Overview
The ADA4622-2ARMZ is a precision operational amplifier (op-amp) produced by Analog Devices Inc. It is part of the next generation of single-supply, rail-to-rail output (RRO) precision JFET input op-amps, offering significant improvements over its predecessors like the AD822. This dual-channel op-amp is designed for low-power applications requiring high input common-mode voltage range and robust signal handling in the presence of switching noise.
The ADA4622-2ARMZ operates over a wide voltage range of 5V to 30V and is specified for the extended industrial temperature range of -40°C to +125°C. It features enhanced speed, reduced voltage noise, and improved DC precision, making it suitable for a variety of applications including high output impedance sensor interfaces, photodiode sensor interfaces, transimpedance amplifiers, ADC drivers, and precision filters.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | JFET Amplifier | |
| Number of Channels | 2 | |
| Gain Bandwidth Product (GBP) | 8 MHz | |
| Slew Rate (SR) | 23 V/µs (Low to High), -18 V/µs (High to Low) | V/µs |
| Common Mode Rejection Ratio (CMRR) | 84 dB | dB |
| Input Bias Current (Ib) | 2 pA | pA |
| Input Offset Voltage (Vos) | 40 µV | µV |
| Supply Current per Amplifier (ISY) | 665 µA (Typical) | µA |
| Output Current per Channel (IOUT) | 20 mA | mA |
| Supply Voltage Range | 5 V to 30 V | V |
| Operating Temperature | -40°C to +125°C | °C |
| Package / Case | MSOP-8 |
Key Features
- Rail-to-Rail Output: The output swings rail-to-rail, ensuring maximum signal range.
- Low Input Bias Current: With an input bias current of 2 pA, it is ideal for high impedance sensor interfaces.
- High Common Mode Rejection Ratio (CMRR): A CMRR of 84 dB enhances the op-amp's ability to reject common-mode noise.
- Input EMI Filters: Built-in EMI filters improve signal robustness against switching noise.
- Enhanced Speed and Output Drive: Increased bandwidth and slew rate, along with strong output drive, improve settling time performance and enable driving modern SAR ADCs.
- Reduced Voltage Noise: Both broadband and 1/f noise are reduced while maintaining constant supply current.
- Improved DC Precision: Half the offset voltage and added thermal drift specification compared to the AD822.
Applications
- High Output Impedance Sensor Interfaces: Suitable for sensors with high output impedance due to its low input bias current.
- Photodiode Sensor Interfaces: Ideal for photodiode applications requiring low noise and high sensitivity.
- Transimpedance Amplifiers: Used in transimpedance amplifier configurations for converting current signals to voltage signals.
- ADC Drivers: Drives the inputs of modern single-ended successive approximation register (SAR) analog-to-digital converters (ADCs).
- Precision Filters and Signal Conditioning: Used in various signal conditioning and filtering applications requiring high precision and low noise.
Q & A
- What is the amplifier type of the ADA4622-2ARMZ?
The ADA4622-2ARMZ is a JFET (Junction Field Effect Transistor) amplifier.
- How many channels does the ADA4622-2ARMZ have?
The ADA4622-2ARMZ is a dual-channel op-amp.
- What is the gain bandwidth product (GBP) of the ADA4622-2ARMZ?
The GBP of the ADA4622-2ARMZ is 8 MHz.
- What is the slew rate of the ADA4622-2ARMZ?
The slew rate of the ADA4622-2ARMZ is 23 V/µs (low to high transition) and -18 V/µs (high to low transition).
- What is the common mode rejection ratio (CMRR) of the ADA4622-2ARMZ?
The CMRR of the ADA4622-2ARMZ is 84 dB.
- What is the input bias current of the ADA4622-2ARMZ?
The input bias current of the ADA4622-2ARMZ is 2 pA.
- What is the supply voltage range of the ADA4622-2ARMZ?
The supply voltage range of the ADA4622-2ARMZ is from 5 V to 30 V.
- What is the operating temperature range of the ADA4622-2ARMZ?
The operating temperature range of the ADA4622-2ARMZ is from -40°C to +125°C.
- What package type is the ADA4622-2ARMZ available in?
The ADA4622-2ARMZ is available in an MSOP-8 package.
- What are some common applications of the ADA4622-2ARMZ?
The ADA4622-2ARMZ is commonly used in high output impedance sensor interfaces, photodiode sensor interfaces, transimpedance amplifiers, ADC drivers, and precision filters.
