Datasheet

DDC112
17
SBAS085B
www.ti.com
CLK = 10MHz CLK = 15MHz
SYMBOL DESCRIPTION MIN TYP MAX MIN TYP MAX UNITS
T
INT
Integration Time (noncontinuous mode) 50 1,000,000 50 1,000,000 µs
t
12
A/D Conversion Time (internally controlled) 202.2 134.8 µs
t
13
A/D Conversion Reset Time (internally controlled) 13.2 8.8 µs
t
15
Integrator and A/D Conversion Reset Time 37.8 25.2 µs
(internally controlled)
t
16
Total A/D Conversion and Rest Time 910.8 607.2 µs
(internally controlled)
t
17
Release Time 24 24 µs
FIGURE 14. Conversion Detail for the Internal Operation of the Non-Continuous Mode with Side A Integrated First.
t
12
T
INT
T
INT
t
16
t
12
t
13
t
15
t
17
Release
State
End Integration Side A
Start Integration Side B
End Integration Side B
Wait State
Side A
Data Ready
Side B
Data Ready
Start Integration Side A
Start Integration Side A
CONV
A/D Conversion
Input 1
A/D Conversion
Input 2
DVALID
t
12
T
INT
T
INT
t
16
t
12
t
13
t
15
t
17
CONV
A/D Conversion
Input 1
A/D Conversion
Input 2
DVALID
Release
State
End Integration Side B
Start Integration Side A
End Integration Side A
Wait State
Side B
Data Ready
Side A
Data Ready
Start Integration Side B
Start Integration Side B
FIGURE 15. Internal Operation Timing Diagram of the Non-Continuous Mode with Side B Integrated First.
TABLE VII. Internal Timing for the DDC112 in the Non-Continuous Mode.