Overview
The ADA4622-2ARZ-RL, produced by Analog Devices Inc., is a next-generation, dual, low bias current, single-supply, rail-to-rail output (RRO) precision operational amplifier. It is designed as an upgrade to the AD822, offering improved performance without compromising flexibility and ease of use. This op-amp features enhanced speed, reduced noise, and improved DC precision, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VSY | ±4 V to ±18 V | V | |||
| Supply Current per Amplifier | ISY | −40°C < TA < +125°C | 600 | 650 | 675 | µA |
| Slew Rate | SR | VOUT = ±3 V, RL = 2 kΩ, CL = 100 pF, AV = 1 | 21 | V/µs | ||
| Gain Bandwidth Product | GBP | AV = 100, CL = 35 pF | 7.8 | MHz | ||
| Unity-Gain Crossover | UGC | AV = 1 | 6.5 | MHz | ||
| −3 dB Bandwidth | AV = 1 | 10 | MHz | |||
| Phase Margin | ФM | AV = 1 | 50 | Degrees | ||
| Input Bias Current | IB | −40°C < TA < +125°C | ±10 pA | ±1.5 nA | pA/nA | |
| Input Offset Current | IOS | −40°C < TA < +125°C | ±10 pA | ±0.5 nA | pA/nA | |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2 V, −40°C < TA < +125°C | 70 | 87 dB | dB | |
| Output Voltage High | VOH | ISOURCE = 1 mA, −40°C < TA < +125°C | 50 | 100 mV | mV | |
| Output Voltage Low | VOL | ISINK = 1 mA, −40°C < TA < +125°C | 45 | 120 mV | mV | |
| Short-Circuit Current | ISC | Sourcing/Sinking | 31 mA / −40 mA | mA |
Key Features
- Low Bias Current: The ADA4622-2ARZ-RL features low input bias current, making it suitable for applications requiring minimal input current.
- Single-Supply, Rail-to-Rail Output: The op-amp operates from a single supply and provides rail-to-rail output, enhancing its versatility in various applications.
- Improved Speed and Slew Rate: Enhanced bandwidth and slew rate improve settling time performance and enable the device to drive the inputs of modern SAR ADCs.
- Reduced Noise: Broadband noise is reduced by 25%, and 1/f noise is reduced by half, while maintaining the same supply current as its predecessors.
- Enhanced DC Precision: The ADA4622-2ARZ-RL has half the offset voltage and includes a maximum thermal drift specification, improving overall DC precision.
- Improved Common-Mode Rejection Ratio (CMRR): The CMRR is improved, making the device more suitable for noninverting gain and difference amplifier configurations.
- Input EMI Filters: Built-in EMI filters increase signal robustness against closely located switching noise sources.
- Extended Temperature Range: The op-amp is specified for operation over an extended industrial temperature range of −40°C to +125°C.
Applications
- Transimpedance Amplifiers (TIAs): The low input bias current and low input capacitance make the ADA4622-2ARZ-RL a good choice for TIA configurations, such as in photodiode applications.
- Analog-to-Digital Converters (ADCs): The op-amp's ability to drive the inputs of modern SAR ADCs makes it suitable for ADC driver applications.
- Medical and Industrial Equipment: Its precision and robustness against noise make it ideal for use in medical devices and industrial control systems.
- Audio and Signal Processing: The ADA4622-2ARZ-RL can be used in audio circuits and other signal processing applications where low noise and high precision are required.
Q & A
- What is the supply voltage range for the ADA4622-2ARZ-RL?
The ADA4622-2ARZ-RL operates from a supply voltage range of 5 V to 30 V, with specifications at +5 V, ±5 V, and ±15 V.
- What are the key improvements over the AD822?
The ADA4622-2ARZ-RL offers improved speed, reduced noise, enhanced DC precision, and a better common-mode rejection ratio compared to the AD822.
- What is the slew rate of the ADA4622-2ARZ-RL?
The slew rate is 21 V/µs for low to high transition and −16 V/µs for high to low transition.
- What is the gain bandwidth product of the ADA4622-2ARZ-RL?
The gain bandwidth product is 7.8 MHz at a gain of 100 and a load capacitance of 35 pF.
- What is the input bias current of the ADA4622-2ARZ-RL?
The input bias current is ±10 pA, with a maximum of ±1.5 nA over the temperature range of −40°C to +125°C.
- What is the common-mode rejection ratio (CMRR) of the ADA4622-2ARZ-RL?
The CMRR is 70 dB to 87 dB over the temperature range of −40°C to +125°C).
- What are the typical applications of the ADA4622-2ARZ-RL?
Typical applications include transimpedance amplifiers, ADC drivers, medical and industrial equipment, and audio and signal processing circuits).
- What packages are available for the ADA4622-2ARZ-RL?
The ADA4622-2ARZ-RL is available in 8-lead SOIC and 8-lead MSOP packages).
- What is the operating temperature range of the ADA4622-2ARZ-RL?
The operating temperature range is −40°C to +125°C).
- Does the ADA4622-2ARZ-RL have built-in EMI filters?
Yes, the ADA4622-2ARZ-RL includes built-in EMI filters to increase signal robustness against switching noise sources).
- What is the phase margin of the ADA4622-2ARZ-RL?
The phase margin is 50 degrees at a gain of 1).
