ZMPT101B Single-Phase AC Voltage Sensor Module

ZMPT101B Single-Phase AC Voltage Sensor Module

The ZMPT101B Single-Phase AC Voltage Sensor Module is designed for measuring single-phase AC voltages and transmitting the data as an analog signal to microcontroller systems.

The module features a high-precision ZMPT101B miniature voltage transformer and an LM358 operational amplifier circuit. The AC input voltage is electrically isolated and stepped down by the ZMPT101B transformer; subsequently, an LM358-based signal conditioning circuit scales the signal to an analog level suitable for reading by microcontroller ADC inputs.

The module can be used to measure single-phase voltages up to 250V AC.

The sensor circuit operates within a 5–30V DC supply range, and the amplitude of the analog output signal can be adjusted via the onboard multi-turn trimpot.

Specifications

• Measurement Type: AC voltage
• Maximum Measurement Voltage: 250V AC RMS
• Frequency Range: 50–60Hz
• Supply Voltage: 5–30V DC
• Sensor Element: ZMPT101B precision voltage transformer
• Op-Amp: LM358
• Output Type: Analog
• Analog Output Range: 0–VCC
• Output DC Offset: Approximately VCC/2
• Output Amplitude Adjustment: Adjustable via multi-turn trimpot
• Isolation Withstand Voltage: 4000V
• Measurement Accuracy Class: 0.2
• Linearity: 0.1%
• Rated Input Current: 2mA
• Rated Output Current: 2mA
• Transformer Turns Ratio: 1000:1000
• Rated Load: ≤200Ω
• Transformer DC Coil Resistance: 110Ω @ 20°C