Overview
The AD8625AR-REEL7, produced by Analog Devices Inc., is a precision JFET input operational amplifier. This quad amplifier is designed for low power consumption and features true single-supply operation with rail-to-rail output. It is particularly suited for applications requiring high precision, low noise, and stable performance over a wide range of temperatures.
The AD8625 series is known for its ability to swing nearly rail-to-rail at both the input and output, making it ideal for buffering CMOS DACs, ASICs, and other wide dynamic range signals. The amplifier's low power consumption and stability with capacitive loads make it a versatile choice for various industrial and automotive applications.
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 | |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.5 V to 4.5 V | 100 | 230 | V/mV | |
| Output Voltage High | VOH | RL = 10 kΩ | 4.92 | V | ||
| Output Current | IOUT | ±15 | mA | |||
| Supply Current/Amplifier | ISY | –40°C < TA < +85°C | 710 | 850 | 900 | 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 | 16 | nV/√Hz | ||
| Current Noise Density | in | f = 1 kHz | 0.5 | fA/√Hz |
Key Features
- Precision JFET Input: Low input bias current and offset current, making it suitable for high precision applications.
- Single-Supply Operation: Operates from a single supply voltage, simplifying circuit design.
- Rail-to-Rail Output: Output voltage can swing nearly to the supply rails, maximizing dynamic range.
- Low Power Consumption: Supply current is less than 630 μA per amplifier, ideal for battery-powered and portable devices.
- Stable with Capacitive Loads: Can drive capacitive loads of over 500 pF without oscillation.
- High Common-Mode Rejection Ratio (CMRR): Ensures good rejection of common-mode signals, enhancing signal integrity.
- Low Noise Performance: Low voltage noise density and current noise density, suitable for noise-sensitive applications.
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 stability and low noise characteristics.
- Buffering CMOS DACs and ASICs: Its rail-to-rail input and output capabilities make it a good buffer for wide dynamic range signals.
Q & A
- What is the typical offset voltage of the AD8625AR-REEL7?
The typical offset voltage is 0.5 mV.
- What is the input bias current of the AD8625AR-REEL7?
The input bias current is typically 1 pA.
- Can the AD8625AR-REEL7 operate with a single supply voltage?
Yes, it supports true single-supply operation.
- What is the maximum output current of the AD8625AR-REEL7?
The maximum output current is ±15 mA.
- What is the slew rate of the AD8625AR-REEL7?
The slew rate is 5 V/µs.
- What is the gain bandwidth product of the AD8625AR-REEL7?
The gain bandwidth product is 5 MHz.
- Is the AD8625AR-REEL7 stable with capacitive loads?
Yes, it remains stable with capacitive loads of over 500 pF.
- What are some common applications of the AD8625AR-REEL7?
Applications include photodiode transimpedance amplification, ATE reference level drivers, battery management, and remote sensor signal conditioning.
- What is the typical supply current per amplifier for the AD8625AR-REEL7?
The typical supply current per amplifier is 850 µA.
- Is the AD8625AR-REEL7 suitable for automotive applications?
Yes, it is suitable for automotive sensors and other automotive applications due to its stability and low noise characteristics.
