Datasheet
ADN2848 Data Sheet
Rev. B | Page 6 of 12
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
02746-003
PIN 1
INDICATOR
TOP VIEW
(Not to Scale)
24 IBMON
23 IMMON
22 GND3
21 V
CC
3
LBWSET 1
ASET 2
ERSET 3
32 CCBIAS
20 ALS
19 FAIL
18 DEGRADE
17 CLKSEL
9
10
11
12
13
14
15
16
PSET 4
IMPD 5
IMPDMON 6
GND4 7
V
CC
4 8
31 I
BIAS
30 GND2
29 GND2
28 IMODP
27 GND2
26 IMODN
25 V
CC
2
ADN2848
ERCAP
PAVCAP
V
CC
1
DATAN
DATAP
GND1
CLKP
CLKN
NOTES
1. THE EXPOSED PAD ON THE BOTTOM OF THE PACKAGE
MUST BE CONNECTED TO THE DEVICE GND.
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1 LBWSET Loop Bandwidth Select.
2
ASET
Alarm Threshold Set Pin.
3 ERSET Extinction Ratio Set Pin.
4 PSET Average Optical Power Set Pin.
5 IMPD Monitor Photodiode Input.
6 IMPDMON Mirrored Current from Monitor Photodiode—Current Source.
7 GND4 Supply Ground.
8 V
CC
4 Supply Voltage.
9 ERCAP Extinction Ratio Loop Capacitor.
10 PAVCAP Average Power Loop Capacitor.
11 V
CC
1 Supply Voltage.
12 DATAN Data Negative Differential Terminal.
13 DATAP Data Positive Differential Terminal.
14
GND1
Supply Ground.
15 CLKP Data Clock Positive Differential Terminal. This pin is used if CLKSEL = V
CC
.
16 CLKN Data Clock Negative Differential Terminal. This pin is used if CLKSEL = V
CC
.
17 CLKSEL Clock Select (Active = V
CC
). This pin is used if data is clocked into chip.
18 DEGRADE DEGRADE Alarm Output.
19 FAIL FAIL Alarm Output.
20 ALS Automatic Laser Shutdown.
21 V
CC
3 Supply Voltage.
22 GND3 Supply Ground.
23 IMMON Modulation Current Mirror Output—Current Source.
24 IBMON Bias Current Mirror Output—Current Source.
25 V
CC
2 Supply Voltage.
26 IMODN Modulation Current Negative Output. Connect this pin via a matching resistor to V
CC
.
27 GND2 Supply Ground.
28 IMODP Modulation Current Positive Output. Connect this pin to the laser diode.
29, 30 GND2 Supply Ground.
31 I
BIAS
Laser Diode Bias Current—Current Sink.
32
CCBIAS
Connected to Vcc When DC-Coupled to Laser Diode; Connected to I
BIAS
When AC-Coupled to Laser
Diode—Current Sink.
EP EPAD Exposed Pad. The exposed pad on the bottom of the package must be connected to the device GND.