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DAC7811: dac7811 has no output

Amy Luo
Expert 6895 points
Part Number: DAC7811
Other Parts Discussed in Thread: REF5025, OPA277

Hello Team,

The customer has questions about dac7811.

The SCLK is 25 MHz. When DAC7811 is driven by FPGA, the timing diagram is as follows:

Circuit is Figure 30 in the dac7811 datasheet. The OPA277 is powered by dual power supply. Vref input voltage is generated by REF5025.

The dac7811 has no output. Any suggestions?

  • 0
    TI__Genius 14220 points

    Hi Amy,

    Thank you for your query. I don't see any problem in the waveform. The root cause of the problem might have to do with some miswiring or some power supply not coming properly to the devices. Could you please confirm all the connections and power supplies?

    Regards,

    Uttam Sahu

    Applications Engineer, Precision DACs