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LTC2435-1IGN датащи(PDF) 17 Page - Linear Technology |
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LTC2435-1IGN датащи(HTML) 17 Page - Linear Technology |
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17 / 40 page ![]() LTC2435/LTC2435-1 17 24351fa APPLICATIO S I FOR ATIO Table 3a. LTC2435 State Duration State Operating Mode Duration CONVERT Internal Oscillator FO = LOW, (60Hz Rejection) 67ms, Output Data Rate ≤ 15 Readings/s FO = HIGH, (50Hz Rejection) 80ms, Output Data Rate ≤ 12.4 Readings/s External Oscillator FO = External Oscillator with Frequency 10278/fEOSCs, Output Data Rate ≤ fEOSC/10278 Readings/s fEOSC kHz (fEOSC/2560 Rejection) SLEEP As Long As CS = HIGH DATA OUTPUT Internal Serial Clock FO = LOW/HIGH, (Internal Oscillator) As Long As CS = LOW But Not Longer Than 1.25ms (24 SCK cycles) FO = External Oscillator with As Long As CS = LOW But Not Longer Than 192/fEOSCms (24 SCK cycles) Frequency fEOSC kHz External Serial Clock with Frequency fSCK kHz As Long As CS = LOW But Not Longer Than 24/fSCKms (24 SCK cycles) INPUT FREQUENCY DEVIATION FROM NOTCH FREQUENCY (%) –12 –8 –4 048 12 2435 F07a –60 –70 –80 –90 –100 –110 –120 –130 –140 Table 3b. LTC2435-1 State Duration State Operating Mode Duration CONVERT Internal Oscillator FO = LOW 73ms, Output Data Rate ≤ 14 Readings/s Simultaneous 50Hz/60Hz Rejection External Oscillator FO = External Oscillator with Frequency 10278/fEOSCs, Output Data Rate ≤ fEOSC/10278 Readings/s fEOSC kHz (fEOSC/2560 Rejection) SLEEP As Long As CS = HIGH DATA OUTPUT Internal Serial Clock FO = LOW (Internal Oscillator) As Long As CS = LOW But Not Longer Than 1.4ms (24 SCK cycles) FO = External Oscillator with As Long As CS = LOW But Not Longer Than 192/fEOSCms (24 SCK cycles) Frequency fEOSC kHz External Serial Clock with Frequency fSCK kHz As Long As CS = LOW But Not Longer Than 24/fSCKms (24 SCK cycles) Figure 7c. LTC2435/LTC2435-1 Normal Mode Rejection When Using an External Oscillator of Frequency fEOSC with Running Averages Figure 7b. LTC2435-1 Normal Mode Rejection When Using an Internal Oscillator with Running Averages 48 50 52 54 56 58 60 62 DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz) 2435 F07b –80 –90 –100 –100 –120 –130 –140 DIFFERENTIAL INPUT SIGNAL FREQUENCY DEVIATION FROM NOTCH FREQUENCY fEOSC/2560(%) –12 –8 –4 0 4 8 12 2435 F07c –80 –85 –90 –95 –100 –105 –110 –115 –120 –125 –130 –135 –140 Figure 7a. LTC2435/LTC2435-1 Normal Mode Rejection When Using an External Oscillator of Frequency fEOSC without Running Averages |
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