High Performance Optical Component Solutions DATA S H E E T ATA2400-40 2.5Gb/s APD Preamp Receiver Features High sensitivity -34dBm. High dynamic range. High bandwidth. Integral thermistor. Applications Long reach STM16/OC48 receivers. Description The ATA 2400 APD Pre-amp comprises a high speed APD coupled to a noninverting HBT transimpedance amplifier with a style-ended output. The receiver is housed in an 8 pin butterfly package with a single mode fibre pigtail. The integral thermistor may be used in an active bias control loop to compensate for ambient temperature variation. Integral non-inverting amp-light on-> logic high. 1 8 10 k o @ 25 C 2 7 3 6 4 5 ATA2400-40 Characteristics (Tcase = 25oC, Wavelength = 1550nm, Vcc = 5V unless otherwise stated) Parameter Symbol Min Typ Module responsivity R-15 R-13 0.75 0.70 0.92 0.88 Module breakdown voltage Vbr 40 52 Max 65 Unit Conditions A/W A/W 1550nm, M=1 1310nm, M=1 V o Ir=10A Temperature coef of Vbr 0.12 V/ C =dVbr/dTc Transimpedance Zt 1.7 k DC-coupled, RL=50 Bandwidth (-3dB) BW Sensitivity Output amplitude 1.8 Pr Vout 12 Overload power Pol -7 Optical return loss Prtn 30 Power supply voltage Vcc Vr 10 Power supply current Icc Thermistor resistance Rth 2.4 3.2 GHz AC-coupled, RL=50, M=10 -34 -32.5 dBm 2.5Gb/s, PRBS=2^(23)-1 NRZ, BER=10^(-10) Vr=optimum Vbias 2000 mVpp dBm -5 M=3 dB 65 V V 69 80 mA 10 10.5 K 5 9.5 max. value at -8dBm, M=3 min. value at -34dBM, M=10 APD bias Absolute Ratings These limits are absolute stress levels only, functional operation of the device is not guaranteed at these levels. Long - term exposure to these limits could result in reduced reliability of the device. (Tcase=25oC unless otherwise stated) Parameter Operating case temp. Symbol Top Min -20 Typ Max Unit 70 o o C C Storage temp. Tstg -40 85 Supply voltage Vcc 0 6 V APD reverse voltage Vr 0 Vbr V APD reverse current Ir 2 mA Lead soldering temperature - 250 Lead soldering time - 10 ATA2400-40 High speed APD/Preamp Conditions o C s Breakdown voltage (Vbr) varies from device to device. Vbr value supplied with each device ATA2400-40 Outline Drawing 10.2 Dimensions in mm o2.5 2 X O2.4 o1.7 15 12.9 15.4 30 8.55 6.45 11.2 R 1.2 7 3.4 10 15 2 20 4.4 0.8 6.5 24 7.94 8 x 0.5 3 x 2.54 = 7.62 Instructions for Use - ATA2400-40 Pin 1 APD Bias (+) DC bias voltage for the APD. During power-up, in order to prevent forward-biasing the APD, this bias voltage should be applied before the pre-amp power (PIN 3) is applied. The maximum mean current is O.5mA. The bias voltage will normally be controlled externally to optimise the operating point. This voltage will typically range from 10V to 65V. and 5.25V to be applied after the APD bias voltage is present. The supply should be filtered to minimise noise ingress and be capable of delivering up to 80mA. Pin 4 Nc No connection on this pin. Pin 6 Output Ground all pins for optimum performance. The RF output has a DC offset typically between 1.9V and 3.0V, so may be AC coupled into 50 load. Maximum output is 2Vpp. Pin 3 Vcc (+) Pin 8 Thermistor Positive supply voltage between 4.75V The negative temp coefficient thermistor Pin 2, 7, 5 Ground may be used in a control loop to optimise the bias voltage according to device temperature. The thermistor has a nominal resistance of 10k at 25oC, and is not polarity sensitive although one side is connected to package ground. Operating current should be limited to 100A to prevent self-heating errors. ATA2400-40 High speed APD/Preamp ATA2400-40 Connections Pin 1 APD bias (+) 2 Pin 5 Ground Ground 6 Output (DC coupled) 3 Power supply Vcc (+) 7 Ground 4 Not connected 8 Thermistor Device Ordering Information Order Code No. ATA2400 - 40C** Connector types: SC/PC = C28, fibre length 975 - 1035mm FC/PC = C33, fibre length 975 - 1035mm Nortel Networks Optical Components Ltd. Brixham Road Paignton Devon TQ4 7BE United Kingdom Tel: +44 1803 662106 Fax: +44 1803 662801 Email: opticalcomponents@nortelnetworks.com www.nortelnetworks.com/components/ PB0095 ISSUE 2 July 2000 Certificate No. FM 15040 All data in this document is subject to change in accordance with Nortel Networks Corporation policy of continual product improvement. No data in this document is intended to be used in connection with any contract except as may be first confirmed in writing by Nortel Networks Corporation. The publication of information in this document does not imply freedom from patent or other rights of Nortel Networks Corporation or others. (c) 2000 Nortel Networks. All rights reserved. (c) Nortel Networks, Nortel Networks Logo, the Globemark and Unified Networks are trademarks of Nortel Networks. Information in this document is subject to change without notice. Nortel Networks assumes no responsibility for errors that might appear in this document. Printed in England. Certificate No. EMS 35100