Optical Receiver Module SRP00294x SRP00295x (Photodiode with Preamplifier) * InGaAs/InP-PIN-photodiode with Preamplifier-IC * Designed for SONET OC-48 / SDH STM-16 applications in fiber-optic communication systems * Hermetically sealed 4-pin TO46 coaxial package * MMF-pigtail with different connectors * Sensitive in both opt. windows (1310 and 1550 nm) * 3dB-Bandwidth 1600 MHz * Module with high optical sensitivity -22 dBm * High dynamic range ( > 20 dB ) * 28,8 k transimpedance (differential) * Differential output with 60 impedance * Excellent noise immunity * SRP00295x with flange for easy mounting Maximum Ratings Optical power ratings refer to the SM fiber input. Parameter Symbol Values Unit Operating temperature range at case Tc - 40... +85 C Storage temperature range Tstg - 40... +85 C Soldering temperature Tmax for 10s, 2 mm distance from bottom edge of case Tmax 260 C Maximum voltage Vcc 6 V Maximum optical power (average) Pmax 1000 W SRP00294x.doc page 1 from 4 Issue 07.05.1998 Principal function: 4 + 1 3 - 2 Characteristics at Vcc= 5,0V @ TA= 25C, unless otherwise specified. Optical power data refer to SM fibre as optical port. Typical values, if not otherwise specified. DC-Characteristics Symbol Min. Typ. Max. Supply Voltage VCC 4,5 5 5,5 Supply Current ICC AC-Characteristics -9 Optical Sensitivity (BER 10 ) Symbol Linear Bandwidth (-3dB) BW Low frequency cutoff fcutoff Optical overload 47 Min. V mA Max. Unit -22 dBm 1600 MHz Pmax 900 kHz W Transresistance, differential RT 28,8 k Output resistance, differential Rout Gain, differential G Optical Return Loss RL SRP00294x.doc S Typ. Unit 65 50 60 23 -27 page 2 from 4 70 mV/W dB Issue 07.05.98 Description The SRP00294x / SRP00295x is an optical receiver module which uses a high-speed PIN-photodetector coupled with a hybrid low noise transimpedance amplifier (TIA) for 1310 nm or 1550 nm optical communications. The PIN-Photodiode is made of InGaAs/InP and has an active diameter of 75 m. The function of the PIN-TIA module is to detect input optical power, to transduce the incident radiation into current and then to convert the current into a voltage and drive 50 line. The low input noise current density of the transimpedance amplifiers provides the optical receiver module, when used with appropriate filtering, with ample sensitivity for realizing minimum input power requirements. Designers of optical receivers can use the module in any application that benefits from integration of the photodiode and TIA into a TO coaxial package. Typical for such applications are receivers for digital crossconnects, digital loop carriers, add/drop-multiplexers and optical network units. The SRP00294x / SRP00295x is also beneficial because it operates from a single +5 volt supply and is packaged in a compact, hermetically sealed module. In addition, the SRP00294x / SRP00295x, which has three isolated leads, requires fewer electrical connections and no additional shielding compared with discrete implementations of the photodetection / TIA-function. These features make the SRP00294x / SRP00295x an excellent optical receiver module of benefit in other fiber optic receiver applications. Application Gnd 2 Out+ 1 3 4 VCC The outputs Out+ and Out - can be (AC-coupled!) loaded with 50 Ohm. Both outputs have to be terminated with the same load. Out- At small optical input power (< 10W) the photocurrent produced in the photodiode can be directly measured between Vcc and Gnd without applying any voltage at Vcc. (At higher optical input power the photocurrent is not proportional to the optical input power.) Pinout (bottom view) SRP00294x.doc page 3 from 4 Issue 07.05.98 Some eye diagrams Popt= 5 W avg. (OC-48/STM-16) Popt= 10 W avg. (OC-48/STM-16) Popt= 100 W avg. (OC-48/STM-16) Popt= 500 W avg. (OC-48/STM-16) SRP00294x.doc page 4 from 4 Issue 07.05.98