Overview
The AD8639ARZ-REEL7 is a precision operational amplifier produced by Analog Devices Inc. This device is part of the AD8638/AD8639 family, which features auto-zero, rail-to-rail output swing, and low noise characteristics. The AD8639 is particularly noted for its high accuracy, low offset voltage, and minimal drift, making it suitable for applications requiring high precision and reliability. It operates over a wide supply voltage range from 5 V to 16 V single-supply or ±2.5 V to ±8 V dual-supply, and it is qualified for automotive applications.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage | 5 V to 16 V (single-supply), ±2.5 V to ±8 V (dual-supply) | |
| Offset Voltage | 3 μV (typical) | |
| Offset Voltage Drift | 0.01 μV/°C (typical), 0.04 μV/°C (SOT-23 package) | −40°C ≤ TA ≤ +125°C |
| Input Bias Current | 40 pA (maximum) | |
| Supply Current | 1.3 mA (maximum) | |
| Gain Bandwidth Product | 1.35 MHz | RL = 2 kΩ, CL = 20 pF, AV = 1 |
| Phase Margin | 70 Degrees | RL = 2 kΩ, CL = 20 pF, AV = 1 |
| Voltage Noise (0.1 Hz to 10 Hz) | 1.2 μV p-p | |
| Voltage Noise Density at 1 kHz | 60 nV/√Hz | |
| Operating Temperature Range | −40°C to +125°C |
Key Features
- Auto-zero topology for high accuracy and low noise
- Rail-to-rail output swing
- Low offset voltage and drift
- Very low input bias current (40 pA maximum)
- Low supply current (1.3 mA maximum)
- High gain (136 dB typical) and high CMRR (133 dB typical) and PSRR (143 dB typical)
- No external capacitors required
- Qualified for automotive applications
Applications
- Pressure and position sensors
- Strain gage amplifiers
- Medical instrumentation
- Thermocouple amplifiers
- Automotive sensors
- Precision references and current sensing
Q & A
- What is the typical offset voltage of the AD8639ARZ-REEL7?
The typical offset voltage is 3 μV.
- What is the operating temperature range of the AD8639ARZ-REEL7?
The operating temperature range is −40°C to +125°C.
- Does the AD8639ARZ-REEL7 require external capacitors?
No, external capacitors are not required.
- What is the gain bandwidth product of the AD8639ARZ-REEL7?
The gain bandwidth product is 1.35 MHz.
- What are the typical applications of the AD8639ARZ-REEL7?
Typical applications include pressure and position sensors, strain gage amplifiers, medical instrumentation, thermocouple amplifiers, and automotive sensors.
- What is the phase margin of the AD8639ARZ-REEL7?
The phase margin is 70 degrees.
- What is the voltage noise density at 1 kHz for the AD8639ARZ-REEL7?
The voltage noise density at 1 kHz is 60 nV/√Hz.
- Is the AD8639ARZ-REEL7 qualified for automotive applications?
- What is the input bias current of the AD8639ARZ-REEL7?
The input bias current is 40 pA maximum.
- What is the supply current of the AD8639ARZ-REEL7?
The supply current is 1.3 mA maximum).
