Overview
The AD8629ARZ is a zero-drift, single-supply, rail-to-rail input/output operational amplifier produced by Analog Devices Inc. This amplifier is known for its ultralow offset, drift, and bias current, making it ideal for applications requiring high precision and low noise. It operates using a patented combination of auto-zeroing and chopping, which eliminates digital switching noise and 1/f noise, common issues in chopper-stabilized amplifiers. The AD8629ARZ is fully specified for operation from 2.7V to 5V single supply (±1.35V to ±2.5V dual supply), offering a wide bandwidth and high accuracy at a lower cost compared to traditional auto-zeroing or chopper-stabilized amplifiers.
Key Specifications
| Parameter | Value |
|---|---|
| Offset Voltage | 1 µV (typical) |
| Input Offset Drift | 0.002 µV/°C (typical) |
| Input Bias Current | 100 pA (maximum) |
| Supply Current | 1.0 mA (typical) |
| Gain | 130 dB (typical) |
| CMRR (Common Mode Rejection Ratio) | 130 dB (typical) |
| PSRR (Power Supply Rejection Ratio) | 130 dB (typical) |
| Operating Voltage Range | 2.7V to 5V (single supply), ±1.35V to ±2.5V (dual supply) |
| Temperature Range | −40°C to +125°C |
| Package | 8-SOIC (0.154, 3.90mm Width) |
Key Features
- Ultralow offset voltage and drift
- Rail-to-rail input and output swing
- Low noise, including elimination of 1/f noise
- Low input bias current and supply current
- High gain, CMRR, and PSRR
- No external capacitor required
- Wide bandwidth and high accuracy
Applications
- Position and pressure sensors
- Medical equipment
- Strain gauge amplifiers
- Automotive sensors
- Thermocouple amplifiers
- Precision current sensing
- Photodiode amplifiers
Q & A
- What is the typical offset voltage of the AD8629ARZ?
The typical offset voltage is 1 µV. - What is the input offset drift of the AD8629ARZ?
The input offset drift is 0.002 µV/°C. - What is the operating voltage range of the AD8629ARZ?
The operating voltage range is 2.7V to 5V (single supply) and ±1.35V to ±2.5V (dual supply). - What is the typical supply current of the AD8629ARZ?
The typical supply current is 1.0 mA. - Does the AD8629ARZ require an external capacitor?
No, the AD8629ARZ does not require an external capacitor. - What are some common applications of the AD8629ARZ?
Common applications include position and pressure sensors, medical equipment, strain gauge amplifiers, automotive sensors, thermocouple amplifiers, precision current sensing, and photodiode amplifiers. - What is the temperature range of the AD8629ARZ?
The temperature range is −40°C to +125°C. - What is the package type of the AD8629ARZ?
The package type is 8-SOIC (0.154, 3.90mm Width). - How does the AD8629ARZ handle 1/f noise?
The AD8629ARZ eliminates 1/f noise internally, reducing output errors. - What are the benefits of using the AD8629ARZ over traditional chopper-stabilized amplifiers?
The AD8629ARZ combines low cost with high accuracy and low noise, and it greatly reduces digital switching noise found in most chopper-stabilized amplifiers.
