AD8212S - High Voltage Current Shunt Monitor | Analog Devices
部品番号: AD8212S ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.25 | $22.50 |
| 100 | $2 | $200.00 |
| 500 | $1.8 | $900.00 |
| 1,000 | $1.94 | $1,940.00 |
AD8212S 概要
A current shunt monitor is a specialized amplifier that measures the voltage drop across a sense resistor placed in series with a load, converting this small differential voltage into a proportional output signal. In high-side sensing, the monitor must reject the large common-mode voltage present at the shunt, which can be tens or hundreds of volts above ground. The AD8212S excels in this role, providing accurate current measurement without requiring level shifting or isolation, simplifying the design of motor control, solenoid control, and power management systems.
Key features of the AD8212S include a wide common-mode input range of 4.5 V to 65 V (extendable beyond 500 V with an external PNP), a current output that simplifies interfacing with ADCs or comparators, and a wide operating temperature range of -40°C to +125°C. The device operates from a single 5 V supply and draws a low quiescent current, making it suitable for automotive and industrial environments. Its high common-mode rejection ensures accurate current sensing even in noisy power systems.
The AD8212S uses a precision bipolar process to achieve low offset and gain drift over temperature. The current output can be converted to a voltage with an external resistor, allowing flexible scaling. The device is available in a compact SOIC-8 package, which is pin-compatible with the standard AD8212, and is specified for operation over the extended temperature range, making it suitable for harsh environments.
Typical applications include high-side current sensing in motor control, solenoid control, battery monitoring, and power supply monitoring. The device is also used in automotive systems for load detection and diagnostics. Its ability to handle high common-mode voltages with minimal external components makes it a preferred choice for robust current sensing.
When designing with the AD8212S, ensure the supply voltage is within the specified range and the output resistor is chosen to keep the output voltage within the ADC's input range. The external PNP transistor, if used, must be selected to handle the required common-mode voltage and current.
ドロップイン代替品: AD8212S — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
AD8212
✅ ドロップイン📋 参考代替品（カタログ未掲載）
AD8210
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
AD8212S 最大定格＆電気的特性
| Common-Mode Voltage Range | 4.5 V to 65 V |
| Common-Mode Voltage with External PNP | >500 V |
| 電源電圧 | 5 V |
| 出力タイプ | Current |
| 動作温度範囲 | -40°C to +125°C |
| パッケージ | SOIC-8 |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
AD8212S ピン構成
| ピン 1 | IOUT — Current output |
| ピン 2 | GND — Ground |
| ピン 3 | -IN — Inverting input |
| ピン 4 | +IN — Non-inverting input |
| ピン 5 | VS — Supply voltage |
| ピン 6 | NC — No connect |
| ピン 7 | NC — No connect |
| ピン 8 | NC — No connect |
主な用途
AD8212S の用途: 6 件s: Motor Control, Solenoid Control, Battery Monitoring, Power Supply Monitoring, Automotive Load Detection, Industrial Process Control.
Motor Control
The AD8212S is ideal for high-side current sensing in motor control applications. Its wide common-mode voltage range of up to 65 V (or >500 V with an external PNP) allows direct connection to motor supply rails. The current output can be easily converted to a voltage for ADC input, enabling precise torque and speed control. The device's high common-mode rejection ensures accurate measurement even with noisy motor currents, and its extended temperature range (-40°C to +125°C) suits industrial and automotive environments.
おすすめ
Solenoid Control
In solenoid control systems, the AD8212S monitors the current through the solenoid to detect faults and ensure proper operation. Its high common-mode voltage capability allows sensing on the high side of the solenoid, simplifying the circuit. The current output can be compared to a threshold to detect open or short circuits. The device's wide temperature range and robust design make it suitable for automotive and industrial solenoid drivers.
おすすめ
Battery Monitoring
The AD8212S is used in battery monitoring systems to measure charge and discharge currents. Its ability to handle common-mode voltages up to 65 V makes it suitable for monitoring individual cells or entire battery packs. The current output can be integrated over time to estimate state of charge. The device's low quiescent current and high accuracy contribute to efficient battery management in electric vehicles and portable devices.
おすすめ
Power Supply Monitoring
In power supply monitoring, the AD8212S measures the output current of a power supply to detect overloads and ensure proper regulation. Its high common-mode voltage range allows sensing on the output rail, which may be significantly above ground. The current output can be fed to an ADC or comparator for monitoring and protection. The device's accuracy and temperature stability ensure reliable operation in various power supply designs.
おすすめ
Automotive Load Detection
The AD8212S is used in automotive systems to detect and monitor loads such as lights, heaters, and motors. Its extended temperature range (-40°C to +125°C) and high common-mode voltage capability make it suitable for under-hood applications. The current output can be used to detect open or short circuits, enabling diagnostics. The device's small SOIC-8 package and low component count simplify integration into automotive electronic control units.
おすすめ
Industrial Process Control
In industrial process control, the AD8212S monitors currents in actuators, valves, and other equipment. Its high common-mode voltage range and accuracy enable precise current measurement in harsh industrial environments. The current output can be transmitted over long distances without significant loss, making it suitable for remote monitoring. The device's wide temperature range and reliability ensure continuous operation in demanding applications.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AD8212S — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | AD8212 | AD8210 | AD8211 |
|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOT-23-5 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Common-Mode Voltage Range | 4.5 V to 65 V | 4.5 V to 65 V | 2 V to 65 V | 2 V to 65 V |
| Output Type | Current | Current | Voltage | Voltage |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | -40°C to +125°C | -40°C to +125°C |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V |
主な差別化要因
- Extended temperature range （vs AD8212)
- High common-mode voltage capability （vs AD8211)
- Current output simplifies interfacing （vs AD8210)
設計ノート
Place the sense resistor close to the AD8212S inputs to minimize parasitic inductance and resistance. Use Kelvin connections to the shunt to ensure accurate voltage sensing. Keep the input traces short and shielded from noisy power traces to maintain high common-mode rejection.
The AD8212S operates from a 5 V supply. Ensure the supply is well decoupled with a 0.1 uF ceramic capacitor placed close to the VS pin. The supply current is low, but proper decoupling prevents noise from affecting the measurement accuracy.
When using an external PNP transistor to extend the common-mode voltage beyond 65 V, ensure the transistor's breakdown voltage exceeds the maximum common-mode voltage. Also, verify that the transistor's base current does not affect the measurement accuracy. Refer to the datasheet for the recommended transistor configuration.
コンプライアンス情報
RoHS compliant per Analog Devices product page. Other compliance data not specified in the provided data.
