Overview
The ADA4622-2BRZ from Analog Devices Inc. is a precision operational amplifier that represents the next generation of single-supply, rail-to-rail output (RRO) op amps, building upon the legacy of the AD820, AD822, and AD824. This device is designed to offer enhanced performance and robustness, making it an ideal upgrade for various applications. It features a JFET input stage, which provides low input bias current and high input impedance. The ADA4622-2BRZ operates over an extended industrial temperature range of −40°C to +125°C and can be powered from a single supply of 5 V to 30 V.
Key Specifications
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Gain Bandwidth Product | GBP | AV = 100, CL = 35 pF | 8 | MHz | ||
| Slew Rate | SR | VOUT = ±3 V, RL = 2 kΩ, CL = 100 pF, AV = 1 | 21 | 23 | V/µs (Low to High) | |
| VOUT = ±3 V, RL = 2 kΩ, CL = 100 pF, AV = 1 | -16 | -18 | V/µs (High to Low) | |||
| Input Bias Current | IB | TA = 25°C | ±10 pA | ±1.5 nA | ||
| Input Offset Voltage | VOS | A Grade, TA = 25°C | ±0.8 mV | ±2 mV | ||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2 V, A Grade | 70 | 87 | dB | |
| Supply Current per Amplifier | ISY | −40°C < TA < +125°C | 610 | 675 | 700 | µA |
| Output Voltage High | VOH | ISOURCE = 1 mA | 50 | 30 | 100 | mV |
| Output Voltage Low | VOL | ISINK = 1 mA | 45 | 65 | 120 | mV |
Key Features
- High Gain Bandwidth Product: 8 MHz typical, ensuring high-speed performance.
- Low Input Bias Current: ±10 pA maximum at TA = 25°C, reducing errors in high-impedance circuits.
- Low Offset Voltage: ±0.8 mV maximum for A grade, enhancing DC precision.
- Improved Common-Mode Rejection Ratio (CMRR): Up to 87 dB, making it suitable for noninverting gain and difference amplifier configurations.
- Wide Operating Temperature Range: −40°C to +125°C, suitable for industrial and harsh environments.
- Single-Supply Operation: From 5 V to 30 V, with specifications at +5 V, ±5 V, and ±15 V.
- Rail-to-Rail Output: Output voltage swings from the negative supply to the positive supply.
- Input EMI Filters: Added to increase signal robustness against switching noise sources.
- High Slew Rate: 23 V/µs typical (low to high) and −18 V/µs typical (high to low), improving settling time performance.
Applications
- Industrial Automation: Suitable for control systems, sensors, and actuators due to its robust performance over a wide temperature range.
- Medical Devices: Ideal for medical instrumentation requiring high precision and low noise.
- Aerospace and Defense: Used in various military and aerospace applications where reliability and precision are critical.
- Test and Measurement Equipment: Utilized in oscilloscopes, multimeters, and other precision measurement instruments.
- Analog-to-Digital Converters (ADCs): Drives the inputs of modern single-ended successive approximation register (SAR) ADCs efficiently.
Q & A
- What is the gain bandwidth product of the ADA4622-2BRZ?
The gain bandwidth product of the ADA4622-2BRZ is typically 8 MHz.
- What is the input bias current of the ADA4622-2BRZ?
The input bias current is ±10 pA maximum at TA = 25°C.
- What is the operating temperature range of the ADA4622-2BRZ?
The ADA4622-2BRZ operates over an extended industrial temperature range of −40°C to +125°C.
- What are the supply voltage ranges for the ADA4622-2BRZ?
The device can operate from a single supply of 5 V to 30 V, with specifications at +5 V, ±5 V, and ±15 V.
- What is the slew rate of the ADA4622-2BRZ?
The slew rate is typically 23 V/µs (low to high) and −18 V/µs (high to low).
- Does the ADA4622-2BRZ have rail-to-rail output?
Yes, the ADA4622-2BRZ has a rail-to-rail output, meaning the output voltage swings from the negative supply to the positive supply.
- What is the common-mode rejection ratio (CMRR) of the ADA4622-2BRZ?
The CMRR is up to 87 dB, making it suitable for noninverting gain and difference amplifier configurations.
- What are some typical applications of the ADA4622-2BRZ?
Typical applications include industrial automation, medical devices, aerospace and defense, test and measurement equipment, and driving SAR ADCs).
- What packages are available for the ADA4622-2BRZ?
The ADA4622-2 is available in an 8-lead SOIC_N package, an 8-lead MSOP package, and an 8-lead LFCSP package).
- Does the ADA4622-2BRZ have input EMI filters?
Yes, the ADA4622-2BRZ includes input EMI filters to increase signal robustness against switching noise sources).
