Chip - AC4501 Chip: Integrated Encoder Chip for Servo Motors (485 Interface)
AC4501 is a specialized chip for inductive absolute position encoders optimized specifically for servo motor 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 supports the 485 interface protocol and, combined with optimized sensing coils, can achieve 17-23 bit encoders.
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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, adaptive encoder with air gap fluctuation between rotor and stator
Integrate multiple functions:Compensation for independent channel misalignment and gain adaptationEMI filtering anti-interferenceCoil detection, etc
Specialized DSP circuit:Angle calibration of adaptive motor speedLow latency angle noise filteringSupport incremental/absolute position encodingSupports RS485/Tamagawa protocol
Realize high encoding accuracy of 17-23 bits
QFN40 package, 5mm × 5mm
