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AD7606-4: /CS control and data format

Thread Summary

The user inquires about the AD7606-4's /CS pin control and data output timing. The support engineer confirms that a new four-channel data set can be acquired by asserting a pulse on the CONVST(A/B) pin after reading the previous data, which requires 32 SCLK cycles when using two output ports (DoutA and DoutB).
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Category: Datasheet/Specs
Product Number: AD7606-4

Hello,

I have a question about the control of the /CS pin for the AD7606-4.
The AD7606-4 outputs sampled data from the DoutA and DoutB pins.
When the /CS is asserted after the BUSY is de-asserted and remains for 64 SCLK clocks, it outputs 4 channels of data from DoutA and DoutB.
The data formats are as follows:
 DoutA: V1 – V2 – V4 – V3
 DoutB: V3 – V4 – V2 – V1

When two output ports are used, four channels of data are obtained by closing the /CS at 32 clocks.
Can he then get new four-channel data by inputting a pulse to the CONVST(A/B)?
I think so, but I could not find a description of this in the datasheet.

Best regards,

y_suzuki

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  • Hi Y_suzuki,

         First of all, apologize for late response.

         The AD7606-4 is a 4-channel part in the AD7606 family of generics. Conversion is initiated by the CONVSTA and CONVSTB pins, when these pins are connected together, and a rising edge is initiated, it simultaneously samples all 4 channels on AD7606-4. 

         You are correct, it requires 32 SCLK cycles to clock out the conversion in two Dout channel, DoutA and DoutB. Dout A clocks out V1-V2 and DourB clocks out V3 and V4. As shown in figure 46 of datasheet.

          Once all channels were read, CS can go high, and new conversion cycle can be initiated by performing acquisition and sampling mode again via CONVST(A/B) pin. You are right, a new four data can be acquired when rising edge of CONVST happens.

    Regards,

    Jonathan

         

         

  • Hello Jonathan,

    Thank you for your reply.
    I shall respond to the customer based on the information you have provided.

    Regards,

    ysuzuki

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