Overview
The ADA4622-4ARZ-RL, produced by Analog Devices Inc., is a precision operational amplifier (op-amp) that represents the next generation of single-supply, rail-to-rail output (RRO), precision junction field effect transistors (JFET) input op-amps. This device is an upgrade to the AD820/AD822/AD824 series, offering improved performance and robustness. It features enhanced speed, reduced noise, and improved DC precision, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Voltage Range | −0.2 V to V+ - 1.5 V | |
| Input Bias Current | ±10 pA (−40°C < TA < +125°C) | |
| Input Offset Current | ±0.5 nA (−40°C < TA < +125°C) | |
| Common-Mode Rejection Ratio (CMRR) | 87 dB (A Grade), 70 dB (B Grade) | VCM = 0 V to 2 V |
| Open-Loop Voltage Gain | 110 dB (A Grade), 99 dB (B Grade) | RL = 10 kΩ to V−, VOUT = 0.2 V to 4.6 V |
| Supply Current per Amplifier | 650 µA to 700 µA (−40°C < TA < +125°C) | |
| Slew Rate | 20 V/µs (Low to high), −15 V/µs (High to low) | VOUT = 0.5 V to 3.5 V, RL = 2 kΩ, CL = 100 pF, AV = 1 |
| Gain Bandwidth Product (GBP) | 7.2 MHz | AV = 100, CL = 35 pF |
| Unity-Gain Crossover | 6 MHz | AV = 1 |
| −3 dB Bandwidth | 9 MHz | AV = 1 |
| Phase Margin | 50 Degrees | |
| Settling Time | 100 µs (VIN = 4 V step, RL = 2 kΩ) | |
| Operating Temperature Range | −40°C to +125°C | |
| Supply Voltage Range | 5 V to 30 V |
Key Features
- Rail-to-Rail Output: The ADA4622-4ARZ-RL features rail-to-rail output, allowing the output voltage to swing from the negative supply to the positive supply.
- Improved DC Precision: Enhanced DC precision with half the offset and added thermal drift specifications compared to the AD820/AD822/AD824 series.
- Reduced Noise: Broadband noise reduced by 25% and 1/f noise reduced by half.
- Input EMI Filters: Built-in input EMI filters to increase signal robustness against switching noise sources.
- High Speed and Strong Output Drive: Increased bandwidth and slew rate, along with strong output drive, enabling the device to drive the inputs of modern single-ended SAR ADCs efficiently.
- Improved Common-Mode Rejection Ratio (CMRR): Enhanced CMRR making the device more suitable for noninverting gain and difference amplifier configurations.
- Extended Industrial Temperature Range: Operates over the extended industrial temperature range of −40°C to +125°C.
Applications
- Analog-to-Digital Converters (ADCs): Suitable for driving the inputs of modern single-ended SAR ADCs.
- Industrial Control Systems: Ideal for use in industrial control systems due to its robust performance and wide operating temperature range.
- Medical Devices: Applicable in medical devices requiring high precision and low noise.
- Aerospace and Defense: Suitable for aerospace and defense applications where high reliability and precision are critical.
- Automotive Systems: Can be used in automotive systems that require robust performance over a wide temperature range.
Q & A
- What is the input voltage range of the ADA4622-4ARZ-RL?
The input voltage range includes the negative supply and extends up to V+ - 1.5 V.
- What are the key improvements over the AD820/AD822/AD824 series?
Key improvements include reduced noise, improved DC precision, enhanced speed, and stronger output drive.
- What is the common-mode rejection ratio (CMRR) of the ADA4622-4ARZ-RL?
The CMRR is 87 dB for A Grade and 70 dB for B Grade at VCM = 0 V to 2 V.
- What is the operating temperature range of the ADA4622-4ARZ-RL?
The device operates over the extended industrial temperature range of −40°C to +125°C.
- What is the supply voltage range for the ADA4622-4ARZ-RL?
The supply voltage range is from 5 V to 30 V.
- What are the typical applications of the ADA4622-4ARZ-RL?
Typical applications include driving SAR ADCs, industrial control systems, medical devices, aerospace and defense, and automotive systems.
- What is the slew rate of the ADA4622-4ARZ-RL?
The slew rate is 20 V/µs for low to high transition and −15 V/µs for high to low transition.
- How does the ADA4622-4ARZ-RL handle EMI?
The device includes built-in input EMI filters to increase signal robustness against switching noise sources.
- What is the gain bandwidth product (GBP) of the ADA4622-4ARZ-RL?
The GBP is 7.2 MHz at AV = 100 and CL = 35 pF.
- What is the phase margin of the ADA4622-4ARZ-RL?
The phase margin is 50 degrees.
