Overview
The AD8672ARM-R2 is a high-precision, dual operational amplifier produced by Analog Devices Inc. It is renowned for its very low noise, low offset voltage, and low input bias current, making it suitable for a wide range of precision applications. The amplifier features a high open-loop gain, low power consumption, and stability with capacitive loads, ensuring reliable performance in various environments.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Offset Voltage (VOS) | 20 µV to 125 µV | –40°C to +125°C |
| Offset Voltage Drift (∆VOS/∆T) | 0.3 µV/°C to 0.8 µV/°C | –40°C to +125°C |
| Input Bias Current (IB) | –12 nA to +12 nA | +25°C to +125°C |
| Input Offset Current (IOS) | –12 nA to +12 nA | +25°C to +125°C |
| Common-Mode Rejection Ratio (CMRR) | 100 dB to 120 dB | VCM = –2.5 V to +2.5 V |
| Slew Rate (SR) | 4 V/µs | RL = 2 kΩ |
| Gain Bandwidth Product (GBP) | 10 MHz | |
| Voltage Noise Density (en) | 2.8 nV/√Hz to 3.8 nV/√Hz | f = 1 kHz |
| Supply Current per Amplifier (ISY) | 3 mA to 3.5 mA | VO = 0 V, –40°C to +125°C |
| Operating Temperature Range | –40°C to +125°C | |
| Package Type | MSOP, TSSOP |
Key Features
- Very low noise: 2.8 nV/√Hz to 3.8 nV/√Hz at 1 kHz.
- Low offset voltage: 20 µV to 125 µV.
- Low input bias current: –12 nA to +12 nA.
- High open-loop gain: 1000 to 6000 V/mV.
- Low power consumption: 3 mA to 3.5 mA per amplifier.
- Stable with capacitive loads of over 1000 pF.
- Dual-supply operation: ±5 V to ±15 V.
- Unity-gain stable.
- No phase reversal.
Applications
- High-quality PLL filters.
- Precision filters for GPS and other applications.
- Medical and analytical instrumentation.
- Precision power supply controls.
- Automated Test Equipment (ATE).
- Data acquisition systems.
- Precision controls.
- Professional quality audio systems.
Q & A
- What is the typical supply current per amplifier for the AD8672ARM-R2?
The typical supply current per amplifier is 3 mA to 3.5 mA at VO = 0 V and –40°C to +125°C.
- What is the offset voltage range for the AD8672ARM-R2?
The offset voltage range is 20 µV to 125 µV over the temperature range of –40°C to +125°C.
- What is the slew rate of the AD8672ARM-R2?
The slew rate is 4 V/µs with a load resistance of 2 kΩ.
- What are the operating temperature ranges for the AD8672ARM-R2?
The operating temperature range is –40°C to +125°C.
- What are the typical noise specifications for the AD8672ARM-R2?
The voltage noise density is 2.8 nV/√Hz to 3.8 nV/√Hz at 1 kHz, and the peak-to-peak noise is 77 nV to 100 nV over 0.1 Hz to 10 Hz).
- Is the AD8672ARM-R2 stable with capacitive loads?
Yes, the AD8672ARM-R2 is stable with capacitive loads of over 1000 pF).
- What are the common applications of the AD8672ARM-R2?
Common applications include high-quality PLL filters, precision filters, medical and analytical instrumentation, precision power supply controls, ATE, data acquisition, and professional quality audio systems).
- What is the package type for the AD8672ARM-R2?
The AD8672ARM-R2 is available in MSOP and TSSOP packages).
- Does the AD8672ARM-R2 support dual-supply operation?
Yes, the AD8672ARM-R2 supports dual-supply operation from ±5 V to ±15 V).
- Is the AD8672ARM-R2 unity-gain stable?
Yes, the AD8672ARM-R2 is unity-gain stable and does not exhibit phase reversal).
