The SQOB300R Optical Receive Receiver Block is is a high dynamic range optical reverse receiver block with amplifier circuits. It has a single-mode optical input suitable for 1260 to 1620 nm wavelengths, a terminal to monitor the photo diode current and an electrical output having a characteristic impedance of 75 Ω.
The device is ideally suited for use in CATV return path applications, including DOCSIS 3.1 systems where low distortions and low noise figure are required.
l 5 - 300 MHz Bandwidth Supports the return Path application, wide bandwidth for DOCSIS 3.1
l +5 V Amp Bias, +12 V PD Bias
l Extremely Low noise
l Excellent flatness
l Standard CATV outline
l Rugged construction
l RoHS Compliant
l Cable TV optical transmission systems operating in the 5 to 300 MHz reverse path.
Specifications: T = +25 °C, Vamp = +5 V, VPD = +12 V, Z = 75 Ω
Table 1. Electrical/Optical Characteristics
Optical Return Loss
+5V Amp Bias, (Pin 2)
+12V PD Bias, (Pin 6)
>0.8 at 1310 nm
>0.9 at 1550 nm
PDI Monitor Voltage
Table 2. RF Characteristic
Gain (Ref @ 40 MHz)
Gain Stability (- 30 to + 85°C)
Ripple (5 - 300 MHz)
dBpk - pk
RF Output Level 2
dBmV / ch
Output Return Loss
(5 - 200 MHz)
(201 - 300 MHz)
Equivalent Input Noise
Discrete Second-Order 1
Discrete Third Order1,2
2. Optical Input = 0 dBm, OMI = 20%
Please observe the following precautions to avoid damage:
Fiberglass optical coupling
Maximum tensile strength = 5 N. Minimum bending radius = 35 mm.
Gallium Arsenide Integrated Circuits are sensitive to electrostatic discharge (ESD) and can be damaged by static electricity. Proper ESD control techniques should be used when handling these devices.
Absolute Maximum Ratings
- 40 to +85
Operating Mounting Base Temperature
- 30 to +85
Humidity at 85 °C
Caution! ESD sensitive device. RoHS
Alarm: Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied.
Package Drawing (Dimensions in millimeters)
Outline Drawing (dimensions are in inches & mm)
SQOB300R Optical Receiver Block, with SC/APC Connector
SQOB300R Optical Receiver Block, with FC/APC Connector
Shanghai Qianjin Electronic equipment Co., LTD was founded in 1991. It is a scale and specialized CATV equipment manufacturer with research, development and production. Our company has been identified as high-tech enterprises, strict compliance with international standards and pass GB / T 9001 quality management system certification.
Our good reputation and perfect product service system has won praise from customers. Products are sold to Europe, America, Asia and other countries and regions, as OEM / ODM supplier.
Address: 4/F,Budliding No.2,401 Caobao Road Shanghai China