LTC6900 Low Power, 1kHz to 20MHz Resistor Set SOT-23 Oscillator FEATURES DESCRIPTION n One External Resistor Sets the Frequency The LTC 6900 is a precision, low power oscillator that is n 1kHz to 20MHz Frequency Range easy to use and occupies very little PC board space. The n 500A Typical Supply Current, V = 3V, 3MHz oscillator frequency is programmed by a single external S n Frequency Error 1.5% Max, 5kHz to 10MHz resistor (R ). The LTC6900 has been designed for high SET (T = 25C) accuracy operation (1.5% frequency error) without the A n Frequency Error 2% Max, 5kHz to 10MHz need for external trim components. (T = 0C to 70C) A The LTC6900 operates with a single 2.7V to 5.5V power n 40ppm/C Temperature Stability supply and provides a rail-to-rail, 50% duty cycle square n 0.04%/V Supply Stability wave output. The CMOS output driver ensures fast rise/fall n 50% 1% Duty Cycle 1kHz to 2MHz times and rail-to-rail switching. The frequency-setting n 50% 5% Duty Cycle 2MHz to 10MHz resistor can vary from 10k to 2M to select a master n Fast Start-Up Time: 50s to 1.5ms oscillator frequency between 100kHz and 20MHz (5V n 100 CMOS Output Driver supply). The three-state DIV input determines whether the n Operates from a Single 2.7V to 5.5V Supply master clock is divided by 1, 10 or 100 before driving the n Low Pro le (1mm) ThinSOT Package output, providing three frequency ranges spanning 1kHz to 20MHz (5V supply). The LTC6900 features a proprietary APPLICATIONS feedback loop that linearizes the relationship between R SET and frequency, eliminating the need for tables to calculate n Portable and Battery-Powered Equipment frequency. The oscillator can be easily programmed using n PDAs the simple formula outlined below: n Cell Phones + n Low Cost Precision Oscillator 100, DIV Pin= V n 20k Charge Pump Driver f = 10MHz ,N= 10, DIV Pin= Open OSC n Switching Power Supply Clock Reference NR SET 1, DIV Pin= GND n Clocking Switched Capacitor Filters n Fixed Crystal Oscillator Replacement L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. n Ceramic Oscillator Replacement All other trademarks are the property of their respective owners. TYPICAL APPLICATION R vs Desired Output Frequency SET 10000 Clock Generator 1kHz f 20MHz OSC 5V 1000 1 5 100 10 1 + V OUT 0.1F LTC6900 2 5V, N = 100 10k R 2M SET GND 100 3 4 SET DIV OPEN, N = 10 N = 1 6900 TA01a 10 20k f = 10MHz OSC () N R SET 1 1k 10k 100k 1M 10M 100M DESIRED OUTPUT FREQUENCY (Hz) 6900 TA01b 6900fa 1 R (k) SETLTC6900 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW + Supply Voltage (V ) to GND .........................0.3V to 6V + + V 1 5 OUT DIV to GND .................................... 0.3V to (V + 0.3V) + GND 2 SET to GND ....................................0.3V to (V + 0.3V) SET 3 4 DIV Operating Temperature Range (Note 8) S5 PACKAGE LTC6900C ............................................40C to 85C 5-LEAD PLASTIC TSOT-23 LTC6900I .............................................40C to 85C T = 150C, = 256C/W JMAX JA Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec)...................300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6900CS5 PBF LTC6900CS5 TRPBF LTZM 5-Lead Plastic TSOT-23 40C to 85C LTC6900IS5 PBF LTC6900IS5 TRPBF LTZM 5-Lead Plastic TSOT-23 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: