AMT128502A 1.25 Gb/s Integrated 850 nm MSM-TIA Data sheet - Rev. 0 FEATURES · 1.25 Gb/s Differential Output TIA · 5V Operation · Automatic Gain Control · 850nm Photodetector with 100 mm x 100 mm Active Area · Integrated MSM detector & TIA · TO-46 Ultra Flat Window APPLICATIONS · Gigabit Ethernet (1.250Gb/s) · Fibre Channel (1.0625 Gb/s) T46F TO-46 Ultra Flat Window Package Product Description The ANADIGICS AMT128502A is a 5V monolithically integrated Metal-Semiconductor-Metal (MSM) photodetector and transimpedance amplifier (TIA) used to convert an 850nm input optical signal into a differential output voltage, and is manufactured in ANADIGICS 6 GaAs wafer fabrication facility. The integrated MSM and TIA receiver maximizes the receiver performance by minimizing the photodetector input parasitics to the TIA and internally biasing the photodetector to achieve high sensitivity, bandwidth and overload performance. As an integrated product the reliability is inherently better than a discrete solution, and both the MSM-TIA integrated circuit and TO46 flat window packaged receiver pass stringent reliability requirements. These products are readily designed into receivers and transceivers for Gigabit Ethernet and Fibre Channel applications. Figure 1: AMT128502A Equivalent Circuit VDD 2 4K OUT 1 3 OUT AGC US Patents: 5047728, 5646573 PIN Charge Pump 4 6.5 GHz Osc AMT128502A Table 1: Absolute Maximum Ratings V DD 7.0 V PIN + 5 dB m TS Storage Temp. - 65 °C to 125 °C Table 2: Electrical Characteristics PAR AMETER MIN TYP MAX Wavelength ( l) 770 850 860 nm - 100 x 100 - µm2 1000 - - V/W 1000 - 1500 MHz - 300 1000 kHz 25 40 60 Ohm D etector Acti ve Area Small Si gnal D i fferenti al Responsi vi ty (1) (@50 MHz) Bandwi dth(1) Low Frequency C utoff Output Resi stance U N IT 0 - - dB m -20 - - 22 700 260 4 15 10 - dB m mV ps % ps Total Ji tter (pk-pk) (3), (5), (7) - 90 - ps Supply C urrent - - 50 mA + 4.5 +5.0 +5.5 Opti cal Overload (2) Opti cal Sensi ti vi ty (2) D i fferenti al Output Voltage (3), (4) TRISE & TFALL (20 - 80%) (3), (4) D uty C ycle D i storti on (3), (5) RMS Ji tter (3), (5), (6) Operati ng Voltage Range Operati ng Ambi ent Temperature Range 0 70 (1) Measured at 14 dBm optical input power with output connected into RL = 100W (differential) (2) Measured at 10-10 BER with a 27-1 PRBS at 1.25 GB/s (3) Input optical power = -3 dBm, RL = 100 W (differential). (4) Measured with a 625 MHz, 50% duty cycle square wave. (5) Measured with a 1.25 Gb/s, 27-1 PRBS. (6) 1s about the center eye crossing. (7) 6s about the center eye crossing. V °C Table 3: Package Pin Description PIN D escription C omment 1 VOUT - TIA Output Voltage (non- i nverted) Logi cal '1' wi th opti cal i nput 2 VDD - Posi ti ve Supply Voltage + 5 Volts 3 VOUT - TIA Output Voltage (i nverted) Logi cal '0' wi th opti cal i nput 4 Ground C ase i s grounded Data Sheet - Revision 0 03/01 2 AMT128502A Figure 3: Eye Diagram with an Optical Input Power of -1.0dBm Figure 2: Eye Diagram with an Optical Input Power of -17dBm 10mV/Div 150mV/Div. 200ps/Div Figure 4: Supply Current vs. Temperature Figure 5: Bandwidth vs. Temperature 1600 Bandwidth (MHz) Supply Current (mA) 50.0 45.0 40.0 35.0 30.0 4.5V 5.0V 5.5V 25.0 1400 1200 1000 4.5V 5.0V 5.5V 800 600 20.0 0 20 40 60 80 0 100 20 Figure 6: Differential Responsivity vs. Temperature 2000 60 80 100 Figure 7: Sensitivity vs. Temperature -20.0 4.5V 5.0V 5.5V 1800 40 Ambient Temperature (C) Sensitivity (dBm) Differential Responsivity (V/W) Ambient Temperature (C) 1600 1400 1200 1000 4.5V 5.0V 5.5V -20.5 -21.0 -21.5 -22.0 -22.5 -23.0 -23.5 -24.0 0 20 40 60 80 100 0 Ambient Temperature (C) 3 200ps/Div 20 40 60 80 Ambient Temperature (C) Data Sheet - Revision 0 03/01 100 AMT128502A Figure 8: Test Setup for Frequency Response Lightwave Analyzer HP 8702D Laser DUT Test Fixture Optical Attenuator Power Supply Extinction Ratio= 3dB Figure 9: Test Setup for Sensitivity BERT Pulse Pattern Generator Error Detector Hybrid Coupler Limiting Amplifier Optical Attenuator Laser 25 dB Gain DUT Test Fixture Extinction Ratio = 9dB Power Supply Figure 10: Test Setup for Eye Measurements Digital Communication Analyzer HP83480A Pulse Pattern Generator Laser Optical Attenuator DUT Test Fixture Extinction Ratio = 9dB Power Supply Data Sheet - Revision 0 03/01 4 AMT128502A Figure 11: DUT Test Fixture Schematic VDD 0.1uF DUT VOUT 0.1uF V OUT 0.1 uF Figure 12: Application Schematic V DD 0.1uF 2 4K OUT 1 CF 3 OUT AGC Charge Pump 0.1uF RO 0.1uF LIMITING AMPLIFIER 6.5 GHz OSC 4 CF is an optional single pole noise filter CF = 1 2π fcR fc is the desired cutoff frequency R = 50 W RO is required with high input resistance limiting amplifiers RO = 100 W 5 Data Sheet - Revision 0 03/01 AMT128502A Figure 13: Evaluation Board Schematic VDD 0.1uF 2 4K OUT OUT 1 0.1uF 3 0.1uF VOUT VOUT AGC Charge Pump 6.5 GHz OSC 4 Figure 14: Evaluation Board Layout Data Sheet - Revision 0 03/01 6 AMT128502A Figure 15: T46F Package Outline Diagram 7 Data Sheet - Revision 0 03/01 AMT128502A Ordering Information Part N umber AMT128502AT46F Package Option TO-46F Package D escription Ultra Flat Wi ndow ANADIGICS, Inc. 141 Mount Bethel Road Warren, New Jersey 07059, U.S.A Tel: +1 (908) 668-5000 Fax: +1 (908) 668-5132 http://www.anadigics.com [email protected] IMPORTANT NOTICE ANADIGICS, Inc. reserves the right to make changes to its products or discontinue any product at any time without notice. The Advanced Product data sheets and product specifications contained in this data sheet are subject to change prior to a products formal introduction. The information in this data sheet has been carefully checked and is assumed to be reliable. However, ANADIGICS assumes no responsibility for inaccuracies. ANADIGICS strongly urges customers to verify that the information they are using is current before placing orders. WARNING ANADIGICS products are not intended for use in life support appliances, devices, or systems. Use of an ANADIGICS product in any such application without written consent is prohibited. 8