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Optical Encoder
The optical encoder signal chain components are almost identical to those
described in the Magnetic Encoder (AMR) section. However, to support
higher encoder resolutions, the AD7760 2.5 MSPS, 24-bit, 100 dB sigma-
delta (Σ-Δ) ADC is recommended. It combines wide input bandwidth and
high speed with the benefits of sigma-delta conversion to achieve a
performance of 100 dB SNR at 2.5 MSPS, making it ideal for high speed data
acquisition.
Table 5: Optical Encoder Signal Chain Recommended
Components
Component Recommended Part Numbers
MEMS Accelerometer ADXL371, ADXL372, ADXL314, ADXL375
Temperature Sensor ADT7320
Power (LDO) ADP320, LT3023, LT3029
ADC, 12-Bit, 16-Bit, 24-Bit MAX11198, AD7380, AD7866, AD7760
Precision Op Amp ADA4622-4
Dual Comparator LTC6702
Transceiver (RS-485, RS-422)
MAX22506E, ADM3066E, ADM4168E,
MAX22500E
Microcontroller, Integrated ADC MAX32672, MAX32662
Figure 9: Optical encoder signal chain.
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