Overview
The AD8626ARMZ-R2, produced by Analog Devices Inc., is a precision JFET input operational amplifier. It is part of the AD862x family, which features true single-supply operation, low power consumption, and rail-to-rail output. This amplifier is designed for applications requiring high precision, low noise, and low power consumption. The AD8626 is particularly useful in scenarios where input signals may be below the negative rail, thanks to its input voltage range that extends below the negative rail.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | –40°C < TA < +85°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 | |
| Output Voltage High | VOH | IL = 2 mA, –40°C < TA < +85°C | 4.92 | 4.90 | V | |
| Output Voltage Low | VOL | IL = 2 mA, –40°C < TA < +85°C | 0.075 | 0.08 | V | |
| Output Current | IOUT | ±10 | mA | |||
| Supply Current/Amplifier | ISY | –40°C < TA < +85°C | 630 | 785 | 800 | µA |
| Slew Rate | SR | 5 | V/µs | |||
| Gain Bandwidth Product | GBP | 5 | MHz | |||
| Phase Margin | ØM | 60 | Degrees | |||
| Voltage Noise Density | en | f = 1 kHz | 17.5 | nV/√Hz | ||
| Current Noise Density | in | f = 1 kHz | 0.4 | fA/√Hz |
Key Features
- Rail-to-Rail Input and Output: The AD8626 can swing nearly rail-to-rail at the input and rail-to-rail at the output, making it suitable for a wide range of applications.
- True Single-Supply Operation: The amplifier operates on a single supply voltage from 5 V to 26 V.
- Low Power Consumption: The supply current is less than 630 µA per amplifier.
- High Input Impedance: Uses n-channel JFETs for a low offset, low noise, and high impedance input stage.
- Stable with Capacitive Loads: The outputs remain stable with capacitive loads of over 500 pF.
- Low Noise and Offset Voltage: Features low voltage noise density and offset voltage drift.
Applications
- Photodiode Transimpedance Amplification: Suitable for amplifying signals from photodiodes.
- ATE Reference Level Drivers: Used in automated test equipment for driving reference levels.
- Battery Management: Applicable in both line-powered and portable instrumentation.
- Remote Sensor Signal Conditioning: Including automotive sensors and other remote sensing applications.
- Buffering CMOS DACs and ASICs: Can buffer outputs from CMOS DACs and ASICs effectively.
Q & A
- What is the input voltage range of the AD8626?
The input voltage range extends below the negative rail, allowing it to accommodate input signals below ground.
- What is the typical supply current of the AD8626?
The typical supply current is less than 785 µA per amplifier.
- Can the AD8626 operate with capacitive loads?
- What is the slew rate of the AD8626?
The slew rate is 5 V/µs.
- 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.
- Does the AD8626 support single-supply operation?
- What is the typical offset voltage of the AD8626?
The typical offset voltage is 0.5 mV.
- How does the AD8626 perform in terms of noise?
- Is the AD8626 suitable for automotive applications?
- What is the gain bandwidth product of the AD8626?
