ADN2841(2002) データシートの表示（PDF） - Analog Devices
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ADN2841 Datasheet PDF : 12 Pages
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ADN2841
48-Lead LFCSP
PIN CONFIGURATIONS
32-Lead LFCSP
GND2 37
VCC2 38
IMODN 39
IMODN 40
GND2 41
IMODP 42
IMODP 43
GND2 44
GND2 45
IBIAS 46
IBIAS 47
CCBIAS 48
ADN2841
TOP VIEW
(Not to Scale)
PIN 1
INDICATOR
24 GND
23 GND
22 CLKN
21 CLKP
20 GND1
19 DATAP
18 DATAN
17 GND1
16 VCC1
15 GND
14 PAVCAP
13 ERCAP
LBWSET 1
ASET 2
ERSET 3
PSET 4
IMPD 5
IMPDMON 6
GND4 7
VCC4 8
PIN 1
INDICATOR
ADN2841
TOP VIEW
(Not to Scale)
24 IBMON
23 IMMON
22 GND3
21 VCC3
20 ALS
19 FAIL
18 DEGRADE
17 CLKSEL
Pin No.
48-Lead 32-Lead
1
2
1
3
2
4
3
5
4
6
7
5
8
6
9
10
11
7
12
8
13
9
14
10
15
16
11
17
18
12
19
13
20
14
21
15
22
16
23
24
25
26
17
27
18
28
19
29
20
30
21
31
22
32
23
33
24
34
35
36
Mnemonic
GND
LBWSET
ASET
ERSET
PSET
GND
IMPD
IMPDMON
IMPDMON2
IMPD2
GND4
VCC4
ERCAP
PAVCAP
GND
VCC1
GND1
DATAN
DATAP
GND1
CLKP
CLKN
GND
GND
GND
CLKSEL
DEGRADE
FAIL
ALS
VCC3
GND3
IMMON
IBMON
GND2
IDTONE
GND2
PIN FUNCTION DESCRIPTIONS
Function
Supply Ground
Select Low Loop Bandwidth (Active = VCC)
Alarm Current Threshold Setting Pin
Extinction Ratio Set Pin
Average Optical Power Set Pin
Ground
Monitor Photodiode Input
Mirrored Current from Monitor Photodiode
Mirrored Current from Monitor Photodiode 2 (for Use with Two MPDs)
Monitor Photodiode Input 2–(for Use with Two MPDs)
Supply Ground
Supply Voltage
Extinction Ratio Loop Capacitor
Average Power Loop Capacitor
Ground
Supply Voltage
Supply Ground
Data, Negative Differential Terminal
Data, Positive Differential Terminal
Supply Ground
Data Clock Positive Differential Terminal, used if CLKSEL = VCC
Data Clock Negative Differential Terminal, used if CLKSEL = VCC
Ground
Ground
Ground
Clock Select (Active = VCC), used if data is clocked into chip
DEGRADE Alarm Output
FAIL Alarm Output
Automatic Laser Shutdown
Supply Voltage
Supply Ground
Modulation Current Mirror Output
Bias Current Mirror Output
Supply Ground
IDTONE (Requires External Current Sink to Ground)
Supply Ground
–4–
REV. A
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