MAX24002 1.25Gbps to 2.5Gbps SFP Laser Transceiver General Description Features The MAX24002 is a complete laser driver transmitter 1.25Gbps to 2.5Gbps Limiting Receiver and limiting amplifier receiver for use within fiber optic Integrated APD Bias Loop with Overvoltage and modules for SFP applications. A fully compliant SFP Overcurrent Protection module with digital diagnostics is realized when used OMA-Based LOS Detection with a 2KB EEPROM and suitable optics. Alternatively, a 1.25Gbps to 2.5Gbps Laser Driver microcontroller is used in conjunction with the MAX24002 however, this is not a necessity to achieve SFF-8472 CML, LVPECL-Compatible Inputs compliance. Open and Closed-Loop Bias Control The 2.5Gbps limiting receive path features programmable Temperature-Compensated I Control MOD output swing control, rate selection, and OMA-based High ly Configurable Laser Safety System loss-of-signal detection. Functions are also provided that facilitate the implementation of APD biasing without the SFP MSA and SFF-8472 Digital Diagnostics need for an external DC-DC converter. Integrated Temperature Sensor The laser driver has temperature-compensated modula- External DAC, ADC, and PWM Interfaces tion control using a lookup table. Closed-loop control of laser power incorporates tracking error compensation. Functional Diagram This is linked to a laser safety system which allows the modulation and bias currents to be shut off in response to a range of different fault conditions detected on-chip. 2.5Gbps LIMITING RECEIVER RX IN+ The MAX24002 is highly configurable from either RX OUT+ EEPROM or a low-cost microcontroller using a two-wire RX OUT- interface. RX IN- Applications LOS/SD DAC OC-48, Gigabit Ethernet APD CTRL RSSI ADC Ordering Information appears at end of data sheet. TSENSE TSENSE RET For related parts and recommended products to use with this part, refer SCL SLAVE MPD to www.maximintegrated.com/MAX24002.related. SDA SLAVE SCL MASTER TX DISABLE SDA MASTER TX FAULT BIAS TX IN+ TX OUT+ TX IN- TX OUT- 2.5Gbps CONTINUOUS MODE LASER DRIVER 19-6592 Rev 1 2/14MAX24002 1.25Gbps to 2.5Gbps SFP Laser Transceiver Absolute Maximum Ratings Voltage Range on V , V , Operating Temperature Range ........................... -40C to +95C DD TX DD TXO V , V ......................................... -0.3V to +3.65V Junction Temperature ...................................................... +150C DD RX DD RXO Voltage Range on Any Pin Not Otherwise Storage Temperature ........................................ -70C to +150C Specified (with respect to V )..........-0.5V to (V + 0.5V) Lead Temperatur e (soldering, 10s) ................................. +300C SS DD Continuous Power Dissipation (T = +70C) Soldering Temperature (reflow) ....................................... +260C A TQFN (derate 35.7 mW/C above +70C) ............. 2857.1mW 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. (Note 1) Package Thermal Characteristics TQFN Junction-to-Ambient Thermal Resistance ( ) ....... 59.3C/W JA Junction-to-Case Thermal Resistance ( ) ............ 22.5C/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Recommended DC Operating Conditions (Device not guaranteed to meet parametric specifications when operated beyond these conditions. Permanent damage may be incurred by operating beyond these limits.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage V 3.0 3.3 3.6 V DD V - DD ROSA sourcing to RSSI pin V 0.75 RSSI Pin Compliance ROSA sinking from RSSI Pin 0.75 V BIAS Pin Compliance 0.8 V TX OUT Pin Compliance 0.8 V MPD Input Current For correct APC loop operation 40 2000 A MPD Input Capacitance For correct APC loop operation 4 20 pF Junction Temperature -40 120 C Case Temperature -40 95 C Maxim Integrated 2 www.maximintegrated.com