Overview
The AD8205WYRZ-R7 is a single-supply difference amplifier manufactured by Analog Devices Inc. This component is designed to amplify small differential voltages in the presence of large common-mode voltages, making it suitable for various high-voltage and high-precision applications.
The AD8205 features a robust design with integrated components such as amplifiers, a resistor network, a small voltage reference, and a bias circuit. It is particularly useful in environments where common-mode rejection is crucial, such as in automotive and industrial settings.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| GAIN Initial Accuracy | ±1 | 50 | ±1 | % |
| GAIN Accuracy Over Temperature | ±1.2 | ±1.2 | % | |
| GAIN vs. Temperature | ±30 | ±30 | ppm/°C | |
| Offset Voltage (RTI) at 25°C | ±2 | ±2 | mV | |
| Offset Voltage (RTI) Over Temperature | ±4.5 | ±4.5 | mV | |
| Offset Drift | 15 | 15 | µV/°C | |
| Input Impedance Differential | 400 | 400 | kΩ | |
| Input Impedance Common Mode | 200 | 200 | kΩ | |
| Input Voltage Range Common Mode | -2 | 65 | V | |
| Input Voltage Range Differential | ±50 | ±50 | mV | |
| Common-Mode Rejection Ratio (CMRR) | 78 | 86 | 78 | dB |
| Operating Temperature Range (Y and W Grade) | -40 | 125 | °C | |
| Operating Temperature Range (H Grade) | -40 | 150 | °C |
Key Features
- Single-Supply Operation: The AD8205 operates from a single supply voltage ranging from 5 V to 42 V, making it versatile for various applications.
- High Common-Mode Rejection Ratio (CMRR): Offers a CMRR better than 78 dB from dc to 20 kHz, ensuring high accuracy in the presence of large common-mode voltages.
- Adjustable Output Offset: The output offset can be adjusted from 0.05 V to 4.8 V, supporting both unipolar and bipolar operation.
- Input Attenuation Network: Features an input attenuation ratio of 1/16.7, which helps in reducing the common-mode voltage to match the input voltage range of the amplifier.
- Robust Temperature Range: Operates over a wide temperature range, with Y and W grades from -40°C to +125°C and H grade from -40°C to +150°C.
Applications
- Automotive Systems: The AD8205WYRZ-R7 is designed to support the quality and reliability requirements of automotive applications, including high-voltage and high-precision sensing.
- Industrial Automation: Suitable for industrial environments where high common-mode rejection and robust temperature performance are necessary.
- Medical Devices: Can be used in medical instrumentation where precise voltage measurements are critical.
- High-Voltage Sensing: Ideal for applications requiring the measurement of small differential voltages in the presence of large common-mode voltages.
Q & A
- What is the primary function of the AD8205WYRZ-R7?
The AD8205WYRZ-R7 is a single-supply difference amplifier designed to amplify small differential voltages in the presence of large common-mode voltages.
- What is the operating temperature range for the Y and W grades of the AD8205?
The operating temperature range for the Y and W grades is from -40°C to +125°C.
- What is the operating temperature range for the H grade of the AD8205?
The operating temperature range for the H grade is from -40°C to +150°C.
- What is the common-mode rejection ratio (CMRR) of the AD8205?
The CMRR of the AD8205 is better than 78 dB from dc to 20 kHz.
- Can the output offset of the AD8205 be adjusted?
- What is the input attenuation ratio of the AD8205?
The input attenuation ratio is 1/16.7.
- What are the typical applications of the AD8205WYRZ-R7?
The AD8205WYRZ-R7 is typically used in automotive systems, industrial automation, medical devices, and high-voltage sensing applications.
- What is the maximum supply voltage for the AD8205?
The maximum supply voltage is 12.5 V continuous.
- What is the input impedance of the AD8205?
The differential input impedance is 400 kΩ, and the common-mode input impedance is 200 kΩ.
- Is the AD8205 suitable for high-precision measurements?
