no RC network shown in datasheet for LDAC pin permanently low.Please show the right fig in Fig 19(as mentioned for LDAC pin in page 4).Please reply the RC configuration required in LDAC pin permanently low.
You may want to check out the AD5546/AD5556. It can be used in parallel mode similar to the AD7840.
This is being reviewed internally. We will get back to you soon.
The part is quite old but looking at the data sheet (Figure 25) I would recommend 68pF and 15k ohm. This RC combination is commonly used as a pull-up resistor and a capacitor to ground. May I ask if the part is to be used in a new design? If ever, we could recommend new parts for your application.
How about if the LDAC pin kept permanently low(grounded)?In that case I guess RC is not required for even power up ..I want to use the device in parallel mode..
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