參數資料
型號: DDC118IRTCR
英文描述: Octal Current Input 20-Bit Analog-To-Digital Converter
中文描述: 八路電流輸入20位模擬數字轉換器
文件頁數: 18/30頁
文件大?。?/td> 384K
代理商: DDC118IRTCR
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SBAS325A JUNE 2004 REVISED JUNE 2005
www.ti.com
18
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
Inputs 1, 2, 5, and 6
A/D Conversion
Inputs 3, 4, 7, and 8
DVALID
Figure 14. Conversion Detail for the Internal Operation of Non-Continuous Mode with Side A Integrated
First
Table 8. Internal Timing for the DDC118 in Non-Continuous Mode
SYMBOL
DESCRIPTION
CLK = 4MHz, CLK_4X = 0
CLK = 4.8MHz, CLK_4X = 0
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
T
INT
t
12
t
13
Integration Time (non-continuous 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 Reset Time (internally controlled)
Release Time
400
1,000,000
320
1,000,000
μ
s
μ
s
μ
s
169.5
4
141.25
3.333
t
15
19.5
16.25
μ
s
t
16
t
17
725.25
±
0.25
604.375
±
0.208
μ
s
μ
s
18
15
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
Inputs 1, 2, 5, and 6
A/D Conversion
Inputs 3, 4, 7, and 8
DVALID
Figure 15. Internal Operation Timing Diagram of Non-Continuous Mode with Side B Integrated First
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