Overview
The AD8642ARMZ-R2, produced by Analog Devices Inc., is a low power, precision JFET input operational amplifier. It is part of the AD8641/AD8642/AD8643 family, known for its extremely low input bias current and rail-to-rail output. This amplifier is designed to operate in single-supply systems and is suitable for a wide range of applications requiring high precision and low power consumption.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Bias Current | Extremely low | - |
| Output Voltage High (VOH) | 4.95 V | IL = 1 mA, -40°C to +125°C |
| Output Voltage Low (VOL) | 0.05 V | IL = 1 mA, -40°C to +125°C |
| Output Current (IOUT) | ±6 mA | - |
| Power Supply Rejection Ratio (PSRR) | 90 dB to 107 dB | VS = 5 V to 26 V |
| Supply Current/Amplifier (ISY) | 195 µA to 250 µA | -40°C < TA < +125°C |
| Slew Rate (SR) | 3 V/µs | - |
| Gain Bandwidth Product (GBP) | 3.5 MHz | - |
| Phase Margin (Øm) | 60 Degrees | - |
| Voltage Noise Density (eN) | 27.5 nV/√Hz | f = 1 kHz |
| Current Noise Density (iN) | 0.5 fA/√Hz | f = 1 kHz |
| Operating Temperature Range | -40°C to +125°C | - |
| Package | 8-MSOP | - |
Key Features
- Extremely low input bias current
- Rail-to-rail output
- Low power consumption
- Stable operation with capacitive loads of more than 500 pF
- Full specification over the extended industrial temperature range of -40°C to +125°C
- Suitable for multichannel boards requiring low power to manage heat
Applications
- Line- and battery-powered instruments
- Photodiode amplifiers
- Precision current sensing
- Medical instrumentation
- Industrial controls
- Precision filters
- Portable audio
- Automatic Test Equipment (ATE) reference level drivers
- Battery management
Q & A
- What is the input bias current of the AD8642ARMZ-R2? The input bias current is extremely low, making it suitable for high precision applications.
- What is the output voltage range of the AD8642ARMZ-R2? The output voltage range is nearly rail-to-rail, with VOH of 4.95 V and VOL of 0.05 V at IL = 1 mA.
- What is the power supply rejection ratio (PSRR) of the AD8642ARMZ-R2? The PSRR is 90 dB to 107 dB for supply voltages from 5 V to 26 V.
- What is the slew rate of the AD8642ARMZ-R2? The slew rate is 3 V/µs.
- What is the gain bandwidth product (GBP) of the AD8642ARMZ-R2? The GBP is 3.5 MHz.
- What is the phase margin of the AD8642ARMZ-R2? The phase margin is 60 degrees.
- What is the operating temperature range of the AD8642ARMZ-R2? The operating temperature range is -40°C to +125°C.
- What package is the AD8642ARMZ-R2 available in? The AD8642ARMZ-R2 is available in an 8-MSOP package.
- What are some typical applications of the AD8642ARMZ-R2? Typical applications include line- and battery-powered instruments, photodiode amplifiers, precision current sensing, medical instrumentation, and industrial controls.
- How stable is the AD8642ARMZ-R2 with capacitive loads? The AD8642ARMZ-R2 remains stable with capacitive loads of more than 500 pF.
