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零件编号 | XR-2207ID | ||
描述 | Voltage-Controlled Oscillator | ||
制造商 | Exar Corporation | ||
LOGO | |||
1 Page
...the analog plus companyTM
XR-2207
Voltage-Controlled
Oscillator
FEATURES
D Excellent Temperature Stability (20ppm/°C)
D Linear Frequency Sweep
D Adjustable Duty Cycle (0.1% to 99.9%)
D Two or Four Level FSK Capability
D Wide Sweep Range (1000:1 Minimum)
D Logic Compatible Input and Output Levels
D Wide Supply Voltage Range ($4V to $13V)
D Low Supply Sensitivity (0.1% /V)
D Wide Frequency Range (0.01Hz to 1MHz)
D Simultaneous Triangle and Squarewave Outputs
APPLICATIONS
June 1997–3
D FSK Generation
D Voltage and Current-to-Frequency Conversion
D Stable Phase-Locked Loop
D Waveform Generation
– Triangle, Sawtooth, Pulse, Squarewave
D FM and Sweep Generation
GENERAL DESCRIPTION
The XR-2207 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 XR-2207 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; and the
duty cycle of both the triangle and the squarewave
outputs can be varied from 0.1% to 99.9% to generate
stable pulse and sawtooth waveforms.
ORDERING INFORMATION
Part No.
XR-2207M
XR-2207CP
XR-2207D
XR-2207ID
Package
14 Lead 300 Mil CDIP
14 Lead 300 Mil PDIP
16 Lead 300 Mil JEDEC SOIC
16 Lead 300 Mil JEDEC SOIC
Operating
Temperature Range
-55°C to +125°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
BLOCK DIAGRAM
Timing
Capacitor
C1 2
C1 3
Timing
Resistors
R1 4
R2 5
R3 6
R4 7
VCC GND BIAS
1 10
ÎÎÎ VCO
11
A1
A2
Current
Switches
Figure 1. Block Diagram
14 TWO
13 SWO
12 VEE
9 BKI2
8 BKI1
Triangle Wave Out
Square Wave Out
Binary
Keying
Inputs
Rev. 2.02
E1975
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017
1
XR-2207
25
20
15 Typical
Operating
Range
10
5
0
-5 -10 -15 -20
Negative Supply (V)
Figure 5. Operating Range for Unequal Split
Supply Voltages
15
TA=25°C
10
5
0
0 $6 $8 $10 $12 $14
Split Supply Voltage (V)
Figure 7. Negative Supply Current, I-
(Measured at Pin 12) vs. Supply Voltage
35 RT=Parallel Combination
of Activated Timing
30 Resistors
25 TA=25°C
20
RT=2kΩ
15
RT=3kΩ RT=5kΩ
10 RT=200kΩ
RT=20kΩ
RT=2MkΩ
5
0
$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, 1+ (Measured
at Pin 1) vs. Supply Voltage
1MΩ
TA=25°C
100kΩ
10kΩ
1kΩ
0
Timing
Resistor
Range
$4V
$8V
$12V
0 8 16 24
Single Supply Voltage (V)
Figure 8. Recommended Timing Resistor
Value vs. Power Supply Voltage
Rev. 2.02
8
XR-2207
VCC
CB
C
4.7K
VCC
12
3
V+
8
A
9
B
10
GND
C1 C2
XR-2207
13
SWO
14
TWO
BIAS 11
R1 R 2 R3 R 4 V-
4 5 6 7 12
R2 R3
Pulse
Output
Sawtooth
Output
VEE
CB
CB = Bypass Cap
VEE
Figure 18. Duty Cycle Control
Rev. 2.02
16
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页数 | 24 页 | ||
下载 | [ XR-2207ID.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
XR-2207ID | Voltage-Controlled Oscillator | Exar Corporation |
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