Overview
The AD8626ARM-R2, produced by Analog Devices Inc., is a precision JFET input operational amplifier. It is part of the AD862x series, known for its true single-supply operation, low power consumption, and rail-to-rail output. This amplifier is designed to offer high precision and low noise, making it suitable for a variety of applications requiring high accuracy and stability.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VS = 5 V, VCM = 1.5 V, TA = 25°C | 0.05 | 0.5 | 1.2 | mV |
| Input Bias Current | IB | –40°C < TA < +85°C | 0.25 | 1 | 60 | pA |
| Input Offset Current | IOS | –40°C < TA < +85°C | 0.5 | 25 | pA | |
| Input Voltage Range | 0 | 3 | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2.5 V | 66 | 87 | dB | |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.5 V to 4.5 V | 100 | 230 | V/mV | |
| Output Voltage High | VOH | IOUT = 1 mA | 4.92 | V | ||
| Supply Current | < 630 | μA/amp |
Key Features
- Precision JFET Input: The AD8626 features n-channel JFETs, providing low input bias current and high input impedance.
- Rail-to-Rail Operation: Both input and output stages can swing nearly rail-to-rail, enhancing dynamic range in various applications.
- Low Power Consumption: The amplifier consumes less than 630 μA per amplifier, making it suitable for battery-powered and portable devices.
- Low Noise: The AD8626 has a wideband input voltage noise of 16 nV/√Hz, ensuring high signal integrity.
- Stable with Capacitive Loads: The outputs remain stable with capacitive loads of over 500 pF.
Applications
- Photodiode Transimpedance Amplification: Ideal for converting current signals from photodiodes into voltage signals.
- ATE Reference Level Drivers: Used in automated test equipment for driving reference levels.
- Battery Management: Suitable for both line-powered and portable instrumentation in battery management systems.
- Remote Sensor Signal Conditioning: Including automotive sensors, due to its ability to handle signals below ground and its rail-to-rail output.
- Buffering CMOS DACs and ASICs: The rail-to-rail input and output capabilities make it an excellent buffer for digital-to-analog converters and application-specific integrated circuits.
Q & A
- What is the typical offset voltage of the AD8626?
The typical offset voltage of the AD8626 is 0.5 mV at VS = 5 V and VCM = 1.5 V, TA = 25°C.
- What is the input bias current of the AD8626?
The input bias current is typically 1 pA, with a maximum of 60 pA over the temperature range –40°C to +85°C.
- Can the AD8626 operate on a single supply?
- What is the maximum capacitive load the AD8626 can handle?
The AD8626 can handle capacitive loads of over 500 pF without instability.
- What are some common applications of the AD8626?
Common applications include photodiode transimpedance amplification, ATE reference level drivers, battery management, and remote sensor signal conditioning.
- What is the typical supply current of the AD8626?
The typical supply current is less than 630 μA per amplifier.
- Does the AD8626 have rail-to-rail input and output capabilities?
- What is the noise performance of the AD8626?
The AD8626 has a wideband input voltage noise of 16 nV/√Hz, ensuring high signal integrity.
- Can the AD8626 be used in automotive applications?
- What is the common-mode rejection ratio (CMRR) of the AD8626?
The CMRR is typically 87 dB, with a minimum of 66 dB over the specified conditions.
