Overview
The AD8625ARU, 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 stability, making it suitable for a wide range of applications. The AD8625ARU is available in a 14-pin TSSOP package, enhancing its usability in compact and high-density designs.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VS = 5 V, VCM = 1.5 V, TA = 25°C | 0.05 mV | 0.5 mV | 1.2 mV | mV |
| Input Bias Current | IB | –40°C < TA < +85°C | 0.25 pA | 1 pA | 60 pA | pA |
| Input Offset Current | IOS | –40°C < TA < +85°C | 0.5 pA | 25 pA | pA | |
| Input Voltage Range | 0 V | 3 V | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2.5 V | 66 dB | 87 dB | dB | |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.5 V to 4.5 V | 100 V/mV | 230 V/mV | V/mV | |
| Output Voltage High | VOH | IL = 2 mA, –40°C < TA < +85°C | 4.92 V | 4.90 V | V | |
| Output Voltage Low | VOL | IL = 2 mA, –40°C < TA < +85°C | 0.075 V | 0.08 V | V | |
| Supply Current/Amplifier | ISY | –40°C < TA < +85°C | 630 µA | 785 µA | 800 µA | µA |
| Slew Rate | SR | 5 V/µs | V/µs | |||
| Gain Bandwidth Product | GBP | 5 MHz | MHz | |||
| Phase Margin | ØM | 60 Degrees | Degrees | |||
| Voltage Noise (Peak-to-Peak) | en p-p | 0.1 Hz to 10 Hz | 1.9 µV p-p | µV p-p | ||
| Voltage Noise Density | en f = 1 kHz | 17.5 nV/√Hz | nV/√Hz | |||
| Current Noise Density | in f = 1 kHz | 0.4 fA/√Hz | fA/√Hz |
Key Features
- Precision JFET Input: Offers low input bias current and high input impedance.
- Rail-to-Rail Input and Output: Enables the amplifier to swing nearly rail-to-rail at both the input and output, making it versatile for various applications.
- Low Power Consumption: Supply current is less than 630 µA per amplifier, suitable for battery-powered and low-power designs.
- High Stability with Capacitive Loads: The outputs remain stable with capacitive loads of over 500 pF.
- High Gain Bandwidth Product: 5 MHz, ensuring good dynamic performance.
- Low Noise: Voltage noise density of 17.5 nV/√Hz at 1 kHz.
- High Common-Mode Rejection Ratio (CMRR): Up to 87 dB, providing good rejection of common-mode signals.
Applications
- Photodiode Transimpedance Amplification: Ideal for converting current signals from photodiodes into voltage signals.
- ATE Reference Level Drivers: Suitable for driving reference levels in automated test equipment.
- Battery Management: Used in both line-powered and portable instrumentation for battery management systems.
- Remote Sensor Signal Conditioning: Including automotive sensors, due to its stability and low noise characteristics.
- Buffering CMOS DACs and ASICs: The rail-to-rail input and output capabilities make it suitable for buffering digital-to-analog converters and application-specific integrated circuits.
Q & A
- What is the input bias current of the AD8625ARU?
The input bias current is typically 1 pA, with a maximum of 60 pA over the temperature range –40°C to +85°C.
- What is the output voltage range of the AD8625ARU?
The output voltage can swing nearly rail-to-rail, with an output voltage high of 4.92 V and an output voltage low of 0.075 V at a load current of 2 mA.
- What is the supply current per amplifier for the AD8625ARU?
The supply current per amplifier is less than 630 µA, with a typical value of 785 µA over the temperature range –40°C to +85°C.
- What is the gain bandwidth product of the AD8625ARU?
The gain bandwidth product is 5 MHz.
- What is the common-mode rejection ratio (CMRR) of the AD8625ARU?
The CMRR is up to 87 dB.
- What are the typical applications of the AD8625ARU?
Typical applications include photodiode transimpedance amplification, ATE reference level drivers, battery management, remote sensor signal conditioning, and buffering CMOS DACs and ASICs.
- What is the slew rate of the AD8625ARU?
The slew rate is 5 V/µs.
- What is the phase margin of the AD8625ARU?
The phase margin is 60 degrees.
- What is the voltage noise density of the AD8625ARU?
The voltage noise density is 17.5 nV/√Hz at 1 kHz.
- In what package is the AD8625ARU available?
The AD8625ARU is available in a 14-pin TSSOP package.
