DDC232 Datasheet, PDF(24/28 Page) Burr-Brown (TI) – 32-Channel, Current-Input Analog-to-Digital Converter

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DDC232 Datasheet, PDF (24/28 Pages) Burr-Brown (TI) – 32-Channel, Current-Input Analog-to-Digital Converter

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DDC232

SBAS331C â AUGUST 2004 â REVISED SEPTEMBER 2006

RETRIEVAL BEFORE AND AFTER CONV

TOGGLES (CONTINUOUS MODE)

For the absolute maximum time for data retrieval,

data can be retrieved before and after CONV

toggles. Nearly all of tINT is available for data

retrieval. Figure 22 illustrates how this is done by

combining the two previous methods. Pause the

retrieval during CONV toggling to prevent digital

noise, as discussed previously, and finish before the

next data is ready. The maximum number of

DDC232s that can be daisy-chained together with

FORMAT = 1 is:

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tINT * ÇtSDCV ) tSDCV ) t Ç HDDODV

(20 32)tDCLK

(4)

NOTE: (16 Ã 32)ÏDCLK is used for FORMAT = 0.

For tINT = 400Âµs and DCLK = 10MHz, the maximum

number of DDC232s is 5 (or 7 for

FORMAT = 0).

CONV

DVALID

DCLK

DOUT

tINT

tSDCV

tHDDODV

â¦

Side B

Data

Side A

Data

Figure 22. Readback Before and After CONV Toggles

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