Overview
The AD8643ARZ-REEL7, produced by Analog Devices Inc., is a low power, precision JFET input amplifier. It features extremely low input bias current and rail-to-rail output, making it suitable for a wide range of applications. This amplifier is designed to operate in single-supply and dual-supply configurations, with a voltage range of 5V to 26V and ±2.5V to ±13V, respectively. Its ability to swing nearly rail-to-rail at both the input and output enables it to buffer devices such as CMOS DACs, ASICs, and other wide output swing devices in single-supply systems. The AD8643ARZ-REEL7 is particularly useful in applications requiring low power consumption to manage heat, such as multichannel boards.
Key Specifications
| Parameter | Typical Value | Units |
|---|---|---|
| Input Bias Current | 0.25 | pA |
| Offset Voltage | 50 | μV |
| Supply Current/Amplifier | 195 | μA |
| Output Voltage High (VOH) | 4.95 | V (at IL = 1 mA, -40°C to +125°C) |
| Output Voltage Low (VOL) | 0.05 | V (at IL = 1 mA, -40°C to +125°C) |
| Output Current (IOUT) | ±12 | mA |
| Power Supply Rejection Ratio (PSRR) | 90 to 107 | dB |
| Slew Rate (SR) | 3 | V/μs |
| Gain Bandwidth Product (GBP) | 3.5 | MHz |
| Phase Margin (Øm) | 60 | Degrees |
| Voltage Noise (eN p-p) | 4.2 | μV p-p (f = 0.1 Hz to 10 Hz) |
| Voltage Noise Density (eN) | 27.5 | nV/√Hz (at f = 1 kHz) |
| Current Noise Density (iN) | 0.5 | fA/√Hz (at f = 1 kHz) |
| Operating Temperature Range | -40°C to +125°C | |
| Package Style | 14-lead SOIC |
Key Features
- Extremely low input bias current of 0.25 pA typical, ensuring minimal signal distortion.
- Rail-to-rail output, allowing for full voltage swing at the output.
- Unity-gain stable with no phase reversal.
- Low offset voltage of 50 μV typical.
- Low power consumption with a supply current of 195 μA per amplifier.
- Wide power supply voltage range: 5V to 26V and ±2.5V to ±13V.
- High slew rate of 3 V/μs and gain bandwidth product of 3.5 MHz.
- Four independent amplification channels, enabling simultaneous processing of multiple signal channels.
- Operating temperature range of -40°C to +125°C, enhancing lifespan and performance.
- Lead-free and RoHS compliant, suitable for environmentally friendly designs.
Applications
- Line- and battery-powered instruments: Ideal for portable and low-power devices.
- Photodiode amplifiers: Used in applications requiring low noise and high precision.
- Precision current sensing: Suitable for accurate current measurement in various systems.
- Medical instrumentation: Used in medical devices and diagnostic systems to enhance signal accuracy and precision.
- Industrial controls: Applied in industrial automation, control equipment, and measuring instruments.
- Precision filters: Utilized in filtering applications requiring high precision and low noise.
- Portable audio: Enhances the volume and clarity of sound in audio systems.
- ATE (Automated Test Equipment): Used as reference level drivers and in other ATE applications.
- Video equipment: Enhances the brightness and contrast of video signals in TVs, monitors, and projectors.
Q & A
- What is the typical input bias current of the AD8643ARZ-REEL7?
The typical input bias current is 0.25 pA.
- What is the operating temperature range of the AD8643ARZ-REEL7?
The operating temperature range is -40°C to +125°C.
- What is the power supply voltage range for the AD8643ARZ-REEL7?
The power supply voltage range is 5V to 26V for single-supply and ±2.5V to ±13V for dual-supply configurations.
- How many independent amplification channels does the AD8643ARZ-REEL7 have?
The AD8643ARZ-REEL7 has four independent amplification channels.
- What is the slew rate of the AD8643ARZ-REEL7?
The slew rate is 3 V/μs.
- What is the gain bandwidth product (GBP) of the AD8643ARZ-REEL7?
The gain bandwidth product is 3.5 MHz.
- Is the AD8643ARZ-REEL7 RoHS compliant?
Yes, the AD8643ARZ-REEL7 is lead-free and RoHS compliant.
- What are some common applications of the AD8643ARZ-REEL7?
Common applications include line- and battery-powered instruments, photodiode amplifiers, precision current sensing, medical instrumentation, industrial controls, precision filters, portable audio, and ATE.
- What is the typical output current of the AD8643ARZ-REEL7?
The typical output current is ±12 mA.
- What package style does the AD8643ARZ-REEL7 come in?
The AD8643ARZ-REEL7 comes in a 14-lead SOIC package.
