XR-2209
...the analog plus company
TM
Voltage-Controlled
Oscillator
Rev. 2.02
1975
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 688-7000 FAX (510) 688-7017
1
June 1997–3
FEATURES
Excellent Temperature Stability (20ppm/°C)
Linear Frequency Sweep
Wide Sweep Range (1000:1 Minimum)
Wide Supply Voltage Range (+
4V to +13V)
Low Supply Sensitivity (0.1% /V)
Wide Frequency Range (0.01Hz to 1MHz)
Simultaneous Triangle and Squarewave Outputs
APPLICATIONS
Voltage and Current-to-Frequency Conversion
Stable Phase-Locked Loop
Waveform Generation
Triangle, Sawtooth, Pulse, Squarewave
FM and Sweep Generation
GENERAL DESCRIPTION
The XR-2209 is a monolithic voltage-controlled oscillator
(VCO) integrated circuit featuring excellent frequency
stability and a wide tuning range. The circuit provides
simultaneous triangle and squarewave outputs over a
frequency range of 0.01Hz to 1MHz. It is ideally suited for
FM, FSK, and sweep or tone generation, as well as for
phase-locked loop applications.
The oscillator of the XR-2209 has a typical drift
specification of 20ppm/°C. The oscillator frequency can
be linearly swept over a 1000:1 range with an external
control voltage.
ORDERING INFORMATION
Part No.
Package
Operating
Temperature Range
XR-2209CN 8 Lead 300 Mil CDIP 0° to +70°C
XR-2209M 8 Lead 300 Mil CDIP -55°C to +125°C
XR-2209CP 8 Lead 300 Mil PDIP 0°C to +70°C
BLOCK DIAGRAM
Square Wave Out
Triangle Wave OutTWO
SWO
A1
A2
BIAS
5
7
8
VCO
2
3
1
V
CC
Timing
Capacitor
C1
C2
4
Timing
R
Resistor
6
V
EE
Figure 1. XR-2209 Block Diagram
