Open-Loop Hall Effect Current Transducers with Digital Outputs

LEM announces digital output versions of HO and HLSR open-loop Hall effect current transducers with analog to digital (A/D) conversion performed by an on-board sigma-delta modulator, giving a 1-bit serial bitstream output. These new components for nominal current measurements of 10, 32, 50, 80, 100, 120, 150, 200, 250 ARMS in 3 different mechanical designs (PCB and panel mounting) provide up to 12 bit resolution with 20 kHz bandwidth. The single-bit output minimizes the connections required, enabling highly compact transducers, and the digital output allows the user to choose the filter used on the bitstream to optimize between resolution and response time, according to the application. Digital outputs are also intrinsically immune to noise in hostile environments.

For a typical transfer function the average bitstream density is 50% for zero primary current, and 10% or 90% for maximum currents in the negative or positive directions.

About LEM

LEM is a mid-size, global company with production plants in Geneva (Switzerland), Sofia (Bulgaria), Beijing (China) and Machida (Japan). With its regional sales offices close to its clients’ locations, the company offers seamless service around the globe.

Listed on the SIX Swiss Exchange since 1986, the company’s ticker symbol is LEHN.