NJU9102

Features

• Power Supply VDD (4.0V to 5.5V)
• Operating Temperature (-40°C to 105°C)
• Built-in High Precision ADC (14-Bit)
• Sinc3 Digital Filter (-3dB Frequency = 150Hz)
• Internal Power Supply (
  V_REG=3.3V
  V_COM=1.65V)
• Earth Leakage Detector Condition (TMD)
  (Type A / Type AC switchable)
• Five times trip level detection (
  NJU9102: Immediate response
  NJU9102A: No immediate response)
• Control Circuit (
  Earth Leakage Detector Condition (TMD)
  Sampling Counter (SCRT))
• Package (DMP8)

General Description

NJU9102/A is a digital detector IC for earth leakage current breaker. The built-in ADC converts from an analog signal from ZCT (Zero-phase-sequence Current Transformer) to digital data, and processes digital data based on an earth leakage current detector condition. As a result of data processing, NJU9102/A outputs a one-shot pulse on SCRT terminal when an analog signal is judged to a leakage condition, and turns on an external thyristor.