Overview
The AD8626AR, produced by Analog Devices Inc., is a high-precision operational amplifier known for its rail-to-rail input and output swing capabilities. This amplifier is part of the AD862x series, which is renowned for its low noise, high accuracy, and robust performance across a wide range of operating conditions. The AD8626AR is particularly suited for applications requiring high precision and low offset voltage, making it an excellent choice for various industrial, medical, 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 | VS = 5 V | 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 | IL = 2 mA, –40°C < TA < +85°C | 4.90 | 4.92 | 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 (0.1 Hz to 10 Hz) | en p-p | 1.9 | µV p-p | |||
| Voltage Noise Density at 1 kHz | en f = 1 kHz | 17.5 | nV/√Hz | |||
| Current Noise Density at 1 kHz | in f = 1 kHz | 0.4 | fA/√Hz |
Key Features
- Rail-to-Rail Input and Output Swing: The AD8626AR can swing nearly rail-to-rail at both the input and output, making it highly versatile for various applications.
- Low Offset Voltage and Drift: With an offset voltage as low as 0.05 mV and a drift of 2.5 µV/°C, this amplifier ensures high precision over a wide temperature range.
- High Common-Mode Rejection Ratio (CMRR): The CMRR of 66 dB to 87 dB helps in rejecting common-mode signals effectively.
- Low Noise Performance: The amplifier features low voltage noise (1.9 µV p-p from 0.1 Hz to 10 Hz) and low current noise density (0.4 fA/√Hz at 1 kHz).
- High Gain Bandwidth Product (GBP): With a GBP of 5 MHz, this amplifier is suitable for high-frequency applications.
- Low Supply Current: The supply current is typically 785 µA, making it power-efficient.
Applications
- Buffering CMOS DACs, ASICs, and Other Wide Dynamic Range Signals: The rail-to-rail input and output capabilities make it ideal for buffering a variety of signals.
- Medical Equipment: The high precision and low noise characteristics are beneficial for medical instrumentation and diagnostic equipment.
- Automotive Sensors: Suitable for pressure, position, and strain gage amplifiers in automotive applications.
- Precision Current Sensing and Photodiode Amplifiers: The low offset voltage and high CMRR make it suitable for precision current sensing and photodiode amplification.
- Active Filters and High-Speed Photodiode Preamplifiers: The high GBP and low noise performance are advantageous in these applications.
Q & A
- What is the typical offset voltage of the AD8626AR?
The typical offset voltage is 0.5 mV, with a minimum of 0.05 mV and a maximum of 1.2 mV over the temperature range of –40°C to +85°C. - What is the input bias current of the AD8626AR?
The input bias current is typically 1 pA, with a maximum of 60 pA over the temperature range of –40°C to +85°C. - What is the common-mode rejection ratio (CMRR) of the AD8626AR?
The CMRR is between 66 dB and 87 dB for VCM = 0 V to 2.5 V. - What is the slew rate of the AD8626AR?
The slew rate is 5 V/µs. - What is the gain bandwidth product (GBP) of the AD8626AR?
The GBP is 5 MHz. - What are the typical supply current requirements for the AD8626AR?
The typical supply current is 785 µA, with a maximum of 800 µA over the temperature range of –40°C to +85°C. - What are some common applications of the AD8626AR?
Common applications include buffering CMOS DACs, ASICs, medical equipment, automotive sensors, precision current sensing, and photodiode amplifiers. - Does the AD8626AR require any external components for operation?
No, the AD8626AR does not require any external components for its operation. - What is the phase margin of the AD8626AR?
The phase margin is 60 degrees. - How does the AD8626AR perform in terms of noise?
The AD8626AR features low voltage noise (1.9 µV p-p from 0.1 Hz to 10 Hz) and low current noise density (0.4 fA/√Hz at 1 kHz).
