7820R Optical Receiver
5-200 MHz RFoG Return Path
DATASHEET | MARCH 2012
FIBER OPTICS
The 7820R RFoG return path optical receiver is a single-mode fiber pigtailed
module featuring a low-noise, impedance-matched broadband photodiode and RF
amplification.
The device receives optical analog and/or digital signals for a range of return path,
and delivers the corresponding RF electrical output.
The 7820R exhibits excellent noise performance with values well above standards
over the entire 200MHz bandwidth and case temperature specifications (-40°C to
+85°C).
Applications
Video Signal Distribution in RFoG and
FTTx nodes
Video Overlay in Passive Optical
Networks (PON).
Moreover, the proprietary impedance-match circuitry between the photodetector and
RF amplification stages resolves a number of OEM design obstacles. The device’s
noise performance is typically less than 0.75pA/√Hz for the 85MHz version and
1pA/√Hz for the 200MHz version.
The 7820R RFoG return path optical receiver can be used in the optical wavelength
range from 1260nm – 1620nm applications.
The 7820R is compliant with all criteria of the Restriction of the Use of Hazardous
Substances in Electrical and Electronic Equipment (RoHS) guidelines 2002/95/EC.
Features
5 MHz-200 MHz Bandwidth Supports the
Return Path Application.
Excellent RF Frequency, High RF
Output.
Low Noise (<1.0 pA/√Hz typ.) Low
Power Dissipation (0.5 W max).
RoHS Compliant
Internal Prorietary Impedance Match
Circuitry (75Ω)
Robust Small Package with Single-Mode
Fiber Pigtail and Connector Options
Wide Operating Case Temp Range, -40
O
to + 85
O
C
Performance Highlights
Parameter
Frequency Range
Noise
5 – 85MHz Version
5 – 200MHz Version
DSO (20% OMI/tone)
DTO (20% OMI/tone)
Optical Input Power
Wavelength
Power Consumption
0.75 pA/√Hz (typ)
1.0 pA/√Hz (typ)
-60 dBc (typ)
-50 dBc (typ)
Up to -10dBm
1260 – 1620 nm
0.5 W
Limits
5 – 200 MHz
| REV 2012.03
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
7820R Optical Receiver
5-200 MHz RFoG Return Path
DATASHEET | MARCH 2012
FIBER OPTICS
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress
ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the
operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect
device reliability.
Parameter
Operating Case Temperature Range
Storage Temperature Range
Humidity at 85 °C
o
Symbol
T
CASE
T
stg
RH
Min
-40
-40
--
Max
85
85
85
Unit
°C
°C
%
Note: For all tables, typical values are performed at 25 C; min and max values are performance vs. temperature.
Electrical/Optical Characteristics
Parameter
Optical Power
5 – 85MHz Version
5 – 200MHz Version
Optical Return Loss
DC Power
+5V Amp Bias, (Pin 2)
+12V PD Bias, (Pin 6)
Wavelength
Responsivity
PDI Monitor Voltage
Dissipation
Symbol
P
IN
RL
OPT
I
CCA
I
CCP
λ
--
V
MON
P
DISS
Min
--
Typ
--
--
--
--
1310/1550
>0.8 at 1310 nm
>0.9 at 1550 nm
10
--
Max
-10
-7
--
100
1
1620
--
--
--
0.5
Unit
dBm
dB
mA
mA
nm
mA/mW
mA/mW
V/mA
W
40
--
--
1260
--
--
--
--
RF Characteristics
Parameter
Frequency Response
Gain (Ref @ 5MHz)
5 – 85MHz Version
5 – 200MHz Version
Gain Stability
(-40C to + 85C)
Ripple
Gain Tilt
(3)
(2)
Symbol
BW
G
Min
5
36
29
-0.5
--
--
37
35
Typ
--
--
Max
85
38
31
+0.5
1.2
2
39
37
Unit
MHz
dB
G
ST
--
--
--
1
1
--
dB
dBpk-pk
dB
dBmV/ch
RF Output Level
5-85 MHz Version
5 – 200 MHz Version
RF
OUT
| REV 2012.03
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
7820R Optical Receiver
5-200 MHz RFoG Return Path
DATASHEET | MARCH 2012
FIBER OPTICS
RF Characteristics (continued)
Parameter
Output Return Loss
Equivalent Input Noise
5 – 85MHz Version
5 – 200MHz Version
Discrete Second-Order
Discrete Third Order
(1,2)
(1,2)
Symbol
RL
EIN
DSO
DTO
Min
--
--
--
--
Typ
--
0.75
1.0
-60
-70
Max
-16
0.9
1.30
-50
-60
Unit
dB
pA/√Hz
dBc
dBc
(1). Two laser test at 1310 nm/1550 nm. 40% OMI/tone (before combined). Distortion products measured at 40 and 85 MHz.
(2). 5 – 85MHz Version, Optical Input = -10dBm, OMI = 20% (after combined)
5 – 200MHz Version, Optical Input = -7dBm, OMI = 20% (after combined)
(3). Tilt is defined as the delta between 5 – 85MHz for 7820R-085 and 5 – 200MHz for 7820R-200.
Outline Drawing (dimensions are in inches & mm)
| REV 2012.03
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
京公网安备 11010802033920号
EEWORLD
