MAX3272/MAX3272A 19-2269 Rev 3 11/04 +3.3V, 2.5Gbps Low-Power Limiting Amplifiers General Description Features The MAX3272/MAX3272A 2.5Gbps limiting amplifiers Single +3.3V Power Supply accept a wide range of input voltages and provide a 33mA Supply Current constant-level output voltage with controlled edge speeds. Additional features include power detectors 5ps Deterministic Jitter with programmable loss-of-signal (LOS) indication, an 90ps Edge Speed optional squelch function that mutes the data output sig- Output Squelch Function nal when the input voltage falls below a programmable threshold, and an output polarity selector. These parts Programmable Loss-of-Signal Function exhibit excellent jitter performance and have low power CML Output Interface dissipation. 20-Pin 4mm 4mm QFN or Thin QFN Package The MAX3272/MAX3272A feature current-mode logic (CML) data outputs that are tolerant of inductive con- Selectable Output Polarity nectors, and are available in a 4mm 4mm QFN pack- age or in die form (MAX3272 only). Along with the Ordering Information MAX3271, the MAX3272/MAX3272A are ideal for low- PIN- PACKAGE power, compact optical receivers. TEMP RANGE PART PACKAGE CODE Applications MAX3272EGP -40C to +85C 20 QFN G2044-3 Gigabit Ethernet Optical Receivers MAX3272E/D -40C to +85C Dice* Fibre Channel Optical Receivers MAX3272AETP+ -40C to +85C 20 Thin QFN T2044-3 System Interconnects MAX3272AEGP -40C to +85C 20 QFN G2044-3 + Denotes Lead-Free Package. 2.5Gbps Optical Receivers *Dice are designed and guaranteed to operate from -40C to SONET/SDH Receivers +85C, but are tested only at T = +25C. A Pin Configuration appears at end of data sheet. Typical Operating Circuit C AZ +3.3V +3.3V CAZ1 CAZ2 V CC MAX3272/ +3.3V OUTPOL MAX3272A V CC SDI+ SDO+ OUT+ IN+ SDO- 0.1F 100 MAX3873 0.1F SCLKO+ IN- CDR OUT- SCLKO- SDI- GND MAX3271 CLOS TH SQUELCH GND LOS LOS LEVEL C CLOS R LOSS TH OF SIGNAL Typical Operating Circuits continue at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE+3.3V, 2.5Gbps Low-Power Limiting Amplifiers ABSOLUTE MAXIMUM RATINGS Power-Supply Voltage (V ).................................-0.5V to +6.0V Continuous Current at CC Voltage at IN+, IN- ..........................(V - 2.4V) to (V + 0.5V) CML Outputs (OUT+, OUT-) .........................-25mA to +25mA CC CC Voltage at SQUELCH, CAZ1, CAZ2, Continuous Power Dissipation at +85C TH, CLOS ...............................................-0.5V to (V + 0.5V) 20-Pin Thin QFN (derate 16.9mW/C above +85C) ......1.1W CC Voltage at LOS, LOS (MAX3272)...........................-0.5V to +6.0V 20-Pin QFN (derate 20mW/C above +85C) .................1.3W Voltage at LOS, LOS (MAX3272A) .............-0.5V to (V + 0.5V) Storage Ambient Temperature CC Voltage at LEVEL...................................................-0.5V to +2.0V Range (T ).................................................-55C to +150C STG Voltage at OUTPOL...............................................-0.5V to +6.0V Operating Junction Temperature Current into LOS, LOS ..........................................-1mA to +9mA Range (T ) .....................................................-55C to +150C J Differential Input Voltage (IN+ - IN-).................................2.5V Die Attach Temperature...................................................+400C P-P Continuous Current at IN+, IN- ...........................................50mA Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3.0V to +3.6V, T = -40C to +85C. Typical values are at V = +3.3V and T = +25C, unless otherwise noted.) (Note 1) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I (Note 2) 33 44 mA CC Input Data Rate 2.5 Gbps Input Voltage Range V Differential 15 1200 mV IN P-P Output Deterministic Jitter (Notes 3, 4, 5) 5 27 ps P-P Random Jitter (Notes 4, 6) 3 ps RMS 15mV < V 30mV 90 130 Data Output Edge Speed P-P IN P-P (Notes 3, 4) ps (20% to 80%) 30mV V 1200mV 90 115 P-P IN P-P Differential Input Resistance R IN+ to IN- 95 100 105 IN Input-Referred Noise 220 V RMS CML Output Voltage V LEVEL open, R = 50 550 750 1200 mV OUT LOAD P-P Output Signal when Squelched Outputs AC-coupled 2.2 mV P-P Power-Supply Noise Rejection PSNR f 2MHz (Note 7) 30 dB C = open 0.9 MHz AZ Low Frequency Cutoff f OC C = 0.1F 1.5 kHz AZ Output Resistance R Single ended to V 42.5 50 57.5 OUT CC 2.5GHz 10 Single-Ended Output Return dB Loss 2.5GHz to 4.0GHz 9 Differential Input Return Loss 4.0GHz 10 dB V 0.8 IL OUTPOL Input Limits V V 2.4 IH LOS Hysteresis (Notes 3, 4, 8) 2 3.3 dB C = open (Notes 3, 9, 10) 1 CLOS LOS Assert/Deassert Time s C = 0.01F (Notes 3, 9, 10) 2.3 50 100 CLOS Low LOS Assert Level R = 20k (Notes 3, 10) 4.5 6.5 mV TH P-P Low LOS Deassert Level R = 20k (Notes 3, 10) 9.5 12.7 mV TH P-P Medium LOS Assert Level R = 1k (Notes 3, 10) 7.8 12.9 mV TH P-P Medium LOS Deassert Level R = 1k (Notes 3, 10) 17.4 22.4 mV TH P-P High LOS Assert Level R = 80 (Notes 3, 10) 24.3 48 mV TH P-P 2 MAX3272/MAX3272A