MAX3275/MAX3277 19-2207 Rev 1 3/05 Low-Noise, Fibre Channel Transimpedance Amplifiers General Description Features The MAX3275/MAX3277 transimpedance amplifiers Up to 2.125Gbps (NRZ) Data Rates provide a compact low-power solution for communica- 7ps Deterministic Jitter for <100A P-P P-P tion up to 2.125Gbps. They feature 300nA input- Input Current referred noise at 2.1GHz bandwidth (BW) with 0.85pF input capacitance. The parts also have 2mA AC P-P 300nA Input-Referred Noise at 2.1GHz RMS input overload. Bandwidth The MAX3277 is identical to the MAX3275, but with the 25mA Supply Current at +3.3V output polarities inverted for optimum packaging flexi- bility. Both parts operate from a single 3.3V supply and 2.3GHz Small-Signal Bandwidth consume only 83mW. The MAX3275/MAX3277 are 2.0mA AC Overload P-P compact 24mil x 47mil die and require no external com- pensation capacitor. A space-saving filter connection is Die Size: 24mil x 47mil provided for positive bias to the photodiode through an on-chip 600 resistor to V . These features allow CC easy assembly into a TO-46 or TO-56 header with a Ordering Information photodiode. PART TEMP RANGE PIN-PACKAGE The MAX3275/MAX3277 and MAX3274 limiting ampli- fiers provide a two-chip solution for dual-rate, fibre MAX3275U/D 0C to +85C Dice* channel receiver applications. MAX3277U/D 0C to +85C Dice* *Dice are guaranteed to operate from 0C to +85C, but are test- ed only at T = +25C. A Applications Dual-Rate Fibre Channel Optical Receivers Gigabit Ethernet Optical Receivers Typical Application Circuit SMALL FORM FACTOR HOST SERVER OPTICAL RECEIVER OR SWITCH +3.3V +3.3V 4.7k TO 400pF 10k V CC LOS LOS 600 MAX3275 MAX3274 0.1 F 0.1 F DESERIALIZER C FILTER OUT+ IN+ OUT+ 400pF IN LIMITING 100 100 TIA AMP OUT- IN- OUT- 0.1 F 0.1 F GND TH SQUELCH BWSEL RATE SELECT 660 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.Low-Noise, Fibre Channel Transimpedance Amplifiers ABSOLUTE MAXIMUM RATINGS Power-Supply Voltage (V ).................................-0.5V to +4.0V Operating Junction Temperature Range (T )....-55C to +150C CC J Continuous CML Output Current Storage Ambient Temperature Range (T ) ...-55C to +150C STG (OUT+, OUT-) ...............................................-25mA to +25mA Die Attach Temperature...................................................+400C Continuous Input Current (IN)...............................-4mA to +4mA Continuous Input Current (FILTER).......................-8mA to +8mA 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 = 0C to +85C. Typical values are at V = +3.3V, source capacitance (C ) = 0.85pF, T = +25C, CC A CC IN A unless otherwise noted.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I Including output termination current 25 41 mA CC -3dB, C = 0.6pF (Note 3) 2.0 2.7 3.3 IN Small-Signal Bandwidth BW GHz -3dB, C = 0.85pF (Note 3) 1.7 2.3 2.7 IN Low-Frequency Cutoff -3dB, input current = 40A (Note 3) 65 kHz Input Bias Voltage 1.0 V Input Resistance 40 C = 0.6pF, BW = 0.8GHz (Notes 3, 4) 185 250 IN C = 0.6pF, BW = 1.6GHz (Notes 3, 4) 245 350 IN C = 0.6pF, BW = 2.1GHz (Notes 3, 4) 275 380 IN Input-Referred Noise I nA N RMS C = 0.85pF, BW = 0.8GHz (Notes 3, 4) 193 275 IN C = 0.85pF, BW = 1.6GHz (Notes 3, 4) 272 400 IN C = 0.85pF, BW = 2.1GHz (Notes 3, 4) 300 430 IN AC Input Overload (Notes 3, 5) 2 mA P-P DC Input Overload (Note 5) 1 mA Filter Resistance 510 600 690 P-P Output Resistance (OUT+, OUT-) Single-ended 42.5 50 57.5 1mA < input < 2mA (Notes 3, 6, 7) 15 40 P-P P-P Deterministic Jitter DJ 100A < input 1mA (Notes 3, 6, 7) 15 31 ps P-P P-P P-P 10A < input 100A (Notes 3, 6, 7) 7 16 P-P P-P Transimpedance Differential output 2.8 3.3 3.8 k Transimpedance Linear Range 0.95 < linearity < 1.05 (Note 8) 50 A P-P Data Output Swing Input > 100A (Note 9) 220 300 500 mV P-P P-P Input > 200A , 20% to 80% rise/fall time P-P Output Data-Transition Time 90 140 ps (Notes 3, 10) Freq 1GHz 15 Output Return Loss dB 1GHz < freq 2GHz 10 f < 1MHz (Note 11) 40 Power-Supply Rejection PSR dB 1MHz f < 10MHz (Note 11) 34 2 MAX3275/MAX3277