Open-loop High-precision Linear Current Sensor - AH950

The AH950 series is an open-loop current sensor module based on the Hall effect principle, providing a more economical and precise solution for AC or DC detection. It is widely used in industrial, commercial, and communication systems for AC or DC current detection. This product can be used in motor control, load detection and management, power supplies and DC-DC converters, photovoltaic inverters, UPS, overcurrent protection, and current detection in low and medium power inverters.

The AH950 consists of a high-precision, low-noise, low-temperature-drift linear Hall IC, a magnetic core, and a low insertion resistance (0.12mΩ) current conductor path (located near the mold surface). The external current flowing through this conductor path generates a magnetic field, which the chip converts into a voltage signal output proportional to the input current.

The AH950 output voltage is provided by a low-offset, chopper-stabilized BCDMOS Hall IC. Depending on the current range, the output voltage is precisely calibrated in the factory. When an external current flows through the conduction path (from pin 4 to pin 5), the chip's output has a positive slope (>VOQ). The typical internal resistance of this conduction path is 120μΩ, enabling low power consumption. The terminals of the conduction path (pins 4 and 5) are electrically isolated from the signal pins (pins 1 to 3). This allows the AH950 current sensor module to be used in current sensing applications without the need for other expensive isolation technologies.

All pins of the AH950 series are tin-plated, and the packaging material is lead-free, compliant with RoHS standards.

I.Open-loop High-precision Linear Current Sensor -Features of AH950:

Fast output step response time: 4μs
Single power supply: 4.5～5.5V
120kHz signal bandwidth
Zero hysteresis
Internal conductor resistance: 120μΩ
Output voltage: 2.5V or 50%VCC
Extremely stable quiescent output voltage
Operating temperature: -40℃～150℃
Detection range: ±50A, ±100A, ±150A, ±200A
Safety certifications: (UL Ready)
Dielectric strength: 4800Vrms 1min
Isolation working voltage: 990 VDC or VPK, 680Vrms
Clearance: 5.2mm
Creepage distance: 7.2mm
Package type: CB-2-3 (PFF)

II.Open-loop High-precision Linear Current Sensor -Applications of AH950:

UPS (Uninterruptible Power Supply)

Motor phase and rail current detection

DC power supplies

Overcurrent protection

Current detection in low and medium power inverters

Chargers and converters