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AM263P4-Q1: Interface Circuits for RDC

Part Number: AM263P4-Q1
Other Parts Discussed in Thread: TIDM-02009, TIDM-02014

Tool/software:

Hi team - A question regarding the RDC. In the TRM, Figure 7-117 has an "Interface Circuits" block between the Resolver and MCU. What are the circuits you would expect there?

I know on some of our reference designs - like TIDM-02009 and TIDM-02014 - we have discrete circuits to convert the differential sin/cos into single-ended signals. Since the AM263P device is meant to be better for working with resolvers, what needs to go into the "Interface Circuits" block? Do we have any reference circuits?

Thanks,

Jacob

  • Hi Jacob,

    It would an Analog Front End, which would convert these Resolver output Sine and Cosine signals from Resolver output voltage levels to RDC-ADC input voltage levels(0 to 3.3V). So, it can be any Single ended or Differential Analog circuitry using Amplifiers or Resistor Divider networks that would keep the Sine and Cosine Voltages between 0 to 3.3V.

    Please refer to Page 2 of "EVT_008E3(001)_Resolver_Sch.pdf" document in schematic files of TIDM-02009. That has reference circuits for doing what I described above.

    Thanks,
    Tejas Kulakarni