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Old 30th June 2007, 01:32 PM   #1
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Default Need help about AD1853 DAC.

I want to build a DAC with CS8414 and AD1853,
but i don't know how many PF C52* and C53*
(remarked in the picture below) should be .
Can some one tell me?
I want to use OPA2604 instead of OP275.
Thanks!!!!
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Old 30th June 2007, 01:46 PM   #2
banana is offline banana  Hong Kong
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this is common abbreviation for lazy engineers.
NU = Not Used
NC = Not Connected
NP = Not Populated

They all means the same, and in this case, the cap should be 0pF.
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Old 30th June 2007, 01:57 PM   #3
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Could also mean non-polarized, but it doesn't seem to be so in this schematic. They are using symbols to indicate polarity.
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Old 30th June 2007, 02:06 PM   #4
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Thanks.
Why C57 NP0 is 220PF?
What dose NP0 mean?
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Old 30th June 2007, 03:18 PM   #5
ALP is offline ALP  Russian Federation
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Some operational amplifiers don`t like ultrasound signals on input. This capacitors is simply filter for it. Value may be 100-4700 pF range. Use high speed opamp, then this capacitors not needed. Looks like AD812.

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Old 30th June 2007, 03:28 PM   #6
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OH,I see.
THANK YOU SO MUCH!
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Old 13th July 2007, 07:24 AM   #7
Marek is offline Marek  Poland
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I've made DAC on AD1853 (PCM2702-DIR1703-AD1896-AD1853) with the same output stage suggested by Analog. I used OPA627 for I/V and AD797 for filter with great results.
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Old 13th July 2007, 08:46 AM   #8
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marek, could you post the schematic,please?
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