LTC6905 Linear Technology, LTC6905 Datasheet
LTC6905
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LTC6905 Summary of contents
Page 1
... The LTC6905 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. Operation is simple: A ...
Page 2
... GND ........................– 0. DIV to GND .................................... – 0. SET to GND ................................... – 0. Output Short-Circuit Duration (Note 6) ........... Indefinite Operating Temperature Range (Note 7) LTC6905C, I ....................................... – 40°C to 85°C LTC6905H ........................................ – 40°C to 125°C Specified Temperature Range (Note 8) www.DataSheet4U.com LTC6905C ............................................... 0°C to 70°C LTC6905I .............................................–40°C to 85°C LTC6905H .........................................– ...
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... QA sampled at these temperatures. The LTC6905I-XXX is guaranteed to meet specified performance from –40°C to 85°C. Note 9: The LTC6905 is optimized for the performance with a 3V power supply voltage. Please consult LTC Marketing for parts optimized for 5V operation. ...
Page 4
... Floating Pin 4 divides the master oscillator by 2. Pin 4 should be tied to GND for the ÷4 setting, the lowest frequency range. To detect a floating DIV pin, the LTC6905 attempts to pull the pin toward midsupply. This is realized with two internal current sources, one tied to V ground and Pin 4 ...
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... V – BIAS www.DataSheet4U.com + GND 2 THEORY OF OPERATIO As shown in the Block Diagram, the LTC6905’s master oscillator is controlled by the ratio of the voltage between + the V and SET pins and the current entering the SET pin (I ). The voltage on the SET pin is forced to approxi- RES + ...
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... JITTER AND POWER SUPPLY NOISE If the LTC6905 is powered by a supply that has frequency contents equal to the output frequency then the oscillators jitter may increase. In addition, power supply ripple in excess of 20mV at any frequency may increase jitter. ...
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... DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 The resistor ground plane is used, the connection of the LTC6905 and the SET U S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) ...
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... SET pin (Pin 3). The accuracy of the programming is best with a simple resistor because the LTC6905 takes into account both the voltage at the SET pin and the current into the SET pin when generating the output frequency. Since the voltage at the SET pin can vary www ...