DDC114IRTCT Datasheet, PDF (16/35 Pages) Texas Instruments – Quad Current Input, 20-Bit Analog-To-Digital Converter

DDC114
SBAS255C − JUNE 2004 − REVISED APRIL 2009
www.ti.com
End Integration Side A
Start Integration Side B
End Integration Side B
Start Integration Side A
End Integration Side A
Start Integration Side B
CONV
A/D Conversion
Input 1 and 2 (Internal)
A/D Conversion
Input 3 and 4 (Internal)
DVALID
T_INT
Side A
t₁₂
t₁₃
Side A
t₁₂
T_INT
Side B
t₁₄
Side A
t₁₃
Side B
t₁₄
Side A
Data Ready
Side B
Data Ready
Figure 12. Timing Diagram of the Internal Operation in Continuous Mode of the DDC114
Table 7. Timing for the Internal Operation in Continuous Mode
CLK = 4MHz, CLK_4X = 0
CLK = 4.8MHz, CLK_4X = 0
SYMBOL DESCRIPTION
MIN
TYP
MAX
MIN
TYP
MAX UNITS
T_INT
t₁₂
t₁₃
t₁₄
Integration Period (continuous mode)
A/D Conversion Time (internally controlled)
A/D Conversion Reset Time (internally controlled)
Integrator and A/D Conversion Reset Time
(internally controlled)
400
1,000,000
320
1,000,000 µs
169.5
4
141.25
µs
3.333
µs
23
19.167
µs
16