Skyworks Solutions Inc 電流シャントモニタ, 3 → 5.5 V, 差動出力, 8-Pin DIP

The Si8920 is a galvanically isolated analogue amplifier. Their low voltage and differential input is ideal for measuring voltage across a current shunt resistor or for any place where a sensor must be isolated from the control system.

Output is a differential analogue signal amplified by either 8.1x or 16.2x. The very low signal delay allows control systems to respond quickly to fault conditions or changes in load. Low offset and gain drift ensure that accuracy is maintained over the entire operating temperature range.

High common mode transient immunity means that the Si8920 will deliver accurate measurements even in the presence of high power switching like would be found in a motor drive system or inverter.

To help evaluate the Si8920 there is a dedicated development kit available - SI8920ISO-KIT (RS 9026806). It is populated with the Si8920BC-IP and enables quick connection to a shunt resistor.

Si8920には、次の4つのタイプがあります。
Si8920AC-IP (RS 901-3967): 入力範囲が±100 mVで、ガルウィングDIP-8パッケージに収容
Si8920BC-IP (RS 901-3976): 入力範囲が±200 mVで、ガルウィングDIP-8パッケージに収容
Si8920AD-IS (RS 901-3979): 入力範囲が±100 mVで、SOIC-16パッケージに収容
Si8920BD-IS (RS 901-3973): 入力範囲が±200 mVで、SOIC-16パッケージに収容

電流検出アンプは、一般的に高電流出力をサポートする電力レールにおいて、抵抗値の非常に低い抵抗器にかかる電圧の低下に比例する電圧出力を有します。 そのため、その電力レールにおける電流の流れを測定します。