XR-2209 Datasheet, PDF (9/20 Pages) Exar Corporation – Voltage-Controlled Oscillator

XR-2209
1.04
RT = 2MΩ
1.02
1.00
RT = 20kΩ
RT = 200kΩ
.98
.96
TA = 25°C
RT = Total
.94
Timing
Resistance
C = 5000pF
RT = 2kΩ
.92
±2 ±4
±6
±8 ±10 ±12 ±14
Split Supply Voltage (V)
4
8
12
16
20
24
28
Single Supply Voltage (V)
Figure 10. Frequency Drift vs. Supply Voltage
+2
+1
4kΩ ^2kΩ
0
20kΩ
-1 _200kΩ
-2
V_S = ±6V
C = 5000pF
200kΩ ^2MΩ
20kΩ _4kΩ
R = 2kΩ
2MΩ
-3
-50 -25
0 +25 +50 +75 +100 +125
Temperature (°C)
Figure 11. Normalized Frequency Drift with Temperature
Squarewave Output (Pin 7)
The squarewave output at pin 7 is an “open-collector”
stage capable of sinking up to 20mA of load current. R_L
serves as a pull-up load resistor for this output.
Recommended values for R_L range from 1kW to 100kW.
Triangle Output (Pin 8)
The output at pin 8 is a triangle wave with a peak swing of
approximately one-half of the total supply voltage. Pin 8
has a 10W output impedance and is internally protected
against short circuits.
Rev. 2.02
9