Overview
The AD8021ARMZ-REEL, 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 notable for its low noise and high speed characteristics. This amplifier is fabricated using Analog Devices' proprietary High Voltage eXtra-Fast Complementary Bipolar (XFCB) process, which enables low voltage and low current noise while maintaining a low quiescent supply current. The AD8021 is ideal for a wide variety of gain configurations and can be used throughout a signal processing chain and in control loops.
Key Specifications
| Parameter | Typical Value | Units |
|---|---|---|
| Input Voltage Noise | 2.1 | nV/√Hz |
| Input Current Noise | 2.1 | pA/√Hz |
| Quiescent Current | 7 | mA @ ±5 V |
| Quiescent Current (Output Disable) | 1.3 | mA |
| Supply Voltage Range | ±2.25 V to ±12 V, 5 V to 24 V | V |
| Bandwidth (G = +5, CC = 2pF, VO = 0.05V p-p) | 200 | MHz |
| Slew Rate | 460 | V/μs |
| Input Offset Voltage | 0.4 | mV |
| Input Offset Voltage Drift | 0.5 | μV/°C |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 8-lead MSOP | |
| Common Mode Rejection Ratio (CMRR) | 98 | dB |
| Power Supply Rejection Ratio (PSRR) | 95 | dB |
Key Features
- Low noise and high speed operation, making it suitable for 16-bit resolution systems.
- Low voltage and low current noise (2.1 nV/√Hz and 2.1 pA/√Hz, respectively).
- Low quiescent supply current (7 mA @ ±5 V) with an output disable feature reducing it to 1.3 mA.
- Wide operating supply voltage range from ±2.25 V to ±12 V and single 5 V to 24 V supplies.
- High slew rate of 460 V/μs and a bandwidth of 200 MHz (G = +5, CC = 2pF, VO = 0.05V p-p).
- Adjustable compensation for gain bandwidth product, allowing for trade-offs between bandwidth and stability.
- Fast overload recovery of 50 ns and settling time to 0.01% in 23 ns for a 1 V step.
- Capable of driving a 75 Ω line with ±3 V video signals.
- Available in 8-lead SOIC and MSOP packages.
Applications
- ADC preamps and drivers, particularly for high-resolution ADCs.
- Instrumentation preamps and active filters.
- Portable instrumentation and line receivers.
- Precision instruments and ultrasound signal processing.
- High gain circuits and control loops.
- Differential drivers for balanced lines and other applications requiring differential drive.
Q & A
- What is the typical input voltage noise of the AD8021?
The typical input voltage noise is 2.1 nV/√Hz.
- What is the quiescent current of the AD8021 when the output is disabled?
The quiescent current is reduced to 1.3 mA when the output is disabled.
- What is the operating temperature range of the AD8021?
The operating temperature range is -40°C to +85°C.
- What is the typical slew rate of the AD8021?
The typical slew rate is 460 V/μs.
- Can the AD8021 drive a 75 Ω line?
Yes, the AD8021 can drive a 75 Ω line with ±3 V video signals.
- What are the common package types for the AD8021?
The AD8021 is available in 8-lead SOIC and MSOP packages.
- What is the typical bandwidth of the AD8021 at a gain of +5?
The typical bandwidth is 200 MHz at a gain of +5, with CC = 2pF and VO = 0.05V p-p.
- How does the AD8021 perform in terms of harmonic distortion?
The AD8021 has a harmonic distortion better than 90 dBc at frequencies between 100 kHz and 1 MHz.
- What is the input offset voltage drift of the AD8021?
The input offset voltage drift is 0.5 μV/°C.
- Can the AD8021 be used as a differential driver?
Yes, the AD8021 is uniquely suited as a low noise differential driver for many applications.
