Overview
The AD8620BRZ-REEL, produced by Analog Devices Inc., is a precision, very low noise, low input bias current operational amplifier. It is part of the AD8610/AD8620 family, known for its high performance and stability. The AD8620 is manufactured using the XFCB (eXtra fast complementary bipolar) process, which combines dielectrically isolated N-channel JFET technology and thin film resistors to achieve high precision and low noise. This amplifier is ideal for applications requiring high accuracy, low noise, and fast settling times.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value |
|---|---|---|---|
| Offset Voltage (VOS) | 80 μV | 45 μV | 150 μV |
| Input Bias Current (IB) | 10 pA | -10 pA | +10 pA |
| Input Offset Current (IOS) | 1 pA | -10 pA | +10 pA |
| Common-Mode Rejection Ratio (CMRR) | 90 dB | 90 dB | 95 dB |
| Large Signal Voltage Gain (AVO) | 100 V/mV | 100 V/mV | 180 V/mV |
| Slew Rate (SR) | 50 V/μs | 40 V/μs | 60 V/μs |
| Settling Time | 600 ns | - | - |
| Output Voltage High (VOH) | +11.75 V | - | - |
| Output Voltage Low (VOL) | -11.84 V | - | - |
| Supply Current per Amplifier (ISY) | 3.5 mA | 3.0 mA | 4.0 mA |
Key Features
- Very low noise: 6 nV/√Hz
- Low offset voltage: 100 μV max
- Low input bias current: 10 pA max
- Fast settling time: 600 ns to 0.01%
- High slew rate: 50 V/μs
- High output drive capability
- Unconditionally stable with capacitive loads over 1 nF
- Wide bandwidth and high gain-bandwidth product
Applications
- Electronic instruments
- ATE (Automated Test Equipment) amplification, buffering, and integrator circuits
- CAT/MRI/ultrasound medical instrumentation
- Instrumentation quality photodiode amplification
- Fast precision filters (including PLL filters)
- High-quality audio applications
- Driving high-performance ADC inputs and buffering DAC converter outputs
Q & A
- What is the typical offset voltage of the AD8620?
The typical offset voltage of the AD8620 is 80 μV. - What is the input bias current of the AD8620?
The input bias current of the AD8620 is typically 10 pA. - How fast does the AD8620 settle to 0.01% accuracy?
The AD8620 settles to 0.01% accuracy in less than 600 ns. - What is the slew rate of the AD8620?
The slew rate of the AD8620 is 50 V/μs. - Is the AD8620 stable with capacitive loads?
Yes, the AD8620 is unconditionally stable with capacitive loads over 1 nF. - What are the typical supply current requirements for the AD8620?
The typical supply current per amplifier for the AD8620 is 3.5 mA. - What are some common applications of the AD8620?
The AD8620 is commonly used in electronic instruments, ATE, medical instrumentation, photodiode amplification, precision filters, and high-quality audio applications. - What is the noise level of the AD8620?
The AD8620 has a very low noise level of 6 nV/√Hz. - Is the AD8620 suitable for high-performance ADC and DAC applications?
Yes, the AD8620 is ideal for driving high-performance ADC inputs and buffering DAC converter outputs. - What is the operating temperature range of the AD8620?
The AD8620 is fully specified over the temperature range of -40°C to +125°C.
