DDC112_15 Datasheet, PDF (17/34 Pages) Texas Instruments – Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER

Start Integration Side A
End Integration Side A
Start Integration Side B
End Integration Side B
Wait State
CONV
T_INT
T_INT
t₁₆
A/D Conversion
Input 1
t₁₂
A/D Conversion
Input 2
DVALID
t₁₂
t₁₃
t₁₅
Side A
Data Ready
Start Integration Side A
Release
State
t₁₇
Side B
Data Ready
FIGURE 14. Conversion Detail for the Internal Operation of the Non-Continuous Mode with Side A Integrated First.
SYMBOL
T_INT
t₁₂
t₁₃
t₁₅
t₁₆
t₁₇
DESCRIPTION
Integration Time (noncontinuous mode)
A/D Conversion Time (internally controlled)
A/D Conversion Reset Time (internally controlled)
Integrator and A/D Conversion Reset Time
(internally controlled)
Total A/D Conversion and Rest Time
(internally controlled)
Release Time
CLK = 10MHz
MIN
TYP
MAX
50
1,000,000
202.2
13.2
37.8
910.8
24
TABLE VII. Internal Timing for the DDC112 in the Non-Continuous Mode.
CLK = 15MHz
MIN
TYP
MAX
50
1,000,000
134.8
8.8
25.2
607.2
24
UNITS
µs
µs
µs
µs
µs
µs
Start Integration Side B
End Integration Side B
Start Integration Side A
End Integration Side A
Wait State
CONV
A/D Conversion
Input 1
A/D Conversion
Input 2
DVALID
T_INT
T_INT
t₁₂
t₁₃
t₁₆
t₁₂
t₁₅
Side B
Data Ready
Start Integration Side B
Release
State
t₁₇
Side A
Data Ready
FIGURE 15. Internal Operation Timing Diagram of the Non-Continuous Mode with Side B Integrated First.
DDC112
17
SBAS085B
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