7820C CATV Optical Receiver
200 MHz HFC Return Path
DATASHEET | MARCH 2012
FIBER OPTICS
The 7820C CATV 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 video
broadcast options, and delivers the corresponding RF electrical output in the 200
MHz HFC return path bandwidth.
The 7820C exhibits excellent distortion performance with values well above
standards over the entire bandwidth and case temperature specifications (5 MHz
– 200 MHz, -40 °C to +85 °C).
Applications
Video Signal Distribution in HFC and
FTTx nodes
Moreover, the proprietary impedance-match circuitry between the photodetector
and RF amplification stages resolves a number of OEM design obstacles with
very low noise performance value, typically less than 2 pA/√Hz.
The 7820C Return Path HFC CATV optical receiver can be used in both 1310 nm
and 1550 nm applications being useful at different points of a given network.
The 7820C 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 CATV Application.
Excellent RF Frequency and Distortion
Characteristics for High Linearity.
Low Noise (2 pA/√Hz typ.) Low Power
Dissipation (0.85 W max.) as well as
High RF Output.
RoHS Compliant
Internal Prorietary Impedance Match
Circuitry (75Ω)
Robust Small Package with Single-Mode
Fiber Pigtail and Connector Options
Wide Operating Case Temp Range,
to + 85
O
C
-30
O
Performance Highlights
Parameter
Frequency Range
Noise
DTO
DSO
Optical Input Power
Wavelength
Power Consumption
Limits
5 – 200 MHz
2 pA/√Hz (typ)
-70 dBc (typ)
-65 dBc (typ)
Up to +1dBm
1260 – 1620 nm
0.85 W
| 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.
7820C CATV Optical Receiver
200 MHz HFC 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
-30
-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
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
1.0
--
Max
+1
--
160
3
1620
--
--
--
0.85
Unit
dBm
dB
mA
mA
nm
mA/mW
mA/mW
V/mA
W
40
--
--
1260
--
--
--
--
RF Characteristic
Parameter
Frequency Response
Gain (Ref @ 40MHz)
Gain Stability
(-30C to + 85C)
Ripple (5-200MHz)
Gain Tilt
RF Output Level
(2)
Symbol
BW
G
G
ST
--
--
RF
OUT
RL
EIN
Min
5
28
-0.5
--
--
47
--
--
--
--
Typ
--
--
--
1
0
--
--
--
-65
-70
Max
200
30
+0.5
1.2
1
49
-16
2
-55
-60
Unit
MHz
dB
dB
dBpk-pk
dB
dBmV/ch
dB
pA/√Hz
dBc
dBc
Output Return Loss
(5-200 MHz)
Equivalent Input Noise
Discrete Second-Order
Discrete Third Order
(1)
(1,2)
DSO
DTO
(1) Two laser test at 1310 nm/1550 nm. 40% OMI/tone. Total received optical power = 0 dBm. Distortion products measured
at 40 and 200 MHz.
(2) Optical Input = 0 dBm, OMI = 20%
| 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.
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