MAX3905 MAXIM [Maxim Integrated Products], MAX3905 Datasheet
MAX3905
Related parts for MAX3905
MAX3905 Summary of contents
Page 1
... The power-reduction feature decreases output modulation by approximately 50%. The data squelch feature disables the VCSEL current when no data is present. The MAX3905 is available in die form and operates from -40°C to +140°C junction temperature, over a +3.0V to +5.25V supply range. Optical Transmitters for Automotive Networks Polymer-Clad Silica Fiber-Based Networks +5V AUTOMOTIVE TRANSMITTER (TTL NETWORK CHIP INTERFACE, DATA RATE < ...
Page 2
Automotive VCSEL Driver ABSOLUTE MAXIMUM RATINGS Supply Voltage ..................................-0.5V to +6. Voltage at 3DB, IN+, IN-, IN_TTL, DIFF, OUT, OUT, MOD1, MOD2, DT01, DT02, SQEN, TEMPSENS ..............................................-0. Voltage at LOW1, LOW2, ...
Page 3
Automotive VCSEL Driver ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.25V -40°C to +140°C. Typical values are PARAMETER SYM Modulation Current +25°C J Modulation Current in Low-Power ...
Page 4
... TEMPERATURE 6 TC[ [GND, GND, OPEN] DT0[ [OPEN, OPEN] 5 LOW[ [GND, GND] LOW[ [OPEN, GND LOW[ [GND, OPEN] 1 LOW[ [OPEN, OPEN] 0 -40 - 100 120 140 JUNCTION TEMPERATURE ( ° OPEN 100 120 140 MAX3905 toc03 ...
Page 5
... DETERMINISTIC JITTER vs. JUNCTION TEMPERATURE 120 MOD[ [OPEN, OPEN] 100 MOD[ OPEN MOD[ [OPEN MOD[ 150Mbps K28.5 PATTERN 0 -40 - 100 120 140 JUNCTION TEMPERATURE ( ° C) PULSE-WIDTH DISTORTION MAX3905 toc13 45.1Mbps TTL BIPHASE-CODED DATA 10ns/div ] ...
Page 6
Automotive VCSEL Driver PAD NAME 1, 20 Circuit Ground EE Differential-Input Data Enable. Leave open to enable the TTL data input, or connect to ground to enable 2 DIFF the differential data input. Single-Ended Data Input, TTL. ...
Page 7
... With squelch enabled, the delay of the squelch function is suitable for use with biphase-encoded data (maximum of three consecutive identical digits (CIDs)) or 8B-/10B- encoded data (maximum five CIDs). To use the MAX3905 with scrambled data, disable the squelch function. Inputs DT01 and DT02 are the 2-bit control of the cen- ...
Page 8
Automotive VCSEL Driver I HIGH TC MOD MOD HIGH LOW JUNCTION TEMPERATURE Figure 2. Driver Current and Temperature Coefficient Definitions Table 1. Driver Current and Temperature Coefficient Definitions PARAMETER DESCRIPTION ...
Page 9
... For high-current density and reliable operation, the MAX3905 uses gold metalization. For best results, use gold-wire ball-bonding techniques. Exercise caution when wedge bonding. Die size is 1.52mm x 1.52mm (60 mils x 60 mils), and die thickness is 300µm (12 mils). The bond-pad passivation opening is 93µ ...
Page 10
... Figure 3. IN_TTL Equivalent Input Structure V CC MAX3905 IN+ 5kΩ 1.4V 5kΩ IN- Figure 4. IN+/IN- Equivalent Input Structure 10 ______________________________________________________________________________________ MAX3905 1.5V EE Figure 5. OUT/ OUT Equivalent Output Structure TRANSISTOR COUNT: 985 PROCESS: Silicon Bipolar GST-2 SUBSTRATE: Connected to V DIE SIZE: 1.52mm x 1.52mm (60mils x 60mils) DIE THICKNESS: 300µm (12mils ...
Page 11
... BIAS SET BIAS TEMPERATURE COEFFICIENT TRANSMIT OPTICAL SUBASSEMBLY (TOSA) MODULATION DRIVER T SET CONTROL O 3DB MOD1 MOD2 DT01 DT02 V CC IN_TTL OUT IN+ MAX3905 IN- OUT SQEN V DIFF LOW1 LOW2 TC1 TC2 TC3 EE BIAS SET BIAS TEMPERATURE COEFFICIENT VCSEL INDICATES OPTIONAL WIREBOND CONNECTION VCSEL ...
Page 12
... Orient the die with this pad in the lower-left corner. 12 ______________________________________________________________________________________ Typical Application Circuits (continued) MODULATION DRIVER T CONTROL O 3DB MOD1 MOD2 DT01 DT02 IN_TTL 0.1µF IN+ MAX3905 IN- 0.1µF SQEN DIFF LOW1 LOW2 TC1 TC2 1MΩ GND BIAS SET BIAS TEMPERATURE COEFFICIENT PAD Y 1285 ...
Page 13
Automotive VCSEL Driver V EE (PAD 1) DIFF (PAD 2) IN_TTL (PAD 3) N.C. (PAD 4) 60mils 1.52mm N.C. (PAD 5) N.C. (PAD 6) IN+ (PAD 7) TEMPSENS (PAD 8) Maxim cannot assume responsibility for use of any circuitry ...