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參數(shù)資料
| 型號： | EM6415V1SS36A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Sensor Signal conditional Circuit with 14 bit A/D Converter |
| 中文描述： | 有條件的傳感器信號電路的14位A / D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 200K |
| 代理商： | EM6415V1SS36A |
EM6415
Copyright
2002, EM Microelectronic-Marin SA
9
www.emmicroelectronic.com
Integrator
This signal can be seen on pin CINT
t1
t2
t3
A
A
D
D
min. 1.5V for 14Bit at
3V power supply
OFFSET ROUGH ADJUST
FS ROUGH ADJUST
A
D
FS FINE ADJUST
14Bit ADC OUTPUT
12Bit
8Bit
8Bit
0.720V
dV1
d
Fig. 5 Integrator ramp
Time
t1
t 2
t 3
Phase
Autozero phase
FS fine adjust
FS rough adjust
Execution
Set up of integrator starting point
Signal integration with preprogrammed counter time length t2
De-integration with preprogrammed reference voltage, time length of
t3 = ADC output counts
dV1 is the Offset Rough Adjust
dV2 is the Integrator Ramp Length
Offsets and other system mismatch such as the zero drift of operational amplifiers, long term instabilities or supply
voltage fluctuations are cancelled during the Autozero phase.
Sensitivity and full-scale range adjustments are done during rampup and rampdown of the dual slope integrator.
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