New Yorker Electronics has released the new SSA Smart Current Sensor series from Riedon. Riedon’s new Smart Shunt SSA combines low-impedance manganese shunt resistance, a high-precision insulated amplifier, and an isolated DC/DC converter.
Riedon’s SSA family of Isolated Smart Current Measurement Technology consists of four current ratings: 100A, 250A, 500A and 1000A. This makes them suitable for use in high-power applications, where harsh conditions may be an issue, such as elevated temperature levels, heavy vibrations and electromagnetic interference (EMI).
They are therefore ideal for use in electric vehicle (EV) and hybrid-electric vehicle (HEV) traction inverters, AC/DC converters, uninterruptible power supplies, renewable energy generation sites and smart grid infrastructure.
The new SSA devices feature 1500 VDC/1000 VAC RMS reinforced isolation, ± 0.1% initial sensing accuracy, ± 0.1% linearity over a current range, unipolar power supply, and differential analog output and 300 kHz bandwidth.
The series offers a differential output and can be connected directly to most microcontrollers (MCUs). According to Riedon, it is currently the industry’s only amplifying active shunt with an analog output.
Since the SSA contains an amplifier, the resistance value is extremely low, because the detected voltage is multiplied internally. Therefore, the power dissipation for measuring currents up to 1000 A is in the range of 5 to 20 W.
The robust module includes an AEC-Q100 certified insulated amplifier from Texas Instruments and is therefore also suitable for the strict automotive applications that must cover the extended operating temperature range from -40 to 125 °C.
The insulated amplifier offers a differential output with many advantages. If a single-ended signal is required, this can be provided with a simple operational amplifier circuit (OPV). The differential output of the isolated amplifier is often converted into a single-ended analog output with an OPV-based circuit.
This circuit can also implement a low-pass filter to further reduce the signal bandwidth to the desired bandwidth, thereby improving the noise performance of the system.
Features & Benefits:
- 100A to 1000A
- 1500VDC Reinforced Isolation
- Amplified Output
- 1% Tolerance
- Compared to Hall Effect Technology:
- Superior Overall Current Measurement Accuracy
- Unipolar Power Supply
- Lower Temperature Drift
- No Periodic Calibration
- Higher operating temperature range
- Battery Systems
- UPS systems
- Motor Drives
- Frequency In