Datasheet

LTC6990
23
6990fc
For more information www.linear.com/LTC6990
TYPICAL APPLICATIONS
Speaker Alarm. Modulate Tone with R
VCO
within 500Hz to 8kHz Span
6990 TA05
LTC6990
OE
GND
SET
OUT
V
+
DIV
1M
887k97.6k
STEP
RAMP
5V
5V
R
VCO
20k
5V
50k
8Ω
2N2222
IN4004
Overvoltage Detector/Alarm. Direct Drive of Piezo Alarm
6990 TA06
LTC6990
5V
24V
OE
GND
SET
OUT
V
+
DIV
1M
PIEZO ALARM
4kHz
MURATA
PKM29-3A0
100k
523k392k
R
B
10.7k
R
A
787k
5V
400mV
–
+
LT6703-3
V
ALARM
= 400mV 1+
R
A
R
B






= 30V