DDC118 Datasheet, PDF (16/30 Pages) Burr-Brown (TI) – Octal Current Input 20-Bit Analog-To-Digital Converter

DDC118
SBAS325A − JUNE 2004 − REVISED JUNE 2005
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
Inputs 1, 2, 5, and 6 (Internal)
A/D Conversion
Inputs 3, 4, 7, and 8 (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 DDC118
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
TINT
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