XR-2209 Datasheet, PDF (7/20 Pages) Exar Corporation – Voltage-Controlled Oscillator

XR-2209
Timing Capacitor (Pins 2 and 3)
The oscillator frequency is inversely proportional to the
timing capacitor, C. The minimum capacitance value is
limited by stray capacitances and the maximum value by
physical size and leakage current considerations.
Recommended values range from 100pF to 100mF. The
capacitor should be non-polarized.
25
20
15
Typical
Operating
10
Range
5
0
-5
-10
-15
-20
Negative Supply (V)
Figure 5. Operating Range for Unequal Split Supply Voltages
ÎÎÎÎÎÎÎÎÎÎÎ ³⁵ _{RT=Parallel Combination}
ÎÎÎÎÎÎÎÎÎÎÎ 30
of Activated Timing
Resistors
T_A=25°C
ÎÎÎÎÎÎÎÎÎÎÎ ₂₅
ÎÎÎÎÎÎÎÎÎÎÎ ^RT=2kΩ
R_T=3kΩ
20
R_T=5kΩ
ÎÎÎÎÎÎÎÎÎÎÎ ₁₅
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ₁₀
R_T=20kΩ _{RT=200kΩ}
ÎÎÎÎÎÎÎÎÎÎÎ ₅
R_T=2MΩ
ÎÎÎÎÎÎÎÎÎÎÎ ₀
ÎÎÎÎÎÎÎÎÎÎÎ +4
+6
+8 +10
+12 +14
8 10 12 14 16 18 20 22 24 26 28
Single Supply Voltage (V)
Figure 6. Positive Supply Current, I+ (Measured at Pin 1) vs. Supply Voltage
Rev. 2.02
7