced Complementary Bipolar (CB) process.
- How does the AD797AN achieve its high dynamic performance?
The AD797AN uses a single ultrahigh gain stage to achieve both DC and dynamic precision, eliminating second-stage noise effects and improving settling time and distortion.
