XR2209 データシートの表示（PDF） - Exar Corporation

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XR2209

Voltage-Controlled Oscillator

Exar Corporation 

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

VS = ±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. RL

serves as a pull-up load resistor for this output.

Recommended values for RL 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

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