Datasheet

DS1090
Low-Frequency, Spread-Spectrum
EconOscillator
6 _____________________________________________________________________
Pin Description
Block Diagram
PIN NAME FUNCTION
1 OUT Oscillator Output
2R
SET
Frequency Control Resistor Input
3V
CC
Positive-Supply Terminal
4 GND Ground
5J0
6J1
Dither Amplitude (Percentage) Inputs
(see Table 2)
7 JC0
8 JC1
Dither Rate Divisor Inputs (see Table 1)
DS1090
GND
MASTER
OSCILLATOR
(VCO)
4MHz–8MHz
FACTORY
PROGRAMMED
PRESCALER
(÷ 1, 2, 4, 8, 16, OR 32)
TRIANGLE
GENERATOR
V
CC
V
CC
R
SET
VOLTAGE-
BIAS CIRCUIT
OUT
f
MOSC
f
OSC
f
MOD
f
OUT
J0
J1
JC0
JC1
BUFFER
+
+
DITHER
AMPLITUDE
(0, 2, 4, OR 8%)
DITHER RATE
(÷ 4, 8, 16, OR 32)
+
-
(÷ 128)
DITHER GENERATOR
∑