Overview
The AD8212WYRMZ-RL, 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. The AD8212 features an integrated 5 V series regulator, which maintains a constant voltage between the supply terminal and the common point of the internal circuitry, ensuring reliable operation over a wide range of supply voltages.
Key Specifications
| Parameter | Value |
|---|---|
| Common-Mode Voltage Range | 7 V to 65 V (up to 500 V with external PNP transistor) |
| Supply Voltage Range | 7 V to 65 V |
| Output Current Accuracy | High accuracy with output current compensation |
| Bias Current (IBIAS) | 185 µA to 200 µA (normal operation), up to 1000 µA (high voltage operation) |
| Temperature Range | −40°C to +125°C |
| Package Type | 8-Lead MSOP |
| Bandwidth (Small Signal, -3 dB) | 1000 kHz (Gain = 10), 500 kHz (Gain = 20), 100 kHz (Gain = 50) |
| Settling Time | Within 0.1% of true output: 2 µs (Gain = 20) |
| Noise (RTI) | 1.1 µV p-p (0.1 Hz to 10 Hz), 40 nV/√Hz (at 1 kHz) |
Key Features
- Accurately amplifies small differential input voltages in the presence of large common-mode voltages.
- Integrated 5 V series regulator for stable operation.
- High voltage operation up to 500 V using an external high voltage breakdown PNP transistor.
- Output current compensation for high accuracy.
- User-selectable gain via external resistor.
- Low component count for increased reliability.
Applications
- Current monitoring across shunt resistors in various loads such as motors and solenoids.
- Battery monitoring and remote sensing.
- Industrial control systems requiring accurate current measurement.
Q & A
- What is the common-mode voltage range of the AD8212? The AD8212 has a common-mode voltage range of 7 V to 65 V, extendable to up to 500 V with an external PNP transistor.
- How does the AD8212 achieve high voltage operation? High voltage operation is achieved by using an external high voltage breakdown PNP transistor.
- What is the purpose of the integrated 5 V series regulator in the AD8212? The integrated 5 V series regulator maintains a constant 5 V between the supply terminal and the common point of the internal circuitry.
- How is the output current accuracy maintained in the AD8212? The AD8212 features output current compensation, allowing for high accuracy even with inexpensive PNP transistors.
- What is the temperature range for specified performance of the AD8212? The AD8212 operates within a temperature range of −40°C to +125°C.
- What package types are available for the AD8212? The AD8212 is available in an 8-Lead MSOP package.
- How does the user set the desired gain in the AD8212? The user can set the desired gain by selecting an appropriate external resistor.
- What are some typical applications of the AD8212? Typical applications include current monitoring across shunt resistors, battery monitoring, and remote sensing.
- What is the bandwidth of the AD8212 at different gains? The bandwidth is 1000 kHz at a gain of 10, 500 kHz at a gain of 20, and 100 kHz at a gain of 50.
- What is the settling time of the AD8212? The settling time within 0.1% of the true output is 2 µs at a gain of 20.
