LTC6990 TimerBlox: Voltage Controlled Silicon Oscillator FEATURES DESCRIPTION n Fixed-Frequency or Voltage-Controlled Operation The LTC 6990 is a precision silicon oscillator with a pro- n Fixed: Single Resistor Programs Frequency with grammable frequency range of 488Hz to 2MHz. It can be <1.5% Max Error used as a fixed-frequency or voltage-controlled oscillator n VCO: Two Resistors Set VCO Center Frequency (VCO). The LTC6990 is part of the TimerBlox family of and Tuning Range versatile silicon timing devices. n Frequency Range: 488Hz to 2MHz A single resistor, R , programs the LTC6990s inter- SET n 2.25V to 5.5V Single Supply Operation nal master oscillator frequency. The output frequency n 72A Supply Current at 100kHz is determined by this master oscillator and an internal n 500s Start-Up Time frequency divider, N , programmable to eight settings DIV n VCO Bandwidth >300kHz at 1MHz from 1 to 128. n CMOS Logic Output Sources/Sinks 20mA 1MHz 50k n 50% Duty Cycle Square Wave Output f = , N = 1, 2, 4 128 OUT DIV n Output Enable (Selectable Low or Hi-Z When Disabled) N R DIV SET n 55C to 125C Operating Temperature Range Optionally, a second resistor at the SET input provides n Available in Low Profile (1mm) SOT-23 (ThinSOT) linear voltage control of the output frequency and can be and 2mm 3mm DFN Package used for frequency modulation. A narrow or wide VCO n AEC-Q100 Qualified for Automotive Applications tuning range can be configured by the appropriate selec- tion of the two resistors. APPLICATIONS The LTC6990 includes an enable function that is synchro- n Low Cost Precision Programmable Oscillator nized with the master oscillator to ensure clean, glitch- n Voltage-Controlled Oscillator free output pulses. The disabled output can be configured n High Vibration, High Acceleration Environments to be high impedance or forced low. n Replacement for Fixed Crystal and Ceramic Oscillators n For easy configuration of the LTC6990, use the TimerBlox Portable and Battery-Powered Equipment LTC6990: Voltage Controlled Oscillator Web-Based All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 6342817, 6614313. Design Tool. TYPICAL APPLICATION Voltage Controlled Oscillator with 16:1 Frequency Range VCO Transfer Function 1000 MHz + f = 2MHz V OUT CTRL V V 750 OE OUT LTC6990 + V 500 + GND V C1 R VCO 0.1F 100k 250 V CTRL SET DIV 6990 TA01a R SET 100k 0 0 0.5 1 1.5 2 V (V) CTRL 6990 TA01b Rev. D 1 Document Feedback For more information www.analog.com f (kHz) OUTLTC6990 ABSOLUTE MAXIMUM RATINGS (Note 1) + Supply Voltage (V ) to GND ........................................6V Specified Temperature Range (Note 3) Maximum Voltage on Any Pin LTC6990C ................................................ 0C to 70C + ............................. (GND 0.3V) V (V + 0.3V) LTC6990I .............................................40C to 85C PIN Operating Temperature Range (Note 2) LTC6990H .......................................... 40C to 125C LTC6990C ............................................40C to 85C LTC6990MP ....................................... 55C to 125C LTC6990I .............................................40C to 85C Junction Temperature ........................................... 150C LTC6990H .......................................... 40C to 125C Storage Temperature Range ..................65C to 150C LTC6990MP ....................................... 55C to 125C Lead Temperature (Soldering, 10sec)....................300C PIN CONFIGURATION TOP VIEW TOP VIEW + V 1 6 OUT OE 1 6 OUT DIV 7 5 GND 2 + GND 2 5 V SET 4 OE 3 SET 3 4 DIV DCB PACKAGE S6 PACKAGE 6-LEAD (2mm 3mm) PLASTIC DFN 6-LEAD PLASTIC TSOT-23 T = 150C, = 64C/W, = 10.6C/W JMAX JA JC T = 150C, = 192C/W, = 51C/W JMAX JA JC EXPOSED PAD (PIN 7) CONNECTED TO GND, PCB CONNECTION OPTIONAL ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC6990CDCB TRMPBF LTC6990CDCB TRPBF LDWX 6-Lead (2mm 3mm) Plastic DFN 0C to 70C LTC6990IDCB TRMPBF LTC6990IDCB TRPBF LDWX 6-Lead (2mm 3mm) Plastic DFN 40C to 85C LTC6990HDCB TRMPBF LTC6990HDCB TRPBF LDWX 6-Lead (2mm 3mm) Plastic DFN 40C to 125C LTC6990CS6 TRMPBF LTC6990CS6 TRPBF LTDWW 6-Lead Plastic TSOT-23 0C to 70C LTC6990IS6 TRMPBF LTC6990IS6 TRPBF LTDWW 6-Lead Plastic TSOT-23 40C to 85C LTC6990HS6 TRMPBF LTC6990HS6 TRPBF LTDWW 6-Lead Plastic TSOT-23 40C to 125C LTC6990MPS6 TRMPBF LTC6990MPS6 TRPBF LTDWW 6-Lead Plastic TSOT-23 55C to 125C AUTOMOTIVE PRODUCTS** LTC6990IS6 WTRMPBF LTC6990IS6 WTRPBF LTDWW 6-Lead Plastic TSOT-23 40C to 85C LTC6990HS6 WTRMPBF LTC6990HS6 WTRPBF LTDWW 6-Lead Plastic TSOT-23 40C to 125C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. 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. D 2 For more information www.analog.com