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XR-2207D 데이터시트 PDF




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부품번호 XR-2207D 기능
기능 Voltage-Controlled Oscillator
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XR-2207D 데이터시트, 핀배열, 회로
...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-2207D pdf, 반도체, 판매, 대치품
XR-2207
ELECTRICAL CHARACTERISTICS (CONT’D)
Parameters
Output Characteristics
Triangle Output
Amplitude
Impedance
DC Level
Linearity
Squarewave Output
Amplitude
Saturation Voltage
Rise Time
Fall Time
XR-2207ID/XR-2207M
Min. Typ. Max.
XR-2207CP/D
Min. Typ. Max.
Units Conditions
46
10
+100
0.1
11 12
0.2 0.4
200
20
46
10
+100
0.1
11 12
0.2 0.4
200
20
VPP
mV
%
Vpp
V
nsec
nsec
Measured at Pin 13
Referenced to Pin 10
From 10% to 90% to Swing
Measured at Pin 13, S2
Closed
Referenced to Pin 12
CL  10pF
CL  10pF
Notes
Bold face parameters are covered by production test and guaranteed over operating temperature range.
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V
Storage Temperature Range . . . . . -65°C to +150°C
Power Dissipation (package limitation)
Ceramic package . . . . . . . . . . . . . . . . . . . . . . . 750mW
Derate above +25°C . . . . . . . . . . . . . . . . . . 6mW/°C
Plastic package . . . . . . . . . . . . . . . . . . . . . . . . . 625mW
Derate above +25°C . . . . . . . . . . . . . . . . . . 5mW/°C
SOIC package . . . . . . . . . . . . . . . . . . . . . . . . . 500mW
Derate above +25°C . . . . . . . . . . . . . . . . . 4mW/°C
Rev. 2.02
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XR-2207D 전자부품, 판매, 대치품
XR-2207
VCC
VCC
S2
I+ C
0.1µF
12
3
Binary
8
A
Keying Inputs 9 B
V+ C1
C2
XR-2207
10
GND
SWO 13
14
TWO
11
BIAS
R1 R2 R3 R4 V-
4 5 6 7 12
I-
R1 R2 R3 R4
RL
Square Wave
Output
Triangle Wave
Output
VEE
0.1µF
S1
Figure 4. Test Circuit for Split Supply Operation
OPERATING CONSIDERATIONS
Supply Voltage (Pins 1 and 12)
The XR-2207 is designed to operate over a power supply
range of $4V to $13V for split supplies, or 8V to 26V for
single supplies. Figure 5 shows the permissible supply
voltage for operation with unequal split supply voltages.
Figure 6 and Figure 7 show supply current versus supply
voltage Performance is optimum for $6V split supply, or
12V single supply operation. At higher supply voltages,
the frequency sweep range is reduced.
Ground (Pin 10)
For split supply operation, this pin serves as circuit
ground. For single supply operation, pin 10 should be AC
grounded through a 1µF bypass capacitor. During split
supply operation, a ground current of 2IT flows out of this
terminal, where IT is the total timing current.
Bias for Single Supply (Pin 11)
For single supply operation, pin 11 should be externally
biased to a potential between V+/3 and V+/2V (see
Figure 3). The bias current at pin 11 is nominally 5% of the
total oscillation timing current, IT.
Bypass Capacitors
The recommended value for bypass capacitors is 1µF
although larger values are required for very low frequency
operation.
Timing Resistors (Pins 4, 5, 6, and 7)
The timing resistors determine the total timing current, IT,
available to charge the timing capacitor. Values for timing
resistors can range from 2kto 2M; however, for
optimum temperature and power supply stability,
recommended values are 4kto 200k(see Figure 8,
Figure 9, Figure 10 and Figure 11). To avoid parasitic pick
up, timing resistor leads should be kept as short as
possible. For noisy environments, unused or deactivated
timing terminals should be bypassed to ground through
0.1µF capacitors.
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 100µF. The
capacitor should be non-polarized.
Rev. 2.02
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