MAX3665 19-1601 Rev 2 11/05 622Mbps, Ultra-Low-Power, 3.3V Transimpedance Preamplifier for SDH/SONET General Description Features The MAX3665 low-power transimpedance preamplifier +3.3V or +5.0V Single-Supply Operation for 622Mbps SDH/SONET applications consumes only 55nA Input-Referred Noise RMS 70mW at V = 3.3V. Operating from a single +3.3V or CC +5.0V supply, it converts a small photodiode current to a 70mW Power Consumption at V = 3.3V CC measurable differential voltage. A DC cancellation circuit 8k Gain provides a true differential output swing over a wide range of input current levels, thus reducing pulse-width 450A Peak Input Current distortion. The differential outputs are back-terminated 260ps (max) Deterministic Jitter with 50 per side. The overall transimpedance gain is nominally 8k . For Differential Output Drives 100 Load input signal levels beyond approximately 50Ap-p, the 470MHz Bandwidth amplifier will limit the output swing to 250mV. The MAX3665s low 55nA input noise provides a typical sensitivity of -33.2dBm in 1300nm, 622Mbps receivers. The MAX3665 is designed to be used in conjunction Ordering Information with the MAX3676 clock recovery and data retiming IC with limiting amplifier. Together they form a complete PART TEMP RANGE PIN-PACKAGE 3.3V or 5.0V 622Mbps SDH/SONET receiver. MAX3665EUA -40C to +85C 8 MAX In die form, the MAX3665 is designed to fit on a header MAX3665E/D (see Note) Dice with a PIN diode. It includes a filter connection that pro- Note: Dice are designed to operate over a -40C to +140C vides positive bias for the photodiode through a 1.5k junction temperature (T ) range, but are tested and guaranteed j resistor to V . The device is available in an 8-pin CC at T = +25C. A MAX package. Applications Pin Configuration appears at end of data sheet. SDH/SONET Receivers PIN Photodiode Preamplifiers and Receivers MAX is a registered trademark of Maxim Integrated Products, Inc. Regenerators for SDH/SONET Typical Application Circuit 3.3V 0.01F R FILT V CC MAX3665 1.5k 3.3V FILT C FILT 0.1F 50 OUT+ CLK CLOCK IN AND LIMITING 0.1F DATA 50 AMP RECOVERY DATA OUT- MAX3676 GND 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 AVAILABLE622Mbps, Ultra-Low-Power, 3.3V Transimpedance Preamplifier for SDH/SONET ABSOLUTE MAXIMUM RATINGS V ........................................................................-0.5V to +6.5V Operating Junction Temperature (die) ..............-55C to +150C CC Continuous Current at IN....................................................5mA Processing Temperature (die) .........................................+400C Voltage at OUT+, OUT- ...................(V - 1.5V) to (V + 0.5V) Storage Temperature Range .............................-55C to +150C CC CC Voltage at FILT ...........................................-0.5V to (V + 0.5V) Lead Temperature (soldering, 10s) .................................+300C CC Continuous Power Dissipation (T = +85C) A 8-Pin MAX (derate 4.5mW/C above +85C) ...........295mW 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. DC ELECTRICAL CHARACTERISTICS (V = +3.3V 10% or +5.0V 10%, 100 load between OUT+ and OUT-, T = -40C to +85C. Typical values are at V = +3.3V, CC A CC T = +25C, unless otherwise noted.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Bias Voltage V I = 0 to 300A 0.8 0.95 V IN IN 5 Gain Nonlinearity I = 0 to 10A % IN P-P Supply Current I I = 0 21 30 mA CC IN Small-Signal Transimpedance z Differential output 78 k 21 Output Common-Mode Voltage V - 0.15 V CC Differential Output Offset V I = 300A 5 mV OUT IN Output Impedance (per side) Z 48 50 52 OUT Maximum Output Voltage V I = 450A 260 450 mV OUT(MAX) IN P-P P-P Filter Resistor R 1.5 k FILT AC ELECTRICAL CHARACTERISTICS (V = +3.3V 10% or +5.0V 10%, 100 load between OUT+ and OUT-, source capacitance = 0.5pF, T = -40C to +85C. Typical CC A values are at V = +3.3V, T = +25C, unless otherwise noted.) (Notes 1 and 2) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal Bandwidth BW Relative to gain at 10MHz 404 470 MHz -3dB Low-Frequency Cutoff -3dB with I = 5A 20 40 kHz IN 13 Deterministic Jitter J 2 - 1 PRBS with 100 CIDs 100 260 ps D RMS Noise Referred to Input i 55 72 nA n f < 1MHz, differential referred to output, Power-Supply Rejection Ratio PSRR 36 47 dB V = 30mV (Note 3) CC P-P Note 1: AC characteristics are guaranteed by design. Note 2: Measured with a 3-pole filter at the output. C = 0.5pF, I = 0, C = 1000pF. IN IN FILT Note 3: PSRR = -20log ( V / V ). OUT CC 2 MAX3665