Overview
The ADA4622-2ARZ is a precision operational amplifier (op-amp) manufactured by Analog Devices Inc. It is part of the next generation of single-supply, rail-to-rail output (RRO) precision junction field effect transistors (JFET) input op-amps, offering significant improvements over its predecessors such as the AD820, AD822, and AD824. This dual op-amp is designed for high precision and low noise, making it suitable for a wide range of applications that require high DC accuracy and robust signal handling.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | A Grade, −40°C < TA < +125°C | ±0.04 | ±0.8 | ±2 | mV |
| Offset Voltage Drift | ΔVOS/ΔT | A Grade, −40°C < TA < +125°C | ±2 | ±5 | ±15 | µV/°C |
| Input Bias Current | IB | −40°C < TA < +125°C | ±0.5 | ±10 | ±1.5 nA | pA |
| Input Capacitance (Differential Mode) | CINDM | 0.4 | pF | |||
| Input Resistance (Differential Mode) | RDIFF | 1013 | Ω | |||
| Output Voltage High | VOH | ISOURCE = 1 mA, −40°C < TA < +125°C | 50 | 30 | 100 | mV |
| Output Current | IOUT | VDROPOUT < 1 V | 20 | mA | ||
| Bandwidth | BW | 7.5 MHz | ||||
| Supply Voltage Range | VSY | 5 V | 30 V | |||
| Operating Temperature Range | TA | −40°C | +125°C | |||
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
Key Features
- Low Bias Current: The ADA4622-2ARZ features very low input bias current, typically 10 pA, making it ideal for applications where minimal input current is crucial.
- Rail-to-Rail Output: The op-amp can drive its output voltage to within a few millivolts of the supply rails, enhancing its usability in single-supply systems.
- High DC Precision: With improved offset voltage and thermal drift specifications, this op-amp offers high DC accuracy, suitable for precision applications.
- Enhanced Signal Robustness: Input EMI filters increase the signal robustness in the presence of switching noise sources.
- High Bandwidth and Slew Rate: The device has a bandwidth of 7.5 MHz and a high slew rate, enabling fast settling times and the ability to drive the inputs of modern SAR ADCs.
- Low Noise: The ADA4622-2ARZ has reduced broadband noise by 25% and 1/f noise by half compared to its predecessors.
- Improved Common-Mode Rejection Ratio (CMRR): Enhanced CMRR makes the device more suitable for noninverting gain and difference amplifier configurations.
Applications
- Medical Equipment: Suitable for medical devices requiring high precision and low noise, such as ECG and EEG systems.
- Industrial Automation: Used in control systems, sensors, and data acquisition systems where high accuracy and robust signal handling are necessary.
- Aerospace and Defense: Ideal for applications requiring high reliability and precision over a wide temperature range.
- Test and Measurement Equipment: Utilized in various test and measurement instruments due to its high DC precision and low noise characteristics.
- Audio and Video Equipment: Suitable for audio and video applications requiring high signal fidelity and low distortion.
Q & A
- What is the typical input bias current of the ADA4622-2ARZ?
The typical input bias current is 10 pA.
- What is the bandwidth of the ADA4622-2ARZ?
The bandwidth is 7.5 MHz.
- What is the operating temperature range of the ADA4622-2ARZ?
The operating temperature range is from −40°C to +125°C.
- What is the package type of the ADA4622-2ARZ?
The package type is 8-SOIC (0.154", 3.90mm Width).
- Does the ADA4622-2ARZ have rail-to-rail output capability?
Yes, the ADA4622-2ARZ has rail-to-rail output capability.
- What are the key improvements over its predecessors like the AD820 and AD822?
The key improvements include reduced offset voltage, lower thermal drift, enhanced signal robustness, higher bandwidth, and lower noise.
- Is the ADA4622-2ARZ suitable for medical equipment applications?
Yes, it is suitable for medical equipment applications due to its high precision and low noise characteristics.
- What is the typical supply current per amplifier for the ADA4622-2ARZ?
The typical supply current per amplifier is 650 µA.
- Does the ADA4622-2ARZ have built-in EMI filters?
Yes, it has built-in input EMI filters to enhance signal robustness.
- Can the ADA4622-2ARZ drive the inputs of modern SAR ADCs?
Yes, it can drive the inputs of modern SAR ADCs due to its high bandwidth and slew rate.
