ADN2841 Analog Devices, Inc., ADN2841 Datasheet - Page 4

• Manufacturer Part Number: ADN2841
• Description: Dual-loop 50 Mbps.2.7 Gbps Laser Diode Driver
• Manufacturer: Analog Devices, Inc.

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