Chip - AC4755 chip: Inductive robot joint dedicated integrated encoder chip (485 interface)
AC4755 is a specialized chip for inductive absolute position encoders optimized specifically for robotics and industrial automation applications. It integrates the transmission and reception analog front-end, ADC, and dedicated digital signal processing functions required for dual channel inductive position sensors on a single chip. It has rich application interfaces, supports UART interface protocol, and, combined with optimized sensing coils, can achieve 17-23 bit encoders.
The signal frequency can reach 10kHz, supporting 64 pairs of pole sensors to work at high speed of 6000rpm
Multi level programmable excitation frequency: 2MHz-6MHz
Integrated sine and cosine coil receiving, demodulation, digital encoding, and calibration dedicated circuits
Automatic gain control, tolerance encoder, air gap fluctuation between rotor and stator
Integrate multiple functions:Compensation for independent channel misalignment and gain adaptationEMI filtering anti-interferenceCoil detection, etcSupport battery powered multi turn counting
Specialized DSP circuit:Angle calibration of adaptive motor speed, with an absolute accuracy of 0.01 °Low latency angle noise filteringAbsolute position encodingSupports UART communication protocol
Realize high encoding accuracy of 17-23 bits
Multi cycle counting can reach up to 23 digits
QFN40 package, 5mm * 5mm
