Overview
The AD8672ARZ, produced by Analog Devices Inc., is a high-precision operational amplifier known for its exceptional performance in low noise, low offset voltage, and low input bias current. This amplifier is part of the AD8671/AD8672/AD8674 series, which are designed to offer high precision, speed, and stability. The AD8672 is particularly suited for applications requiring high accuracy and low noise, making it ideal for various industrial and professional uses.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | −40°C < TA < +125°C | 20 | 75 | 125 | μV |
| Offset Voltage Drift | ΔVOS/ΔT | −40°C < TA < +125°C | 0.3 | 0.5 | 0.8 | μV/°C |
| Input Bias Current | IB | +25°C < TA < +125°C | −12 | 3 | 12 | nA |
| Input Offset Current | IOS | +25°C < TA < +125°C | −12 | 6 | 12 | nA |
| Input Voltage Range | −2.5 | 2.5 | V | |||
| Common-Mode Rejection Ratio | CMRR | dB | ||||
| Power Supply Rejection Ratio | PSRR | VS = ±4 V to ±18 V | 110 | 130 | dB | |
| Supply Current/Amplifier | ISY | VO = 0 V, −40°C < TA < +125°C | 3 | 3.5 | 4.2 | mA |
| Slew Rate | SR | RL = 2 kΩ | 4 | V/μs | ||
| Gain Bandwidth Product | GBP | 10 | MHz | |||
| Voltage Noise Density | en | f = 1 kHz | 2.8 | 3.8 | nV/√Hz |
Key Features
- Very low noise: 2.8 nV/√Hz voltage noise density and 77 nV p-p peak-to-peak noise from 0.1 Hz to 10 Hz.
- Low offset voltage: 75 μV max and low offset voltage drift of 0.3 to 0.5 μV/°C.
- Low input bias current: 12 nA max.
- High open-loop gain: 120 dB min.
- Low power consumption: 3 mA typ per amplifier.
- Dual-supply operation: ±5 V to ±15 V.
- Unity-gain stable and no phase reversal.
- Stable with capacitive loads of over 1000 pF.
Applications
- High-quality PLL filters and precision filters.
- Medical and analytical instrumentation.
- Precision power supply controls.
- Automatic Test Equipment (ATE) and data acquisition.
- Precision controls and professional quality audio.
- Sensors and controls.
Q & A
- What is the typical voltage noise density of the AD8672ARZ? The typical voltage noise density is 2.8 nV/√Hz at 1 kHz.
- What is the maximum offset voltage of the AD8672ARZ? The maximum offset voltage is 75 μV.
- What is the input bias current range of the AD8672ARZ? The input bias current range is from -12 nA to 12 nA at +25°C.
- What is the gain bandwidth product of the AD8672ARZ? The gain bandwidth product is 10 MHz.
- What are the operating temperature ranges for the AD8672ARZ? The AD8672ARZ is specified over the extended industrial temperature range of −40°C to +125°C.
- What are the typical supply currents for the AD8672ARZ? The typical supply current per amplifier is 3 mA at VO = 0 V.
- Is the AD8672ARZ stable with capacitive loads? Yes, it is stable with capacitive loads of over 1000 pF.
- What are some common applications of the AD8672ARZ? Common applications include high-quality PLL filters, medical and analytical instrumentation, precision power supply controls, and professional quality audio.
- What is the slew rate of the AD8672ARZ? The slew rate is 4 V/μs with a 2 kΩ load.
- What is the power supply rejection ratio of the AD8672ARZ? The power supply rejection ratio is 110 to 130 dB from ±4 V to ±18 V.
