Overview
The AD8639ARZ-REEL is a precision operational amplifier manufactured by Analog Devices Inc. This auto-zero amplifier is part of the AD8638/AD8639 series, known for its high accuracy, low noise, and low cost. The AD8639 features a rail-to-rail output swing and is fully specified for operation from 5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply. It is particularly suited for applications requiring minimal error sources, such as medical instrumentation, pressure and position sensors, and strain gage amplifiers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 5 V to 16 V, ±2.5 V to ±8 V | V |
| Input Offset Voltage | 3 μV (typical) | μV |
| Offset Voltage Drift | 0.01 μV/°C to 0.04 μV/°C | μV/°C |
| Input Bias Current | 1 pA (maximum) | pA |
| Supply Current | 1.25 mA (typical) | mA |
| Slew Rate | 2 V/μs | V/μs |
| Gain Bandwidth Product | 1.5 MHz | MHz |
| Common Mode Rejection Ratio (CMRR) | 133 dB (typical) | dB |
| Power Supply Rejection Ratio (PSRR) | 143 dB (typical) | dB |
| Operating Temperature Range | -40°C to +125°C | °C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
Key Features
- Auto-Zero Technology: Combines low cost with high accuracy and low noise, eliminating the need for external capacitors.
- Rail-to-Rail Output Swing: Operates from 5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply.
- Low Offset and Drift: Typical offset voltage of 3 μV and drift of 0.01 μV/°C to 0.04 μV/°C.
- Low Input Bias Current: Maximum of 1 pA.
- Low Supply Current: Typical of 1.25 mA.
- High Gain and CMRR/PSRR: Typical gain of 136 dB, CMRR of 133 dB, and PSRR of 143 dB.
- Automotive Qualification: The AD8639 is qualified for automotive applications.[
Applications
- Pressure and Position Sensors: Ideal for precise measurement and amplification in sensor applications.
- Strain Gage Amplifiers: Used in strain gage configurations for accurate strain measurements.
- Medical Instrumentation: Suitable for medical devices requiring high precision and low noise.
- Thermocouple Amplifiers: Used in thermocouple applications for precise temperature measurements.[
- Automotive Sensors: Qualified for use in automotive sensors and other automotive applications.[
- Precision References and Current Sensing: Used in precision reference circuits and current sensing applications.[
Q & A
- What is the typical input offset voltage of the AD8639ARZ-REEL?
The typical input offset voltage is 3 μV.[
- What is the operating temperature range of the AD8639ARZ-REEL?
The operating temperature range is -40°C to +125°C.[
- What is the slew rate of the AD8639ARZ-REEL?
The slew rate is 2 V/μs.[
- Is the AD8639ARZ-REEL qualified for automotive applications?
Yes, the AD8639 is qualified for automotive applications.[
- What is the typical supply current of the AD8639ARZ-REEL?
The typical supply current is 1.25 mA.[
- What is the gain bandwidth product of the AD8639ARZ-REEL?
The gain bandwidth product is 1.5 MHz.[
- Does the AD8639ARZ-REEL require external capacitors?
No, the AD8639ARZ-REEL does not require external capacitors.[
- What is the common mode rejection ratio (CMRR) of the AD8639ARZ-REEL?
The CMRR is typically 133 dB.[
- What is the power supply rejection ratio (PSRR) of the AD8639ARZ-REEL?
The PSRR is typically 143 dB.[
- What package types are available for the AD8639ARZ-REEL?
The AD8639ARZ-REEL is available in an 8-SOIC package.[
