AC/DC Open Loop Hall Current Sensor IC CYHCS91X

AC/DC Open Loop Hall Current Sensor IC CYHCS91X

Nominal Input Current:

The CYHCS91X is a high performance single-ended linear current sensor that can effectively... more
AC/DC Open Loop Hall Current Sensor IC CYHCS91X

The CYHCS91X is a high performance single-ended linear current sensor that can effectively measure AC or DC currents in a wide range of industrial, consumer and communication applications. The CYHCS91X series incorporates a high precision, low noise linear Hall circuit and a low impedance main current loop lead. When the input current flows through the main current circuit, the resulting magnetic field induces a corresponding electrical signal on the Hall IC, which is then output as a voltage signal through the signal processing circuit, making the sensor output signal proportional to the measured current value. The linear Hall circuit is manufactured using the advanced BCDMOS process and comprises a high sensitivity Hall sensor, Hall signal preamplifier, high accuracy Hall temperature compensation unit, oscillator, dynamic detuning circuit and amplifier output module. In the absence of a magnetic field, the static output of the current sensor is 2.5V fixed or 50% VCC. With a supply voltage of 5V, the sensor output can vary linearly with the magnetic field from 0.2 to 4.8V with a linearity of up to 0.4% The CYHCS91X has an integrated dynamic detuning circuit that makes the sensitivity of the sensor unaffected by external pressure and stress on the IC package. The CYHCS91X is available in a SOP8 package with an operating temperature range of -40 to 125°C and is RoHS compliant.


  • Static output bias voltage of 2.5V or 50% VCC
  • Measurement range 10A / 20A / 30A / 40A
  • Isolation voltage 1200VDC
  • High frequency bandwidth: 65kHz
  • Output response time: 4µs (typical)
  • Temperature range -40°C to 125°C
  • Stability over operating range: 1 .6% @25°C~125°C, 2.5% @ -40°C~25°C
  • Low noise analog signal; high immunity to interference
  • High resistance to mechanical stress, magnetic field parameters are not shifted by external pressure,
  • ESD (HBM) 5kV
  • ROSH approved: (EU) 2015 / 863


  • Electric Vehicles
  • Inverter current detection
  • Motor phase current detection (motor control)
  • Photovoltaic inverters
  • Battery load detection systems
  • Current transformers
  • Switching power supplies
  • Overload protection devices
  • Inverter speed control equipment
  • Uninterruptible Power Supplies (UPS)
  • Electrolytic and plating equipment
  • Various power supplies
Nominal Input Current: 0-10A, 0-20A, 0-30A, 0-40A
Sensor Type: Open-Loop
Power Supply: +5 V DC
Output Signal: 200mV/A-40mV/A
Current Type: AC/DC
Window Type: No Window, PCB Mounted
Direction: bidirectional
Accuracy: 3.0%
Linearity: 0.4%
Operating Temperature: -40°C ~ +125°C