Overview
The AD8641ARZ is a low power, precision JFET input operational amplifier designed by Analog Devices, Inc. This device is characterized by its extremely low input bias current and rail-to-rail output, making it highly suitable for various applications in single-supply systems. It can buffer a wide range of devices, including CMOS DACs and ASICs, due to its ability to swing nearly rail-to-rail at both the input and output. The AD8641ARZ is ideal for applications requiring high accuracy, stability, and low power consumption.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Bias Current | IB | -40°C to +125°C | 0.25 | 1 | 260 | pA |
| Input Offset Voltage | VOS | -40°C to +125°C | 50 | 750 | 1.5 mV | µV |
| Input Voltage Range | - | -13 V to +10 V | - | - | - | V |
| Output Voltage High | VOH | IL = 1 mA, -40°C to +125°C | 4.94 | 4.95 | - | V |
| Output Voltage Low | VOL | IL = 1 mA, -40°C to +125°C | 0.01 | 0.05 | - | V |
| Output Current | IOUT | - | - | ±6 mA | - | mA |
| Supply Current/Amplifier | ISY | -40°C to +125°C | 195 | 250 | 270 | µA |
| Supply Voltage Range | - | Single Supply: 5 V to 26 V, Dual Supply: ±2.5 V to ±13 V | - | - | - | V |
| Slew Rate | SR | - | - | 3 V/µs | - | V/µs |
| Gain Bandwidth Product | GBP | - | - | 3.5 MHz | - | MHz |
| Voltage Noise Density | eN | f = 1 kHz | - | 28.5 nV/√Hz | - | nV/√Hz |
Key Features
- Low power consumption with a supply current of 195 µA typical.
- Extremely low input bias current of 0.25 pA typical.
- Low offset voltage of 50 µV typical.
- Rail-to-rail output, unity-gain stable, with no phase reversal.
- Wide supply voltage range: single supply from 5 V to 26 V and dual supply from ±2.5 V to ±13 V.
- High speed performance with a slew rate of 3 V/µs and a gain bandwidth product of 3.5 MHz.
- Low noise performance with a voltage noise density of 28.5 nV/√Hz at 1 kHz.
- High common-mode rejection ratio (CMRR) of 93 dB typical.
- Operating temperature range from -40°C to +125°C.
- Available in an 8-lead SOIC package.
Applications
- Instrumentation and control systems.
- Data acquisition systems.
- Sensor interfacing applications.
- Battery-powered instrumentation.
- Audio signal processing and portable audio equipment.
- Photodiode amplifiers and ATE reference level drivers.
- Battery management and industrial controls.
- Precision current sensing and medical instrumentation.
- Precision filters and line/battery-powered instruments.
Q & A
- What is the typical input bias current of the AD8641ARZ?
The typical input bias current is 0.25 pA. - What is the operating temperature range of the AD8641ARZ?
The operating temperature range is from -40°C to +125°C. - What is the supply voltage range for the AD8641ARZ?
The supply voltage range is from 5 V to 26 V for single supply and ±2.5 V to ±13 V for dual supply. - What is the slew rate of the AD8641ARZ?
The slew rate is 3 V/µs. - What is the gain bandwidth product of the AD8641ARZ?
The gain bandwidth product is 3.5 MHz. - What is the typical voltage noise density of the AD8641ARZ at 1 kHz?
The typical voltage noise density is 28.5 nV/√Hz at 1 kHz. - In what package is the AD8641ARZ available?
The AD8641ARZ is available in an 8-lead SOIC package. - What are some common applications of the AD8641ARZ?
Common applications include instrumentation, data acquisition, sensor interfacing, battery-powered instrumentation, audio signal processing, and industrial controls. - Does the AD8641ARZ support rail-to-rail output?
Yes, the AD8641ARZ supports rail-to-rail output. - What is the typical common-mode rejection ratio (CMRR) of the AD8641ARZ?
The typical CMRR is 93 dB.
