DS1861B+ Maxim Integrated Products, DS1861B+ Datasheet
DS1861B+
Specifications of DS1861B+
Related parts for DS1861B+
DS1861B+ Summary of contents
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... MOD MODSET TX-D I MODSET N.C. N. BMD A0 I BMD 1nF GND ______________________________________________ Maxim Integrated Products Features Ordering Information TEMP RANGE PIN-PACKAGE -40°C to +95°C 14 TSSOP (173 mils) -40°C to +95°C 14 TSSOP (173 mils) Typical Operating Circuit V CC MAX3736 LASER DRIVER OUT BIAS ...
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Full Laser Control with Fault Management ABSOLUTE MAXIMUM RATINGS Voltage Range SDA, and SCL CC Pins Relative to Ground.....................................-0.5V to +6.0V Voltage Range Tx-Fault, Tx-Disable BIASSET, MODSET, ...
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Full Laser Control with Fault Management ANALOG OUTPUT CHARACTERISTICS (V = +2.85V to 5.5V -40°C to +95°C PARAMETER SYMBOL BIASSET Current Range I BIASSET BIASSET Shutdown Current MODSET Current Range I MODSET MODSET Shutdown Current APC ...
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Full Laser Control with Fault Management FAST ALARMS AND V CC MONITOR CHARACTERISTICS (V = +2.85V to 5.5V -40°C to +95°C PARAMETER SYMBOL High Bias Alarm LSB High Bias Alarm Threshold Accuracy LTXP Alarm Threshold Multiplier ...
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Full Laser Control with Fault Management ELECTRICAL CHARACTERISTICS (continued +2.85V to 5.5V -40°C to +95°C, timing referenced PARAMETER SYMBOL Data Setup Time t Start Setup Time SDA and ...
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Full Laser Control with Fault Management NONVOLATILE MEMORY CHARACTERISTICS (V = +2.85V to 5.5V 0°C to +70°C PARAMETER SYMBOL Writes Note 1: All voltages are referenced to ground. Currents into the IC are positive, out of ...
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Full Laser Control with Fault Management V > POA t POAR TX-D TX-F t INIT:B I BIASSET I MODSET Figure 1. Power-Up Timing with TX-D Not Asserted (Including Hotplug) V > POA TX-D TX-F I BIASSET ...
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Full Laser Control with Fault Management TX BIASSET OFF I MODSET t OFF *TX-F WILL ASSERT IF THE HTXP ALARM IS TRIGGERED WHILE THE BIAS CURRENTS ARE DISABLED. THE LTXP ALARM IS MASKED WHILE TX-D IS ...
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Full Laser Control with Fault Management OCCURENCE OF FAULT TX-D TX-F I BIASSET I MODSET Figure 5. Successful Recovery from Transmitter Safety Fault Condition OCCURENCE OF FAULT TX-D TX-F I BIASSET I MODSET Figure 6. Unsuccessful Recovery from Transmitter Safety ...
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Full Laser Control with Fault Management (V = +5.0V +25°C, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE 6.9 DPOL = +85°C A DPOL = +25°C A DPOL = 0, ...
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Full Laser Control with Fault Management PIN NAME Serial Data Input/Output SDA logic levels. 2 SCL Serial Clock Input. I Transmit Fault Output. Open-collector output that indicates an alarm condition has occurred. A pullup 3 TX-F resistor is ...
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Full Laser Control with Fault Management V CC USER EEPROM (8 BYTES SDA 2 I C-COMPATIBLE INTERFACE SCL WITH SETTINGS PASSWORD A PROTECTION TX-D TX-F GND Detailed Description Automatic Power Control The DS1861 ...
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Full Laser Control with Fault Management Reading the BIASSET and MODSET The I and I currents are generated by BIASSET MODSET embedded 18-bit and 12-bit DACs, respectively, and their output currents can be read when the DS1861 has been halted ...
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Full Laser Control with Fault Management I DIST 1 f ERU TIME Figure 9. BMD Disturbance Current MOD 2 AVERAGE POWER MOD I I APC TH CURRENT (mA) Figure 10. Laser Diode Bias ...
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Full Laser Control with Fault Management Figure 11 shows the extinction ratios (expressed in decibels function of N for several A Note the actual extinction ratio value is determined by the ratio addition to N. ...
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Full Laser Control with Fault Management 144 INVALID ER 128 SETTINGS SHADED 112 INVALID REGISTER SETTING (DECIMAL) Figure 12. Setting N Using the ER Register LTXP ALARM LTXP ENABLE HTXP ...
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Full Laser Control with Fault Management 2 communicate over the I C bus and for the analog cir- cuitry to function properly. The first monitoring level, the power-on digital voltage (V ), inhibits the part’s I POD functionality when V ...
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Full Laser Control with Fault Management WORD 0 BASE ROW ADDR NAME BYTE 0/8 BYTE 1/9 Password 78h Status SRAM Entry B0h APC Config User EE User EE HTXP B8h Fast Comp Threshold Threshold C0h Password Reserved Reserved I BIASSET ...
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Full Laser Control with Fault Management Detailed Register Description Conventions Name of Row • Name of Byte...<Write Access><Volatility><Power- Up/Factory Default Value> 0. Name of bit 0.....Bit 0 Description 1. Name of bit 1.....Bit 1 Description Bit names.....Bit ...
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Full Laser Control with Fault Management < > + RSEL = < > RSEL The default setting 1Ch corresponds ...
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Full Laser Control with Fault Management The following terminology is commonly used to 2 describe I C data transfers. Master Device: The master device controls the slave devices on the bus. The master device generates SCL clock pulses, and start ...
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Full Laser Control with Fault Management Byte Write: A byte write consists of 8 bits of informa- tion transferred from the master to the slave (most sig- nificant bit first) plus a 1-bit acknowledgement from the slave to the master. ...
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Full Laser Control with Fault Management can result in a whole row being worn out over time by writing a single byte repeatedly. Writing a row one byte at a time will wear out the EEPROM eight times faster than ...
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Full Laser Control with Fault Management Applications Information Calibrating APC and Extinction Ratio Before calibrating, the APC register should be set to a low value to ensure the laser’s maximum power level is not exceeded before the power level is ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 25 © 2005 Maxim Integrated Products is a registered trademark of Dallas Semiconductor Corporation ...