DDC232 Datasheet, PDF (18/28 Pages) Burr-Brown (TI) – 32-Channel, Current-Input Analog-to-Digital Converter

DDC232
SBAS331C – AUGUST 2004 – REVISED SEPTEMBER 2006
Non-Continuous Mode
Figure 13 and Figure 14 illustrate operation in non-continuous mode.
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Start Integration Side A
End Integration Side A
Start Integration Side B
End Integration Side B
Wait State
CONV
t_INT
t_INT
A/D Conversion
Odd Channels
A/D Conversion
Even Channels
DVALID
t_ADCONV
t_ADRST
t_ADCONV
Side A Data Ready
t_NCDR1
Start Integration Side A
Release
State
t_NCRL
t_NCIRST
Side B Data Ready
t_NCDR2
Figure 13. Conversion Detail for the Internal Operation of Non-Continuous Mode
with Side A Integrated First
Table 7. DDC232 Internal Timing in Non-Continuous Mode
SYMBOL
t_INT
t_ADCONV
t_ADRST
t_NCIRST
t_NCRL
t_NCDR1
t_NCDR2
DESCRIPTION
Integration Time (non-continuous mode)
A/D Conversion Time (internally controlled)
A/D Conversion Reset Time (internally controlled)
Non-Continuous Mode Integrator Reset Time (internally controlled)
Release Time
1st Non-Continuous Mode Data Ready
2nd Non-Continuous Mode Data Ready
CLK = 5MHz, Clk_4x = 0
MIN
TYP
MAX
TBD
1,000,000
135.6
3.2
TBD
TBD
TBD
TBD
UNITS
µs
µs
µs
µs
µs
Start Integration Side B
End Integration Side B
Start Integration Side A
End Integration Side A
CONV
t_INT
Wait State
t_INT
A/D Conversion
Odd Channels
A/D Conversion
Even Channels
DVALID
t_ADCONV
t_ADRST
t_ADCONV
Side B
Data Ready
Start Integration Side B
Release
State
t_NCRL
t_NCIRST
Side A
Data Ready
Figure 14. Internal Operation Timing Diagram Non-Continuous Mode with Side B Integrated First
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