Overview
The AD8212WYRMZ, produced by Analog Devices Inc., is a high common-mode voltage current shunt monitor. This device is designed to accurately amplify small differential input voltages in the presence of large common-mode voltages, making it ideal for current monitoring across shunt resistors in various applications such as controlling loads like motors and solenoids. The AD8212 features an integrated regulator and output current compensation, allowing for high voltage operation and maintaining excellent output current accuracy even with external high voltage breakdown PNP transistors.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage (V+) | 7 V to 65 V | |
| Common-Mode Voltage Range | 7 V to 65 V (up to 500 V with external PNP transistor) | |
| Bias Current (IBIAS) | 185 µA to 200 µA (normal operation), 200 µA to 1000 µA (high voltage operation) | TOPR, 7 V ≤ V+ ≤ 65 V |
| Small Signal -3 dB Bandwidth | 1000 kHz (Gain = 10), 500 kHz (Gain = 20), 100 kHz (Gain = 50) | |
| Settling Time | 2 µs (within 0.1% of true output, Gain = 20) | |
| Temperature Range | -40°C to +125°C | For specified performance |
| Package Type | MSOP-8 |
Key Features
- High common-mode voltage operation up to 65 V and extendable to 500 V with an external PNP transistor.
- Integrated regulator maintaining a constant 5 V between the supply terminal and the COM pin.
- Output current compensation for high accuracy with any PNP transistor.
- Adjustable gain via an external resistor.
- Low noise and high PSRR (Power Supply Rejection Ratio) of 80 dB.
- Compact MSOP-8 package.
Applications
- Current monitoring across shunt resistors in motor and solenoid control systems.
- Battery monitoring and remote sensing applications.
- High voltage industrial control systems.
- Automotive systems requiring high common-mode voltage operation.
Q & A
- What is the primary function of the AD8212WYRMZ?
The AD8212WYRMZ is a high common-mode voltage current shunt monitor designed to accurately amplify small differential input voltages in the presence of large common-mode voltages.
- What is the typical common-mode voltage range of the AD8212WYRMZ?
The typical common-mode voltage range is 7 V to 65 V, extendable to 500 V with an external PNP transistor.
- How does the AD8212WYRMZ achieve high voltage operation?
High voltage operation is achieved by using an external high voltage breakdown PNP transistor along with the integrated regulator and output current compensation of the AD8212WYRMZ.
- What is the purpose of the integrated regulator in the AD8212WYRMZ?
The integrated regulator maintains a constant 5 V between the supply terminal and the COM pin, ensuring stable operation.
- How can the gain of the AD8212WYRMZ be adjusted?
The gain can be adjusted by using an external resistor, the value of which is dependent on the desired gain equation.
- What are some common applications of the AD8212WYRMZ?
Common applications include current monitoring in motor and solenoid control systems, battery monitoring, remote sensing, and high voltage industrial control systems.
- What is the temperature range for specified performance of the AD8212WYRMZ?
The temperature range for specified performance is -40°C to +125°C.
- What package type is the AD8212WYRMZ available in?
The AD8212WYRMZ is available in an MSOP-8 package.
- How does the AD8212WYRMZ handle noise and PSRR?
The AD8212WYRMZ has low noise characteristics and a high PSRR of 80 dB.
- Can the AD8212WYRMZ be used in automotive systems?
Yes, the AD8212WYRMZ can be used in automotive systems due to its high common-mode voltage operation and robust performance.
