AS38-H39E-S13S

Broadcom Limited's AS38-H39E and AS37-H39B are multi-turn absolute encoder series available with a high-resolution option of 39-bits (23-bit single-turn and 16-bit multi-turn). The AS38-H39E contains a detector opto-ASIC that is accompanied by a high-precision amplifier circuitry coupled with a special multi-track code disk that rotates between the emitter and the detector. The multi-turn encoder does not need a battery as its power is generated by the Wiegand-based energy harvesting technology. When the shaft rotates, the magnet mounted on the shaft moves in tandem. The energy harvesting coil module reacts with the moving magnet field, generating count pulses and energy as a result. The beauty is that the same amount of energy is generated independent of the speed of rotation. The generated energy is sufficient to power the revolution tracking circuitry. Therefore, no miscounts occur even in the absence of an external power supply.

Broadcom AS38-H39E-Sx series encoder is a high-resolution optical absolute encoder that offers 23-bits single-turn and 16-bits multi-turn counts, for a combined 39 bits high resolution. The AS38-H39E series encoder consists of a patterned disk, a light source, and photosensitive elements to translate the mechanical motion into electrical signal.