Overview
The AD706AR, produced by Analog Devices Inc., is a dual low drift operational amplifier known for its high DC precision and low input bias current. This bipolar op amp combines the benefits of both bipolar and BiFET (Bipolar Junction Field-Effect Transistor) amplifiers, offering low drift and high DC precision. It is particularly suited for applications requiring low noise and high source impedance compatibility.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage | Initial | 30 | 100 | - | µV |
| Input Offset Voltage | TMIN to TMAX | 40 | 150 | - | µV |
| Input Bias Current | VCM = 0 V | 50 | 200 | - | pA |
| Supply Voltage | - | ±2.0 | - | ±18 | V |
| Quiescent Current | Total | 0.75 | 1.2 | - | mA |
| Operating Temperature Range | - | -40 | - | 85 | °C |
| Package Type | - | - | - | 8-SOIC | - |
| Slew Rate | - | - | 0.15 | - | V/µs |
| -3dB Bandwidth | - | - | 800 | - | kHz |
Key Features
- High DC Precision: The AD706AR offers microvolt offset voltage and low offset drift, making it suitable for high precision applications.
- Low Input Bias Current: With a maximum input bias current of 200 pA, it provides characteristics similar to BiFET amplifiers but with the stability of bipolar amplifiers.
- Low Noise: Features 0.5 V p-p voltage noise from 0.1 Hz to 10 Hz, and low current noise of 50 fA/√Hz, making it ideal for high source impedance applications.
- Low Power Consumption: Operates with a quiescent current of 750 µA per amplifier, suitable for high-density boards.
- Temperature Stability: The input bias current drift is minimal over temperature, increasing only by 5% at 125°C.
- Multiple Packages: Available in 8-lead plastic mini-DIP and surface-mount (SOIC) packages.
Applications
- Low Frequency Active Filters: Ideal for use in 12-bit and 14-bit data acquisition systems.
- Precision Instrumentation: Suitable for applications requiring high precision and low noise.
- Precision Integrators: Offers high quality integration capabilities.
- High Source Impedance Applications: Can be used where high source impedance is a requirement.
Q & A
- What is the maximum input bias current of the AD706AR?
The maximum input bias current of the AD706AR is 200 pA.
- What is the typical quiescent current of the AD706AR?
The typical quiescent current of the AD706AR is 750 µA per amplifier.
- What are the operating temperature ranges for the AD706AR?
The AD706AR operates over a temperature range of -40°C to 85°C.
- What is the slew rate of the AD706AR?
The slew rate of the AD706AR is 0.15 V/µs.
- What is the -3dB bandwidth of the AD706AR?
The -3dB bandwidth of the AD706AR is 800 kHz.
- What types of packages are available for the AD706AR?
The AD706AR is available in 8-lead plastic mini-DIP and surface-mount (SOIC) packages.
- What are some typical applications of the AD706AR?
The AD706AR is typically used in low frequency active filters, precision instrumentation, and as a high quality integrator.
- How does the AD706AR compare to BiFET amplifiers in terms of input bias current drift?
The AD706AR has a significantly lower input bias current drift over temperature compared to BiFET amplifiers, increasing only by 5% at 125°C.
- What is the voltage noise of the AD706AR?
The AD706AR has a voltage noise of 0.5 V p-p from 0.1 Hz to 10 Hz.
- Is the AD706AR internally compensated for unity gain?
Yes, the AD706AR is internally compensated for unity gain.
