Overview
The AD8021ARM, produced by Analog Devices Inc., is a high-performance, high-speed voltage feedback operational amplifier. It is designed for use in 16-bit resolution systems and is fabricated on Analog Devices' proprietary High Voltage eXtra-Fast Complementary Bipolar (XFCB) process. This amplifier is notable for its low noise and low current consumption, making it ideal for high-speed, low-power instruments. The AD8021ARM operates over a wide range of supply voltages from ±2.25 V to ±12 V, as well as from single 5 V supplies, and features an output disable pin to further reduce quiescent supply current. It is available in 8-lead SOIC and MSOP packages and is stable over a temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Amplifier Type | Voltage Feedback |
| Number of Channels | 1 |
| Operating Supply Voltage | ±2.25 V to ±12 V, single 5 V |
| Operating Supply Current | 7.7 mA |
| Quiescent Current | 7.7 mA |
| Slew Rate | 460 V/μs |
| Bandwidth | 560 MHz |
| Gain Bandwidth Product | 1 GHz |
| Input Offset Voltage (Vos) | 400 μV |
| Input Bias Current | 7.5 μA |
| Common Mode Rejection Ratio (CMRR) | 98 dB |
| Output Current per Channel | 70 mA |
| Operating Temperature | -40°C to +85°C |
| Package | 8-lead SOIC, MSOP |
Key Features
- Low noise: 2.1 nV/√Hz typical voltage noise and 2.1 pA/√Hz typical current noise.
- High speed: 560 MHz bandwidth and 460 V/μs slew rate.
- Adjustable compensation: Allows the user to choose the gain bandwidth product that best suits the application.
- Low power consumption: Quiescent supply current of 7.7 mA, with an output disable pin to reduce current to 1.3 mA.
- Wide supply voltage range: Operates from ±2.25 V to ±12 V and single 5 V supplies.
- High gain bandwidth product: 1 GHz, making it suitable for high-resolution ADCs and other high-speed applications.
- Fast overload recovery: 50 ns recovery time for a 1 V step).
- Stable over temperature: Low input offset voltage drift and input bias current drift).
Applications
- High-resolution ADC drivers: Ideal for driving 16-bit high-resolution ADCs with high sampling rates).
- Differential drivers: Suitable for balanced lines and other applications requiring differential drive).
- Active filters: Excellent choice for active filter circuits due to its low noise and high gain bandwidth).
- Television broadcasting equipment: Used in various television broadcasting applications).
- Control loops and signal processing chains: General-purpose amplifier suitable for a wide variety of gain configurations).
Q & A
- What is the typical voltage noise of the AD8021ARM? The typical voltage noise is 2.1 nV/√Hz.
- What is the slew rate of the AD8021ARM? The slew rate is 460 V/μs.
- What is the gain bandwidth product of the AD8021ARM? The gain bandwidth product is 1 GHz.
- What is the operating supply current of the AD8021ARM? The operating supply current is 7.7 mA.
- What is the input offset voltage of the AD8021ARM? The input offset voltage is 400 μV.
- What is the common mode rejection ratio (CMRR) of the AD8021ARM? The CMRR is 98 dB.
- What are the typical applications of the AD8021ARM? It is used in high-resolution ADC drivers, differential drivers, active filters, television broadcasting equipment, and control loops.
- What is the temperature range for the AD8021ARM? The operating temperature range is -40°C to +85°C.
- What packages are available for the AD8021ARM? It is available in 8-lead SOIC and MSOP packages.
- How can the gain bandwidth product be adjusted in the AD8021ARM? The gain bandwidth product can be adjusted using an external compensation capacitor.
