DC2073B-B

LTC1799 1kHz to 33MHz Resistor Set SOT-23 Oscillator FEATURES DESCRIPTION n One External Resistor Sets the Frequency The LTC 1799 is a precision oscillator that is easy to use n Fast Start-Up Time: <1ms and occupies very little PC board space. The oscillator n 1kHz to 33MHz Frequency Range frequency is programmed by a single external resistor n Frequency Error 1.5% 5kHz to 20MHz (R ). The LTC1799 has been designed for high accuracy SET (T = 25C) operation (1.5% frequency error) without the need for A n Frequency Error 2% 5kHz to 20MHz external trim components. (T = 0C to 70C) A The LTC1799 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 0.05%/V Supply Stability wave output. The CMOS output driver ensures fast rise/ n 50% 1% Duty Cycle 1kHz to 2MHz fall times and rail-to-rail switching. The frequency-setting n 50% 5% Duty Cycle 2MHz to 20MHz resistor can vary from 3k to 1M to select a master oscil- n 1mA Typical Supply Current lator frequency between 100kHz and 33MHz (5V supply). n 100 CMOS Output Driver The three-state DIV input determines whether the master n Operates from a Single 2.7V to 5.5V Supply clock is divided by 1, 10 or 100 before driving the out- n Low Profile (1mm) SOT-23 (ThinSOT Package) put, providing three frequency ranges spanning 1kHz to n AEC-Q100 Qualified for Automotive Applications 33MHz (5V supply). The LTC1799 features a proprietary feedback loop that linearizes the relationship between R SET and frequency, eliminating the need for tables to calculate APPLICATIONS frequency. The oscillator can be easily programmed using n Low Cost Precision Oscillator the simple formula outlined below: n Switching Power Supply Clock Reference n Clocking Switched Capacitor Filters + DIV Pin = V 100, n Fixed Crystal Oscillator Replacement 10k n f = 10MHz , N = 10, Ceramic Oscillator Replacement DIV Pin = Open OSC N R SET All registered trademarks and trademarks are the property of their respective owners. Protected 1, DIV Pin = GND by U.S. Patents including 6342817 and 6614313. Typical Distribution of Frequency Error, + TYPICAL APPLICATION T = 25C (5kHz f 20MHz, V = 5V) A OSC 25 Basic Connection 20 1kHz f 33MHz OSC 5V 1 5 + V OUT 15 0.1F LTC1799 2 5V 3k R 1M SET GND 100 3 4 10 10 SET DIV OPEN 1 1799 TA01 5 0 TSOT-23 Actual Size 1.25 0.75 0.25 0 0.25 0.75 1.25 FREQUENCY ERROR (%) 1799 TA02 Rev. E 1 Document Feedback For more information www.analog.com UNITS (%)LTC1799 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 S5 PACKAGE LTC1799C ................................................ 0C to 70C 5-LEAD PLASTIC TSOT-23 T = 150C, = 256C/W LTC1799I .............................................40C to 85C JMAX JA LTC1799H .......................................... 40C to 125C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C ORDER INFORMATION TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1799CS5 TRMPBF LTC1799CS5 TRPBF LTND 5-Lead Plastic TSOT-23 0C to 70C LTC1799IS5 TRMPBF LTC1799IS5 TRPBF LTNE 5-Lead Plastic TSOT-23 40C to 85C LTC1799HS5 TRMPBF LTC1799HS5 TRPBF LTND 5-Lead Plastic TSOT-23 40C to 125C AUTOMOTIVE PRODUCTS** LTC1799IS5 WTRMPBF LTC1799IS5 WTRPBF LTNE 5-Lead Plastic TSOT-23 40C to 85C LTC1799HS5 WTRMPBF LTC1799HS5 WTRPBF LTND 5-Lead Plastic TSOT-23 40C to 125C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Contact the factory for parts specified with wider operating temperature ranges. Contact the factory for information on lead based finish parts. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. **Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for thesemodels. Rev. E 2 For more information www.analog.com