AD7875 CS to RD setup time (Mode 2)

Hi all,

In the datasheet at AD7875,
"TIMING CHARACTERISTICS",
It is t15 : 60 ns (min) ; CS to RD setup time (Mode 2).

Is it correct ?
This is the latch time (output format setup time) from Serial register to Parallel output register ?

We know the other general devices are 0 ns (min) ; CS to RD setup time.

Best regards,
sss

Parents
  • Michael -san,

    Our customer will run the mode 2, parallel interface.
    They want to control /CS and /RD signal at same time.
    The "60ns" setup time is necessary?

    AD7875
    t15: 60 ns min CS to RD setup time (Mode 2)
    t18: 0 ns min CS to RD hold time (Mode 2)

    ex.
    Following is the parallel interface ADC, they know it.
    AD7854
    t5: 0 ns min CS to RD to Setup Time
    t6: 0 ns min CS to RD Hold Time

    AD7938-6
    t10: 0 ns min CS to RD setup time.
    t11: 0 ns min CS to RD hold time.

    Best regards,
    sss

Reply
  • Michael -san,

    Our customer will run the mode 2, parallel interface.
    They want to control /CS and /RD signal at same time.
    The "60ns" setup time is necessary?

    AD7875
    t15: 60 ns min CS to RD setup time (Mode 2)
    t18: 0 ns min CS to RD hold time (Mode 2)

    ex.
    Following is the parallel interface ADC, they know it.
    AD7854
    t5: 0 ns min CS to RD to Setup Time
    t6: 0 ns min CS to RD Hold Time

    AD7938-6
    t10: 0 ns min CS to RD setup time.
    t11: 0 ns min CS to RD hold time.

    Best regards,
    sss

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