
LTC6990
30
6990fc
For more information www.linear.com/LTC6990
LINEAR TECHNOLOGY CORPORATION 2010
LT 0214 REV C PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/2364-16
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
1MHz to 33MHz ThinSOT Silicon Oscillator
Wide Frequency Range
1MHz to 20MHz ThinSOT Silicon Oscillator
Low Power, Wide Frequency Range
10kHz to 1MHz ThinSOT Silicon Oscillator
Micropower, ISUPPLY = 12A at 100kHz
40kHz to 4MHz ThinSOT Silicon Oscillator
Micropower, ISUPPLY = 35A at 400kHz
Fixed Frequency Oscillator, 32.768kHz to 8.192MHz
0.09% Accuracy, 110s Start-Up Time, 105A at 32kHz
TimerBlox, Very Low Frequency Clock with Reset
Cycle Time from 2ms to 9.5 Hours, No Caps, 2.2% Accurate
TimerBlox, Voltage-Controlled Pulse Width Modulator
(PWM)
Simple PWM with Wide Frequency Range
TimerBlox, Monostable Pulse Generator
Resistor Set Pulse Width from 1s to 34sec, No Caps, 3% Accurate
TimerBlox, Delay Block/Debouncer
Resistor Set Delay from 1s to 34sec, No Caps Required, 3% Accurate
TYPICAL APPLICATION
Ultrasonic Frequency Sweep Generator
6990 TA13
LTC6990
OE
GND
SET
OUT
V+
DIV
C1
0.1F
R1
976k
R2
102k
RSET1
49.9k
RSET2
750k
CSET
0.022F
2.25V TO 5.5V
fOUT = 500kHz TO 31.25kHz
OE
74HC125
SWEEPS FROM 500kHz to 31.25kHz IN A
FEW MILLISECONDS (CONTROLLED BY CSET).