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ADN2841 Datasheet(PDF) 6 Page - Analog Devices |
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ADN2841 Datasheet(HTML) 6 Page - Analog Devices |
6 / 16 page ADN2841 Data Sheet Rev. B | Page 6 of 16 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS PIN 1 INDICATOR ADN2841 TOP VIEW (Not to Scale) GND 1 LBWSET 2 ASET 3 ERSET 4 PSET 5 GND 6 IMPD 7 IMPDMON 8 IMPDMON2 9 IMPD2 10 GND4 11 VCC4 12 36 GND2 35 IDTONE 34 GND2 33 IBMON 32 IMMON 31 GND3 30 VCC3 29 ALS 28 FAIL 27 DEGRADE 26 CLKSEL 25 GND NOTES 1. THE EXPOSED PAD ON THE BOTTOM OF THE PACKAGE MUST BE CONNECTED TO VCC OR THE GND PLANE. Figure 3. Pin Configuration, 48-Lead LFCSP PIN 1 INDICATOR 1 LBWSET 2 ASET 3 ERSET 4 PSET 5 IMPD 6 IMPDMON 7 GND4 8 VCC4 24 IBMON 23 IMMON 22 GND3 21 VCC3 20 ALS 19 FAIL 18 DEGRADE 17 CLKSEL TOP VIEW (Not to Scale) ADN2841 NOTES 1. THE EXPOSED PAD ON THE BOTTOM OF THE PACKAGE MUST BE CONNECTED TO VCC OR THE GND PLANE. Figure 4. Pin Configuration, 32-Lead LFCSP Table 4. Pin Function Descriptions Pin No. 48-Lead LFCSP 32-Lead LFCSP Mnemonic Description 1 GND Supply Ground. 2 1 LBWSET Select Low Loop Bandwidth (Active = VCC). 3 2 ASET Alarm Current Threshold Set Pin. 4 3 ERSET Extinction Ratio Set Pin. 5 4 PSET Average Optical Power Set Pin. 6 GND Ground. 7 5 IMPD Monitor Photodiode Input. 8 6 IMPDMON Mirrored Current from Monitor Photodiode. 9 IMPDMON2 Mirrored Current from Monitor Photodiode 2. For use with two MPDs. 10 IMPD2 Monitor Photodiode Input 2. For use with two MPDs. 11 7 GND4 Supply Ground. 12 8 VCC4 Supply Voltage. 13 9 ERCAP Extinction Ratio Loop Capacitor. 14 10 PAVCAP Average Power Loop Capacitor. 15 GND Ground. 16 11 VCC1 Supply Voltage. 17 GND1 Supply Ground. 18 12 DATAN Data, Negative Differential Terminal. 19 13 DATAP Data, Positive Differential Terminal. 20 14 GND1 Supply Ground. 21 15 CLKP Data Clock, Positive Differential Terminal. Used if CLKSEL = VCC. 22 16 CLKN Data Clock, Negative Differential Terminal. Used if CLKSEL = VCC. 23 GND Ground. 24 GND Ground. 25 GND Ground. 26 17 CLKSEL Clock Select (Active = VCC). Used if data is clocked into the chip. 27 18 DEGRADE Degrade Alarm Output. 28 19 FAIL Fail Alarm Output. 29 20 ALS Automatic Laser Shutdown. 30 21 VCC3 Supply Voltage. |
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