Overview
The AD8674ARU, 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 series, which are renowned for their ultralow noise, high precision, speed, and stability. The AD8674 is particularly suited for applications requiring high accuracy and low noise, such as PLL filters, precision filters, medical and analytical instrumentation, and professional quality audio.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Offset Voltage (VOS) | 75 µV max | –40°C < TA < +85°C |
| Offset Voltage Drift (∆VOS/∆T) | 0.3 to 0.8 µV/°C | –40°C < TA < +85°C |
| Input Bias Current (IB) | –40 to +40 nA | –40°C < TA < +125°C |
| Input Offset Current (IOS) | –40 to +40 nA | –40°C < TA < +125°C |
| Input Voltage Range | –2.5 V to +2.5 V | |
| Common-Mode Rejection Ratio (CMRR) | 100 to 120 dB | VCM = –2.5 V to +2.5 V |
| Bandwidth | 10 MHz | |
| Slew Rate (SR) | 4 V/µs | RL = 2 kΩ |
| Settling Time (tS) to 0.1% | 1.4 µs | 4 V step, G = 1 |
| Gain Bandwidth Product (GBP) | 10 MHz | |
| Voltage Noise Density (en) | 2.8 to 3.8 nV/√Hz | f = 1 kHz |
| Power Supply Rejection Ratio (PSRR) | 106 to 115 dB | VS = ±4 V to ±18 V |
| Supply Current per Amplifier (ISY) | 3 to 3.5 mA | VO = 0 V, –40°C < TA < +85°C |
| Output Voltage High (VOH) | +13.2 to +13.8 V | RL = 2 kΩ, –40°C to +125°C |
| Output Voltage Low (VOL) | –13.8 to –13.2 V | RL = 2 kΩ, –40°C to +125°C |
| Output Current (IOUT) | ±20 mA |
Key Features
- Very low noise: 2.8 nV/√Hz voltage noise density and 77 nV p-p peak-to-peak noise.
- Low offset voltage: 75 µV max and low offset voltage drift.
- Low input bias current: –40 to +40 nA.
- High bandwidth: 10 MHz and high slew rate: 4 V/µs.
- Low power consumption: Supply current less than 3 mA per amplifier.
- Dual-supply operation: ±5 V to ±15 V and unity-gain stable with no phase reversal.
- Stable with capacitive loads of over 1000 pF.
- High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR).
Applications
- High-quality PLL filters and precision filters.
- Medical and analytical instrumentation.
- Precision power supply controls.
- Automated Test Equipment (ATE) and data acquisition.
- Precision controls and sensors.
- Professional quality audio systems.
- Filters for GPS and other high-precision applications.
Q & A
- What is the typical voltage noise density of the AD8674?
The typical voltage noise density of the AD8674 is 2.8 to 3.8 nV/√Hz at 1 kHz.
- What is the maximum offset voltage of the AD8674?
The maximum offset voltage of the AD8674 is 75 µV.
- What is the input bias current range of the AD8674?
The input bias current range of the AD8674 is –40 to +40 nA.
- What is the bandwidth of the AD8674?
The bandwidth of the AD8674 is 10 MHz.
- What is the slew rate of the AD8674?
The slew rate of the AD8674 is 4 V/µs.
- What is the supply current per amplifier for the AD8674?
The supply current per amplifier for the AD8674 is typically 3 to 3.5 mA.
- What are the typical output voltage ranges for the AD8674?
The typical output voltage ranges for the AD8674 are +13.2 to +13.8 V and –13.8 to –13.2 V for a 2 kΩ load.
- What are the common applications of the AD8674?
The AD8674 is commonly used in 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 temperature range for the AD8674?
The AD8674 is specified over the industrial temperature range of –40°C to +85°C.
- What packages are available for the AD8674?
The AD8674 is available in 14-lead SOIC and 14-lead TSSOP packages.
