Overview
The AD706ARZ is a dual, low power, bipolar operational amplifier (op amp) manufactured by Analog Devices Inc. This device is notable for its high DC precision and low input bias current, combining the benefits of both JFET and bipolar amplifiers. The AD706ARZ is designed to offer low drift and high DC precision, making it suitable for a variety of precision applications.
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 Offset Voltage Drift | Average TC | 0.2 | 1.5 | - | µV/°C |
| Input Bias Current | VCM = 0 V | 50 | 200 | - | pA |
| Input Bias Current Drift | Average TC | 0.3 | - | - | pA/°C |
| Common-Mode Rejection Ratio | VCM = ±13.5 V | 110 | 132 | - | dB |
| Input Current Noise | 0.1 Hz to 10 Hz | - | 3 | - | pA p-p |
| Input Voltage Noise | 0.1 Hz to 10 Hz | - | 0.5 | - | µV p-p |
| Open-Loop Gain | VO = ±12 V, RLOAD = 10 kΩ | 200 | 2000 | - | V/mV |
| Output Voltage Swing | RLOAD = 10 kΩ | ±13 | ±14 | - | V |
| Supply Current | Per Amplifier | - | - | 600 | µA |
Key Features
- High DC precision with low offset voltage (100 µV max) and low offset drift (1.5 µV/°C max).
- Low input bias current (200 pA max) with minimal drift over temperature, combining the benefits of JFET and bipolar amplifiers.
- Low noise characteristics: 0.5 µV p-p voltage noise and 3 pA p-p current noise from 0.1 Hz to 10 Hz.
- High common-mode rejection ratio (CMRR) of 110 dB to 132 dB.
- Internally compensated for unity gain and available in five performance grades.
- Available in 8-lead PDIP and surface-mount SOIC packages.
Applications
The AD706ARZ is well-suited for various precision applications, including:
- Low frequency active filters in 12-bit and 14-bit data acquisition systems.
- Precision instrumentation where high DC accuracy and low noise are critical.
- High quality integrators in analog circuits.
- Circuits that would typically require a chopper amplifier but benefit from the lower noise of the AD706ARZ.
Q & A
- What is the maximum input offset voltage of the AD706ARZ?
The maximum input offset voltage is 100 µV. - What is the typical input bias current of the AD706ARZ?
The typical input bias current is 200 pA. - What is the common-mode rejection ratio (CMRR) of the AD706ARZ?
The CMRR is between 110 dB and 132 dB. - What are the package options for the AD706ARZ?
The AD706ARZ is available in 8-lead PDIP and surface-mount SOIC packages. - What are the typical applications of the AD706ARZ?
It is used in low frequency active filters, precision instrumentation, and as a high quality integrator. - How does the AD706ARZ compare to JFET amplifiers in terms of input bias current drift?
The AD706ARZ has significantly lower input bias current drift compared to JFET amplifiers. - What is the maximum supply current per amplifier for the AD706ARZ?
The maximum supply current per amplifier is 600 µA. - What is the output voltage swing of the AD706ARZ?
The output voltage swing is ±13 V to ±14 V with a 10 kΩ load. - Is the AD706ARZ internally compensated for unity gain?
Yes, the AD706ARZ is internally compensated for unity gain. - What are the temperature ranges for the different grades of the AD706ARZ?
The AD706J is rated for 0°C to +70°C, and the AD706A is rated for –40°C to +85°C.
