Overview
The AD8674AR, produced by Analog Devices Inc., is a high-precision operational amplifier known for its exceptional performance in noise reduction and signal amplification. This amplifier features very low noise, low offset voltage and drift, and low input bias current, making it ideal for applications requiring high accuracy and stability.
The AD8674AR is part of the AD8671/AD8672/AD8674 family, which is distinguished by its ultralow noise, high precision, speed, and stability. It operates over a wide range of supply voltages and is available in 14-lead SOIC and 14-lead TSSOP packages, making it versatile for various design needs.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Offset Voltage (VOS) | 30 µV to 125 µV | –40°C to +125°C |
| Input Offset Voltage Drift (∆VOS/∆T) | 0.3 µV/°C to 0.8 µV/°C | –40°C to +125°C |
| Input Bias Current (IB) | –40 nA to +40 nA | –40°C to +125°C |
| Input Offset Current (IOS) | –40 nA to +40 nA | –40°C to +125°C |
| Input Voltage Range | –2.5 V to +2.5 V | |
| Common-Mode Rejection Ratio (CMRR) | 100 dB to 120 dB | VCM = –2.5 V to +2.5 V |
| Gain Bandwidth Product (GBP) | 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 |
| Settling Time (tS) to 0.01% | 5.1 µs | 4 V step, G = 1 |
| Voltage Noise Density (en) | 2.8 nV/√Hz to 3.8 nV/√Hz | f = 1 kHz |
| Peak-to-Peak Noise (en p-p) | 77 nV to 100 nV | 0.1 Hz to 10 Hz |
| Supply Current per Amplifier (ISY) | 3 mA to 4.2 mA | VO = 0 V, –40°C to +125°C |
| Output Voltage High (VOH) | +13.2 V to +13.8 V | RL = 2 kΩ, –40°C to +125°C |
| Output Voltage Low (VOL) | –13.8 V to –13.2 V | RL = 2 kΩ, –40°C to +125°C |
| Output Current (IOUT) | ±20 mA | |
| Power Supply Rejection Ratio (PSRR) | 106 dB to 115 dB | VS = ±4 V to ±18 V |
Key Features
- Very Low Noise: Voltage noise density of 2.8 nV/√Hz to 3.8 nV/√Hz at 1 kHz and peak-to-peak noise of 77 nV to 100 nV from 0.1 Hz to 10 Hz.
- High Precision: Low offset voltage (30 µV to 125 µV) and low offset voltage drift (0.3 µV/°C to 0.8 µV/°C).
- Low Input Bias Current: Input bias current of –40 nA to +40 nA.
- High Bandwidth: Gain bandwidth product of 10 MHz and slew rate of 4 V/µs.
- Low Power Consumption: Supply current per amplifier of 3 mA to 4.2 mA.
- Stable with Capacitive Loads: Outputs are stable with capacitive loads of over 1000 pF.
- Dual-Supply Operation: Operates from ±5 V to ±15 V.
- Compact Packaging: Available in 14-lead SOIC and 14-lead TSSOP packages.
Applications
- High Quality PLL Filters: Ideal for phase-locked loop filters requiring low noise and high precision.
- Precision Filters: Suitable for various precision filtering applications.
- Medical and Analytical Instrumentation: Used in medical and analytical instruments where high accuracy is crucial.
- Precision Power Supply Controls: Employed in precision power supply control circuits.
- ATE and Data Acquisition: Used in automated test equipment and data acquisition systems.
- Precision Controls: Suitable for precision control applications.
- Professional Quality Audio: Ideal for professional audio equipment requiring low noise and high fidelity.
Q & A
- What is the input offset voltage of the AD8674AR?
The input offset voltage of the AD8674AR is between 30 µV and 125 µV over the temperature range of –40°C to +125°C.
- What is the slew rate of the AD8674AR?
The slew rate of the AD8674AR is 4 V/µs with a load resistance of 2 kΩ.
- What is the gain bandwidth product of the AD8674AR?
The gain bandwidth product of the AD8674AR is 10 MHz.
- What are the typical supply currents for the AD8674AR?
The typical supply current per amplifier for the AD8674AR is between 3 mA and 4.2 mA.
- What is the power supply rejection ratio (PSRR) of the AD8674AR?
The power supply rejection ratio (PSRR) of the AD8674AR is between 106 dB and 115 dB for supply voltages from ±4 V to ±18 V.
- What are the output voltage limits of the AD8674AR?
The output voltage high (VOH) is between +13.2 V and +13.8 V, and the output voltage low (VOL) is between –13.8 V and –13.2 V with a load resistance of 2 kΩ.
- What is the maximum output current of the AD8674AR?
The maximum output current of the AD8674AR is ±20 mA.
- What are the typical applications of the AD8674AR?
The AD8674AR is 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 are the available packages for the AD8674AR?
The AD8674AR is available in 14-lead SOIC and 14-lead TSSOP packages.
- What is the operating temperature range of the AD8674AR?
The operating temperature range of the AD8674AR is from –40°C to +125°C.
- How stable is the AD8674AR with capacitive loads?
The AD8674AR is stable with capacitive loads of over 1000 pF.
