Overview
The AD8671ARM-REEL, produced by Analog Devices Inc., is a high-precision operational amplifier known for its very low noise, low offset voltage, and low input bias current. This amplifier is part of the AD8671/AD8672/AD8674 family, which is renowned for its ultralow noise, high precision, speed, and stability. The AD8671 is particularly suited for applications requiring high accuracy and low noise, making it ideal for various precision and high-quality applications.
Key Specifications
| Parameter | Typical Value | Maximum Value |
|---|---|---|
| Offset Voltage (VOS) | 20 µV | 75 µV (–40°C to +125°C) |
| Offset Voltage Drift (∆VOS/∆T) | 0.3 µV/°C | 0.5 µV/°C (AD8671), 0.8 µV/°C (AD8672/AD8674) |
| Input Bias Current (IB) | 3 nA | 12 nA (+25°C to +125°C), 40 nA (–40°C to +125°C) |
| Input Offset Current (IOS) | 6 nA | 12 nA (+25°C to +125°C), 40 nA (–40°C to +125°C) |
| Bandwidth | 10 MHz | |
| Slew Rate (SR) | 4 V/µs | |
| Settling Time (tS) to 0.1% (4 V step, G = 1) | 1.4 µs | |
| Supply Current per Amplifier (ISY) | 3 mA | 3.5 mA (–40°C to +125°C), 4.2 mA |
| Power Supply Rejection Ratio (PSRR) | 110 dB | 130 dB (AD8671/AD8672), 115 dB (AD8674) |
| Output Voltage High (VOH) at RL = 2 kΩ | +13.2 V | +13.8 V (–40°C to +125°C) |
| Output Voltage Low (VOL) at RL = 2 kΩ | –13.8 V | –13.2 V (–40°C to +125°C) |
| Output Current (IOUT) | ±20 mA | |
| Short Circuit Current (ISC) | ±30 mA |
Key Features
- Very low noise: 2.8 nV/√Hz at 1 kHz and 77 nV p-p from 0.1 Hz to 10 Hz.
- Low offset voltage and drift: 75 µV max and 0.3 µV/°C to 0.5 µV/°C.
- Low input bias current: 12 nA max.
- High bandwidth: 10 MHz.
- Low power consumption: 3 mA typical supply current per amplifier.
- Stable with capacitive loads over 1000 pF.
- Dual-supply operation: ±5 V to ±15 V.
- Unity-gain stable with no phase reversal.
- Available in 8-lead SOIC and 8-lead MSOP packages for AD8671/AD8672, and 14-lead SOIC and 14-lead TSSOP packages for AD8674.
Applications
- High-quality PLL filters.
- Precision filters.
- Medical and analytical instrumentation.
- Precision power supply controls.
- Automated Test Equipment (ATE).
- Data acquisition.
- Precision controls.
- Professional quality audio.
Q & A
- What is the typical offset voltage of the AD8671?
The typical offset voltage of the AD8671 is 20 µV, with a maximum of 75 µV over the temperature range of –40°C to +125°C.
- What is the bandwidth of the AD8671?
The bandwidth of the AD8671 is 10 MHz.
- What is the slew rate of the AD8671?
The slew rate of the AD8671 is 4 V/µs.
- What is the supply current per amplifier for the AD8671?
The supply current per amplifier for the AD8671 is typically 3 mA, with a maximum of 3.5 mA over the temperature range of –40°C to +125°C.
- What are the package options for the AD8671?
The AD8671 is available in 8-lead SOIC and 8-lead MSOP packages.
- What are some common applications of the AD8671?
The AD8671 is commonly used in high-quality PLL filters, precision filters, medical and analytical instrumentation, precision power supply controls, ATE, data acquisition, precision controls, and professional quality audio.
- What is the input bias current of the AD8671?
The input bias current of the AD8671 is typically 3 nA, with a maximum of 12 nA at +25°C to +125°C and 40 nA at –40°C to +125°C.
- What is the noise performance of the AD8671?
The AD8671 has a voltage noise density of 2.8 nV/√Hz at 1 kHz and a peak-to-peak noise of 77 nV from 0.1 Hz to 10 Hz.
- Is the AD8671 stable with capacitive loads?
Yes, the AD8671 is stable with capacitive loads over 1000 pF.
- What is the temperature range for the AD8671?
The AD8671 is specified over the extended industrial temperature range of –40°C to +125°C.
