MAX3766EEP+ Maxim Integrated Products, MAX3766EEP+ Datasheet
MAX3766EEP+
Specifications of MAX3766EEP+
Related parts for MAX3766EEP+
MAX3766EEP+ Summary of contents
Page 1
... Laser-Fail Indicator with Latched Shutdown ♦ Smooth Laser Start-Up Ordering Information PART TEMP RANGE MAX3766EEP -40°C to +85°C MAX3766EEP+ -40°C to +85°C MAX3766E/D -40°C to +85°C *Dice are designed to operate over this range, but are tested and guaranteed +25°C only. Contact factory for availability. ...
Page 2
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown ABSOLUTE MAXIMUM RATINGS Supply Voltage .................................-0.5V to 7.0V CC CCOUT Voltage at IN+, IN-, ENABLE, SAFETY, FAIL ...........................................-0. Voltage at MOD, BIASMAX, POWERSET, TC ...
Page 3
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown ELECTRICAL CHARACTERISTICS (continued) PARAMETER Monitor-Diode Current Programmable Range Monitor-Diode Bias Voltage Upper MD Voltage for Failure Lower MD Voltage for Failure Range of MD for No Failure REF1 Voltage ...
Page 4
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown (Typical Operating Characteristics are measured on the MAX3766 evaluation kit, V SUPPLY CURRENT vs. TEMPERATURE (EXCLUDES OUTPUT CURRENTS AND I FAIL -40 ...
Page 5
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown (Typical Operating Characteristics are measured on the MAX3766 evaluation kit, V BIAS CURRENT vs. R BIASMAX (NO APC, OPEN-LOOP CONFIGURATION) 100 100 1k 10k R ...
Page 6
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown PIN NAME The current into BIASMAX sets the maximum laser bias current. Connecting BIASMAX directly to REF1 1 BIASMAX allows the largest possible bias current. The resistance (R 2 ...
Page 7
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown VOLTS DIFFERENTIAL INPUT V IN+ V IN- SINGLE-ENDED INPUT V IN+ V IN- RESULTING SIGNAL IN+ IN- I OUT+ Figure 1. Required Input Signal and Output ...
Page 8
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown R 5.1k MOD V CC FAIL MOD REF2 520Ω REFERENCE GENERATOR SAFETY SAFETY FAILURE START-UP ENABLE CIRCUIT SHDN SHDN IN+ IN- MODULATION PECL MIRROR INPUT ...
Page 9
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown Automatic Power Control Transmitters employing a laser with monitor photodiode can use the APC circuit to maintain constant power, regardless of laser threshold changes due to temperature and aging. ...
Page 10
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown FAILURE (INTERNAL 200k SAFETY OPEN COLLECTOR C SAFETY ENABLE 100k Figure 4. Simplified Safety Circuit Schematic Latched Shutdown Configuration This configuration is shown in the Typical Application ...
Page 11
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown ENABLE V ENABLE CC MAX809MEUR-T RESET SAFETY C SAFETY *IN LATCHED SHUTDOWN Figure 6. Reset Pulse Generator If PC board space is not a constraint, Maxim ...
Page 12
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown Set Modulation-Current Tempco Compute the required modulation tempco from the slope efficiency of the laser +25°C and at a hot A temperature. Then select the value ...
Page 13
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown UNCOMPENSATED CORRECTLY COMPENSATED OVERCOMPENSATED 500ps/div Figure 7. Example Laser Compensation Calculate Power Consumption The MAX3766’s junction temperature must be kept below +150°C at all times. Calculate total power dissi- ...
Page 14
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown Table 3. MAX3766 Fault Response in Latched Shutdown Configuration CIRCUIT RESPONSE TO OVERVOLTAGE PIN Depending upon the setting of R BIASMAX there is either no effect latched ...
Page 15
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown PECL OUTPUT 50Ω 68Ω NON- PECL OUTPUT 180Ω 2.87k 10kΩ TTL OR CMOS OUTPUT R3 11.8k SINGLE-ENDED ...
Page 16
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown INPUT PACKAGE V CC 1.5nH 250Ω V IN+ 0.2pF 0.4pF 1.5nH 250Ω V IN- 0.2pF 0.4pF Q1, Q2 INPUT BIAS CURRENT ≅ 1µA Q1, Q2 INPUT ...
Page 17
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown FAILURE-INDICATION CONFIGURATION R POWERSET LATCHED SHUTDOWN CONFIGURATION R BIASMAX R POWERSET R TC ______________________________________________________________________________________ Typical Application Circuits V CC LASER 0.01µ ENABLE OUT- ...
Page 18
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown ___________________Chip Topography IN+ IN- GND MOD GND V CC ENABLE SAFETY FAIL V CCOUT OUT- OUT+ BIAS GNDOUT 0.045" (1.143mm) TRANSISTOR COUNT: 725 SUBSTRATE CONNECTED TO GND AND GNDOUT. ...
Page 19
LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown ________________________________________________________Package Information ______________________________________________________________________________________ 19 ...
Page 20
... Maxim product could create a situation where personal injury or death may occur. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products ...