Overview
The ADA4622-1ARZ-RL, produced by Analog Devices Inc., is a next-generation operational amplifier (op-amp) that builds upon the legacy of the AD820, AD822, and AD824 series. This single-supply, rail-to-rail output (RRO) op-amp features precision junction field effect transistors (JFET) inputs, making it an excellent choice for a wide range of applications. It offers improved performance in terms of speed, noise, and DC precision, while maintaining the flexibility and ease of use of its predecessors.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Voltage Range | −0.2 V to V+ - 1.5 V | |
| Input Bias Current | ±10 pA (−40°C to +125°C) | |
| Input Offset Current | ±0.5 nA (−40°C to +125°C) | |
| Common-Mode Rejection Ratio (CMRR) | 87 dB (A Grade), 73 dB (B Grade) | VCM = 0 V to 2 V |
| Open-Loop Voltage Gain | 110 dB (A Grade), 99 dB (B Grade) | RL = 10 kΩ, VOUT = 0.2 V to 4.6 V |
| Power Supply Rejection Ratio (PSRR) | 95 dB (A Grade), 74 dB (B Grade) | VSY = 4 V to 15 V |
| Supply Current per Amplifier | 650 µA to 725 µA | −40°C to +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 |
| Gain Bandwidth Product (GBP) | 7.2 MHz | AV = 100, CL = 35 pF |
| Unity-Gain Crossover Frequency | 6 MHz | AV = 1 |
| −3 dB Bandwidth | 9 MHz | AV = 1 |
| Phase Margin | 50 Degrees | |
| Settling Time | VIN = 4 V step, RL = 2 kΩ |
Key Features
- Next Generation Op-Amp: Builds upon the AD820, AD822, and AD824 series with improved performance.
- Precision JFET Inputs: Low input bias current and high input impedance.
- Rail-to-Rail Output: Output swings from the negative supply to within 50 mV of the positive supply.
- High Speed and Slew Rate: 20 V/µs slew rate and a gain bandwidth product of 7.2 MHz.
- Low Noise: Reduced voltage noise with 25% lower broadband noise and half the 1/f noise compared to predecessors.
- Improved DC Precision: Half the offset voltage and added thermal drift specifications.
- Enhanced Robustness: Input EMI filters to mitigate the effects of switching noise.
- Wide Operating Range: Operates from 5 V to 30 V and is specified for −40°C to +125°C.
Applications
- Analog-to-Digital Converters (ADCs): Drives the inputs of modern single-ended, successive approximation register (SAR) ADCs.
- Noninverting Gain and Difference Amplifiers: Suitable due to improved common-mode rejection ratio (CMRR).
- Industrial and Automotive Systems: Operates over an extended industrial temperature range.
- Medical and Scientific Instruments: High precision and low noise make it ideal for sensitive measurements.
Q & A
- What is the input voltage range of the ADA4622-1ARZ-RL?
The input voltage range includes the negative supply and extends to within 1.5 V of the positive supply.
- What is the slew rate of the ADA4622-1ARZ-RL?
The slew rate is 20 V/µs for low to high transitions and −15 V/µs for high to low transitions.
- How does the ADA4622-1ARZ-RL improve upon its predecessors?
It offers reduced noise, improved DC precision, and enhanced robustness against EMI.
- What are the typical operating supply voltages for the ADA4622-1ARZ-RL?
The device operates from 5 V to 30 V, with specifications provided at +5 V, ±5 V, and ±15 V.
- What is the common-mode rejection ratio (CMRR) of the ADA4622-1ARZ-RL?
The CMRR is 87 dB for A Grade and 73 dB for B Grade, measured from VCM = 0 V to 2 V.
- What is the gain bandwidth product (GBP) of the ADA4622-1ARZ-RL?
The GBP is 7.2 MHz at a gain of 100 and a load capacitance of 35 pF.
- What are the package options available for the ADA4622-1ARZ-RL?
The ADA4622-1 is available in 5-lead SOT-23 and 8-lead LFCSP packages.
- What is the phase margin of the ADA4622-1ARZ-RL?
The phase margin is 50 degrees.
- How does the ADA4622-1ARZ-RL handle EMI?
The device includes input EMI filters to increase signal robustness against switching noise.
- What are the typical applications for the ADA4622-1ARZ-RL?
It is suitable for driving ADC inputs, noninverting gain and difference amplifiers, industrial and automotive systems, and medical/scientific instruments.
