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ADN2847 Datasheet(PDF) 2 Page - Analog Devices

Part # ADN2847
Description  3 V Dual-Loop 50 Mbps to 3.3 Gbps Laser Diode Driver
PDF  12 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADN2847 Datasheet(HTML) 2 Page - Analog Devices

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REV. 0
–2–
ADN2847–SPECIFICATIONS
Parameter
Min
Typ
Max
Unit
Conditions/Comments
LASER BIAS (BIAS)
Output Current IBIAS
2
100
mA
Compliance Voltage
1.2
VCC
V
IBIAS during ALS
0.1
mA
ALS Response Time
5
µsI
BIAS < 10% of nominal
CCBIAS Compliance Voltage
1.2
VCC
V
MODULATION CURRENT (IMODP, IMODN)
2
Output Current IMOD
580
mA
Compliance Voltage
1.5
VCC
V
IMOD during ALS
0.1
mA
Rise Time (See Figure 4 for Typical Distribution)
3
80
120
ps
Fall Time (See Figure 5 for Typical Distribution)
3
80
120
ps
Random Jitter
3
1
1.5
ps
RMS
Pulsewidth Distortion
3
15
ps
IMOD = 40 mA
MONITOR PD (MPD, MPD2)
Current
50
1200
µAAverage Current
Compliance Voltage
1.65
V
POWER SET INPUT (PSET)
Capacitance
80
pF
Monitor Photodiode Current into RPSET Resistor
50
1200
µAAverage Current
Voltage
1.1
1.2
1.3
V
EXTINCTION RATIO SET INPUT (ERSET)
Allowable Resistance Range
1.2
25
k
Ω
Voltage
1.1
1.2
1.3
V
ALARM SET (ASET)
Allowable Resistance Range
1.2
25
k
Ω
Voltage
1.1
1.2
1.3
V
Hysteresis
5
%
CONTROL LOOP
Low Loop Bandwidth Selection
Time Constant
0.22
s
LBWSET = GND
2.25
s
LBWSET = VCC
DATA INPUTS (DATAP, DATAN, CLKP, CLKN)
4
V p-p (Single-Ended, Peak-to-Peak)
100
500
mV
Data and Clock Inputs Are
Input Impedance (Single-Ended)
50
Ω
AC-Coupled
tSETUP
5 (See Figure 1)
50
ps
tHOLD
5 (See Figure 1)
100
ps
LOGIC INPUTS (ALS, LBWSET, CLKSEL)
VIH
2.4
V
VIL
0.8
V
ALARM OUTPUTS (Internal 30 k
Ω Pull-Up)
VOH
2.4
V
VOL
0.8
V
IDTONE
Compliance Voltage
VCC –1.5
V
I
I
Ratio
OUT
IN


2
fIN
6
0.01
1
MHz
IBMON, IMMON, IMPDMON, IMPDMON2
IBMON, IMMON Division Ratio
100
A/A
IMPDMON, IMPDMON2
1
A/A
IMPDMON to IMPDMON2 Matching
2
%
IMPD = 1200
µA
Compliance Voltage
0
VCC –1.2
V
(V
CC = 3.0 V to 3.6 V. All specifications TMIN to TMAX, unless
otherwise noted.
1 Typical values as specified at 25 C.)
User to Supply Current Sink
in the Range of 50
µA to 4 mA



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