Overview
The AD797BRZ-REEL7, produced by Analog Devices Inc., is a very low noise, low distortion operational amplifier. It is ideally suited for use as a preamplifier due to its exceptional noise performance of 0.9 nV/√Hz and low total harmonic distortion of −120 dB in audio bandwidths. This amplifier is designed to provide a wide dynamic range, making it highly suitable for applications requiring high precision and low noise.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | ±5 V to ±15 V | ±5 | - | ±18 | V |
| Input Offset Voltage | ±5 V, ±15 V | 25 | 80 | 125 | μV |
| Input Bias Current | ±5 V, ±15 V | 0.25 | 1.5 | 3.0 | μA |
| Input Offset Current | ±5 V, ±15 V | 100 | 400 | 600 | nA |
| Open-Loop Gain | VOUT = ±10 V, RLOAD = 2 kΩ | 1 | 20 | - | V/μV |
| Slew Rate | - | - | 20 | - | V/μs |
| Gain Bandwidth | - | - | 110 MHz | - | - |
| Total Harmonic Distortion | RLOAD = 1 kΩ, f = 20 kHz, 3 V rms | -120 | -110 | - | dB |
| Output Current | ±5 V, ±15 V | 30 | 50 | - | mA |
| Quiescent Current | ±5 V, ±15 V | 8.2 | 10.5 | - | mA |
| Input Resistance (Differential) | - | - | 7.5 kΩ | - | kΩ |
| Input Capacitance (Differential) | - | - | 20 pF | - | pF |
Key Features
- Very low noise: 0.9 nV/√Hz
- Low total harmonic distortion: −120 dB in audio bandwidths
- High slew rate: 20 V/μs
- Wide gain bandwidth: 110 MHz
- High output current drive: up to 50 mA
- Wide power supply voltage range: ±5 V to ±15 V
- Excellent settling time: suitable for 16-bit applications
- Single ultrahigh gain stage for dc and dynamic precision
- Low input offset voltage and current
Applications
- Preamplifiers for microphones and mixing consoles
- Infrared (IR) and sonar imaging systems
- Ultrasound preamplifiers
- Seismic detectors
- Spectrum analyzers
- Buffering inputs to Σ-Δ ADCs or outputs of high resolution DACs
- Professional audio preamplifiers
Q & A
- What is the typical noise performance of the AD797BRZ-REEL7?
The AD797BRZ-REEL7 has a typical noise performance of 0.9 nV/√Hz.
- What is the total harmonic distortion of the AD797BRZ-REEL7 in audio bandwidths?
The total harmonic distortion is −120 dB in audio bandwidths.
- What is the slew rate of the AD797BRZ-REEL7?
The slew rate is 20 V/μs.
- What is the gain bandwidth of the AD797BRZ-REEL7?
The gain bandwidth is 110 MHz.
- What is the maximum output current of the AD797BRZ-REEL7?
The maximum output current is up to 50 mA.
- What is the operating power supply voltage range of the AD797BRZ-REEL7?
The operating power supply voltage range is ±5 V to ±15 V.
- What are some common applications of the AD797BRZ-REEL7?
Common applications include preamplifiers for microphones and mixing consoles, IR and sonar imaging systems, ultrasound preamplifiers, seismic detectors, and spectrum analyzers.
- How does the AD797BRZ-REEL7 achieve its high precision and low noise performance?
The AD797BRZ-REEL7 uses a single ultrahigh gain stage to achieve both dc and dynamic precision, leveraging the inherent matching of devices fabricated on the same IC chip.
- What is the input resistance and capacitance of the AD797BRZ-REEL7?
The input resistance is 7.5 kΩ (differential) and 100 MΩ (common mode), and the input capacitance is 20 pF (differential) and 5 pF (common mode).
- What is the quiescent current of the AD797BRZ-REEL7?
The quiescent current is 8.2 to 10.5 mA.
