Overview
The AD8021AR-REEL is a high-performance, low-noise, high-speed operational amplifier designed by Analog Devices Inc. This amplifier is optimized for use in 16-bit resolution systems and is known for its low voltage and current noise, making it ideal for high-speed, low-power instruments. The AD8021AR-REEL operates over a wide range of supply voltages from ±2.25 V to ±12 V, as well as from single 5 V supplies, and is available in both 8-lead SOIC and MSOP packages. It features an output disable pin that allows for further reduction in quiescent supply current, enhancing its power efficiency.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.25 V | - | ±12 V | V |
| Operating Temperature | -40°C | - | 85°C | °C |
| Quiescent Current | 7.0 mA | 7.7 mA | - | mA |
| Output Current | - | - | 60 mA | mA |
| Slew Rate | 95 V/μs | 120 V/μs | - | V/μs |
| Input Offset Voltage | - | 1 mV | - | mV |
| Input Bias Current | - | 7.5 μA | - | μA |
| Common Mode Rejection Ratio | - | 98 dB | - | dB |
| Power Supply Rejection Ratio | - | 95 dB | - | dB |
| Settling Time | - | 23 ns | - | ns |
| Bandwidth | - | 560 MHz | - | MHz |
| Gain Bandwidth Product | - | 1 GHz | - | GHz |
Key Features
- Low Noise: The AD8021AR-REEL features low voltage and current noise (2.1 nV/√Hz and 2.1 pA/√Hz typical) making it suitable for high-resolution applications.
- High Speed: It has a high slew rate of up to 120 V/μs and a bandwidth of 560 MHz, ensuring fast and accurate signal processing.
- Wide Supply Range: Operates over a wide range of supply voltages from ±2.25 V to ±12 V, as well as from single 5 V supplies.
- Output Disable: An output disable pin allows for reducing the quiescent supply current to 1.3 mA, enhancing power efficiency.
- Adjustable Compensation: Allows the user to choose the gain bandwidth product with little trade-off in bandwidth using a single capacitor.
- DC Precision: Features a low input offset voltage of 1 mV and a low input offset voltage drift of 0.5 μV/°C.
- Small Packaging: Available in both standard 8-lead SOIC and MSOP packages.
Applications
- ADC Preamp and Driver: Ideal for driving high-resolution ADCs due to its low noise and high speed.
- Instrumentation Preamp: Suitable for precision instrumentation applications requiring high accuracy and low noise.
- Active Filters: Can be used in active filter circuits where high speed and low noise are critical.
- Portable Instrumentation: Its low power consumption and small packaging make it suitable for portable instrumentation.
- Line Receivers: Can be used as a line receiver in various communication systems.
- Precision Instruments: Ideal for use in precision instruments such as ultrasound signal processing and high gain circuits.
Q & A
- What is the typical input voltage noise of the AD8021AR-REEL?
The typical input voltage noise is 2.1 nV/√Hz.
- What is the slew rate of the AD8021AR-REEL?
The slew rate is up to 120 V/μs.
- What is the operating temperature range of the AD8021AR-REEL?
The operating temperature range is from -40°C to 85°C.
- What are the available package types for the AD8021AR-REEL?
The AD8021AR-REEL is available in both 8-lead SOIC and MSOP packages.
- How does the output disable feature work?
The output disable pin allows the quiescent supply current to be reduced to 1.3 mA, enhancing power efficiency.
- What is the typical quiescent current of the AD8021AR-REEL?
The typical quiescent current is 7.7 mA.
- What is the common mode rejection ratio (CMRR) of the AD8021AR-REEL?
The CMRR is typically 98 dB).
- What is the power supply rejection ratio (PSRR) of the AD8021AR-REEL?
The PSRR is typically 95 dB).
- How fast does the AD8021AR-REEL settle to 0.01% for a 1 V step?
The settling time to 0.01% for a 1 V step is 23 ns).
- What are some common applications of the AD8021AR-REEL?
Common applications include ADC preamp and driver, instrumentation preamp, active filters, portable instrumentation, line receivers, and precision instruments).
