RM2207D/883B [RAYTHEON]
Voltage Controlled Oscillator; 压控振荡器
| 型号： | RM2207D/883B |
| 厂家： | 
RAYTHEON COMPANY |
| 描述： | Voltage Controlled Oscillator |
| 文件： | 总12页 (文件大小：76K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Electronics
Semiconductor Division
RC2207
Voltage Controlled Oscillator
Features
Description
• Excellent temperature stability — 20 ppm/°C
• Linear frequency sweep
• Adjustable duty cycle — 0.1% to 99.9%
• Two or four level FSK capability
The RC2207 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 0.01 Hz to 1 MHz. It is ideally suited for
FM, FSK and sweep or tone generation as well as for
phase-locked loop applications.
• Wide sweep range — 1000:1 min.
• Logic compatible input and output levels
• Wide supply voltage range — ±4V to ±13V
• Low supply sensitivity ±0.15%/V
• Wide frequency range — 0.01 Hz to 1 MHz
• Simultaneous triangle and squarewave outputs
As shown in the Block Diagram, the circuit is comprised of
four functional blocks: a variable-frequency oscillator which
generates the basic periodic waveforms; four current
switches actuated by binary keying inputs; and buffer
amplifiers for both the triangle and squarewave outputs.
The internal switches transfer the oscillator current to any
of four external timing resistors to produce four discrete
frequencies which are selected according to the binary logic
levels at the keying terminals (pins 8 and 9).
Applications
• FSK generation
• Voltage and current-to-frequency conversion
• Stable phase-locked loop
• Waveform generation triangle, sawtooth, pulse,
squarewave
• FM and sweep generation
The RC2207 has a typical drift specification of 20 ppm/°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.
Block Diagram
TRIANGLE WAVE OUTPUT
SQUARE WAVE OUTPUT
A1
A2
TIMING CAPACITOR
VCO
–V
S
CURRENT
SWITCH
BINARY KEY INPUTS
TIMING RESISTORS
R1-R4
65-2207-01
Rev. 1.0.0
RC2207
PRODUCT SPECIFICATION
Pin Assignments
+V
S
1
2
3
4
5
6
7
14
Trianglewave Output
Squarewave Output
13
Timing
Capacitor
12
+V
S
R1
R2
11
Bias
10
GND
Timing
Resistors
Binary
Keying
Inputs
9
8
R3
R4
65-2207-02
Pin Descriptions
Pin Name
Pin Number
Pin Function Description
For single supply operations, pin 11 should be externally biased to a
potential between +V /3 and +V /2 (see Figure 8). The bias current at pin
Bias for Single
Supply
11
8, 9
10
S
S
11 is nominally 5% of the total oscillation timing current I .
T
Binary Keying
Inputs
The internal impedance at these pins is approximately 5 kΩ. Keying levels
are <1.4V for zero and > 3V for one logic levels referenced to the DC voltage
at pin 10.
Ground
For split supply operation, this pin serves as circuit ground. For single supply
operation, pin 10 should be AC grounded through a 1 µF bypass capacitor.
During split supply operation, a ground current of 2 I flows out of this
T
terminal, where I is the total timing current.
T
Squarewave
Output
13
The squarewave output at pin 13 is an open-collector stage capable of
sinking up to 20 mA of load current. R serves as a pull-up load resistor for
L
this output. Recommended values for R range from 1 kΩ to 10 kΩ
L
Supply Voltage
1, 12
The RC2207 is designed to operate over a power supply range of +4V to
±13V for split supplies, or 8V to 26V for single supplies. At high supply
voltages, the frequency sweep range is reduced. Performance is optimum
for ±6V, or 12V single supply operation.
(+V , –V )
S
S
Timing Capacitor
2, 3
4–7
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 100 pF to 100 µF. The capacitor should
be non-polarized.
Timing Resistors
(R1–R4)
The timing resistors determine the total timing current, I , available to
T
charge the timing capacitor. Values for timing resistors can range from 1.5
kΩ to 2 MΩ; however, for optimum temperature and power supply stability,
recommended values are 4 kΩ to 200 kΩ. To avoid parasitic pick up, timing
resistor leads should be kept as short as possible. For noise environments,
unused or deactivated timing terminals should be bypassed to ground
through 0.1 µF capacitors. Otherwise, they may be left open.
Trianglewave
Output
14
The output at pin 14 is a trianglewave with a peak swing of approximately
one-half of the total supply voltage. Pin 14 has a very low output impedance
of 10Ω and is internally protected against short circuits.
Notice that the triangle waveform linearity is sensitive to parasite coupling
between the square and the trianglewave outputs (pins 13 and 14). In board
layout or circuit wiring, care should be taken to minimize stray wiring
capacitance between those pins.
2
PRODUCT SPECIFICATION
RC2207
Absolute Maximum Ratings
Parameter
Min.
Max.
+26
Units
Supply Voltage
V
V
Storage Temperature Range
Operating Temperature Range
Lead Soldering Temperature (60 seconds)
-65
-55
+150
+125
+300
°C
°C
Thermal Characteristics
Ceramic DIP
+175°C
SOIC
Plastic DIP
+125°C
Maximum Juncton Temperature
+125°C
300 mW
60°C/W
200°C/W
Maximum P T < 50°C
1042 mW
60°C/W
468 mW
D
A
Thermal Resistance, θ
Thermal Resistance, θ
60°C/W
JC
JA
120°C/W
8.33 mW/°C
160°C/W
6.25 mW/°C
For T > 50°C Derate at
5.0 mW/°C
A
3
RC2207
PRODUCT SPECIFICATION
Electrical Characteristics
(Test Circuit of Figure 1, V = ±6V, T = +25°C, C = 5000 pF, R1= R2 = R3 = R4 = 20 kΩ, R = 4.7Ω binary inputs
S
A
L
grounded, S1 and S2 closed unless otherwise specified)
Parameters
Test Conditions
Min.
Typ.
Max. Units
General Characteristics
Supply Voltage Single Supply
See Typical Performance
Characteristics
+8.0
+12
+26
V
Split Supplies
±4
±6
±13
V
Supply Current Single Supply
Measured at pin 1,
5.0
7.0
mA
S1 open (See Fig. 8)
Split
Supplies
Positive
Measured at pin 1,
S1 open (See Fig. 7)
RC2207
5.0
4.0
7.0
8.0
7.0
6.0
mA
mA
RM2207
RC2207
RM2207
Negative
Measured at pin 12,
S1, S2 open
Binary Keying Inputs
Switching Threshold
Measured at pins 8 and 9.
Refer to pin 10.
1.4
0.5
2.2
5.0
2.8
V
Input Resistance
kΩ
Oscillator Section—Frequency Characteristics
Upper Frequency Limit
Lower Practical Frequency
Frequency Accuracy
C = 500 pF, R3 = 2 kΩ
C = 50 µF, R3 = 2 kΩ
1.0
0.01
±1.0
0.5
MHz
Hz
±3.0 % of f
0
0
Frequency Matching
% of f
Frequency
Stability
vs. Temperature (Note 1) 0°C < T < +70°C
20
50 ppm/°C
A
vs. Supply Voltage
0.15
%/V
Sweep Range
R3 = 1.5 kΩ for f
1000:1 3000:1
f /f
H L
H
R3 = 2 MΩ for f
L
Sweep Linearity
C = 5000 pF
10:1 Sweep1
f
H
f
H
= 10 kHz, f = 1 kHz
1.0
2.0
%
%
L
1000:1 Sweep
= 100 kHz, f = 100 Hz
5.0
L
FM Distortion
±10% FM Deviation
0.1
%
Recommended Range of Timing Resistors See Characteristic Curves
1.5
75
10
2000
kΩ
Ω
Impedance at Timing Pins
DC Level at Timing Terminals
Output Characteristics
Triangle output Amplitude
Impedance
Measured at pins 4, 5, 6, or 7
mV
Measured at pin 14
4
6
10
V
P-P
Ω
DC Level
Referenced to pin 10
+100
0.1
12
mV
%
Linearity
from 10% to 90% of swing
Squarewave
Output
Amplitude
Measured at pin 13,
S2 Closed
11
V
P-P
Saturation Voltage
Rise Time
Referenced to pin 12
0.2
200
20
0.4
V
C ≤ 10 pF
L
ns
ns
Fall Time
C ≤ 10 pF
L
Note:
1. Guaranteed by design.
4
PRODUCT SPECIFICATION
RC2207
Typical Performance Characteristics
7
6
5
4
3
2
1
0
+25
+20
+15
V
= +6V
S
C = 5000 pF
Typical
-1
-2
-3
-4
-5
-6
-7
Operating
Range
+10
+5
0
0
-5
-10
-15
-20
1K
10K
100K
Timing Resistance (Ω)
1M
10M
Negative Supply (V)
Figure 1. Typical Operating Range for
Split Supply Voltage
Figure 2. Frequency Accuracy vs. Timing Resistance
1.04
10M
1M
R
= 2 MΩ
T
T
= +25°C
A
R
T
= 20 kΩ
1.02
1.00
0.98
0.96
0.94
0.92
R
= 200 kΩ
T
Timing
Resistor
Range
100K
10K
1K
T
= +20°C
A
R
= Total Timing Resistance
T
C = 5000 pF
R
= 2 kΩ
T
0
0
4
8
8
12
16
2
4
4
6
8
10
12
20
14
22
Split Supply Voltage (V)
Split Supply Voltage (V)
16
24
32
8
12
14
18
Single Supply Voltage (V)
Single Supply Voltage (V)
1
R
T
= Parallel Combination of Activated Timing Resistors
Figure 3. Recommended Timing Resistor Value vs.
Power Supply Voltage
Figure 4. Normalized Frequency Drift vs.
Supply Voltage
+2
+1
0
V
= +6V
S
2 MΩ
200 kΩ
C = 5000 pF
4 kΩ
2 kΩ
20 kΩ
2 kΩ
4 kΩ
-1
-2
-3
200 kΩ
R = 2 kΩ
2 MΩ
-75
-50
-25
0
+25 +50
+75 +100 +125
Temperature (°C)
Figure 5. Pulse and Sawtooth Outputs
Figure 6. Normalized Frequency Drift vs. Temperature
5
RC2207
PRODUCT SPECIFICATION
Table 1. LogicTable for Binary Keying Controls
Applications Information
Logic
Level
Selected
Timing
Pins
Precautions
The following precautions should be observed when
operating the RC2207 family of integrated circuits:
8
0
0
9
6
1
Frequency
Definitions
f1
f = 1/R3C ∆f1 = 1/R4C
1
• Pulling excessive current from the timing terminals will
adversely affect the temperature stability of the circuit. To
minimize this disturbance, it is recommended that the
total current drawn from pins 4, 5, 6 and 7 be limited to <6
mA. In addition, permanent damage to the device may
occur if the total timing current exceeds 10 mA.
• Terminals 2, 3, 4, 5, 6 and 7 have very low internal
impedance and should, therefore, be protected from
accidental shorting to ground or the supply voltages.
• The keying logic pulse amplitude should not exceed the
supply voltage.
6 & 7
f + ∆f
f = 1/R2C,
2
∆f = 1/R1C
1
1
2
1
0
5
f2
Logic levels:
0 = Ground
14 &5 f2 + f∆2 Logiclevels: 1 = ≥3V
Note:
1. For single supply operation, logic levels are referenced to
voltage at pin 10.
The squarewave output is obtained at pin 13 and has a
peak-to-peak voltage swing equal to the supply voltages.
This output is an open-collector type and requires an
external pull-up load resistor (nominally 5 kΩ) to the posi-
tive supply. The triangle waveform obtained at pin 14 is cen-
Split Supply Operation
Figure 7 is the recommended circuit connection for split
supply operation. The frequency of operation is determined
by the timing capacitor (C) and the activated timing resistors
(R1 through R4). The timing resistors are activated by the
logic signals at the binary keying inputs (pins 8 and 9), as
shown in Table 1. If a single timing resistor activated, the
frequency is 1/RC.
tered about ground and has a peak amplitude of +V /2.
S
The circuit operates with supply voltages ranging from ±4V
to it ±13V. Minimum drift occurs with ±6V supplies.
Single Supply Operation
Otherwise, the frequency is either 1/(R1| |R2)C or
1/(R1| |R4)C.
The circuit should be interconnected as shown in Figure 8
for single supply operation. Pin 12 should be grounded, and
pin 11 biased from +V through a resistive divider to a value
S
of bias voltage between +V /3 and +V /2. Pin 10 is
S
S
bypassed to ground through a 0.1µF capacitor.
0.1 µF
+VS
S2
C
IS+
Binary Keying
Inputs
+VS
RL
9
8
1
2
3
10
11
Squarewave
Output
13
14
RC2207
Device
Under Test
Trianglewave
Output
12
IS-
6
7
4
5
0.1 µF
R3
R4
R1
R2
-VS
S1
65-2207-09
Note: This circuit is for Bench Tests only. DC testing is normally performed
with automated test equipment using an equivalent circuit.
Figure 7. Test Circuit for Split Supply Operation
6
PRODUCT SPECIFICATION
RC2207
0.1 µF
+VS
C
S2
IS
Binary Keying
Inputs
+VS
RL
9
8
1
2
3
0.1 µF
10
11
Squarewave
Output
13
14
RC2207
Device
Under Test
3.9K
Trianglewave
Output
12
6
7
4
5
5.1K
R3
R4
R1
R2
S1
+VS
65-2207-10
Figure 8. Test Circuit for Single Supply Operation
For single supply operation, the DC voltage at pin 10 and the
timing terminals (pins 4 through 7) are equal and approxi-
mately 0.6V above V , the bias voltage at pin 11 . The logic
B
levels at the binary keying terminals are referenced to the
voltage at pin 10.
Pulse and Sawtooth Operation
The duty cycle of the output waveforms can be controlled by
frequency shift keying at the end of every half cycle of
oscillator output. This is accomplished by connecting one or
both of the binary keying inputs (pin 8 or 9) to the square-
wave output at pin 13. The output waveforms can then be
converted to positive or negative pulses and sawtooth
waveform.
On-Off Keying
The RC2207 can be keyed on and off by simply activating an
open circuited timing pin. Under certain conditions, the cir-
cuit may exhibit very low frequency (<1 Hz) residual oscilla-
tion in the off state due to internal bias current. If this effect
is undesirable, it can be eliminated by connecting a 10 MΩ
Figure 10 is the recommended circuit connection for duty
cycle control. Pin 8 is shorted to pin 13 so that the circuit
switches between the 0 0 and the 1 0 logic states given in
Table 1. Timing pin 5 is activated when the output is high,
and pin 6 is activated when the squarewave output goes to a
low state.
resistor from pin 3 to + V .
S
Frequency Control (Sweep and FM)
The frequency of operation is controlled by varying the total
timing current, I , drawn from the activated timing pin 4, 5,
T
The duty cycle of the output waveforms given as:
6 or 7. The timing current can be modulated by applying a
R2
Duty Cycle = --------------------
R2 + R3
control voltage, V , to the activated timing pin through a
C
series resistor R as shown in Figure 9.
C
and can be varied from 0.1% to 99.9% by proper choice of
timing resistors. The frequency of oscillation, f, is given as:
For split supply operation, a negative control voltage, V ,
C
applied to the circuit of Figure 9 causes the total timing
current, I , and the frequency, to increase.
T
2
1
--- --------------------
f =
C R2 + R3
As an example, in the circuit of Figure 9, the binary keying
inputs are grounded. Therefore, only timing pin 6 is
activated.
The frequency can be modulated or swept without changing
the duty cycle by connecting R2 and R3 to a common control
voltage V instead of to -V . The sawtooth and the pulse
The frequency of operation determined by:
C
S
output waveforms are shown in the Typical Performance
Characteristics Graphs.
V C R3
1
--------------
R3CB
f =
1 – --------------------------- Hz
(RC)(–VC)
7
RC2207
PRODUCT SPECIFICATION
9
10
12
RC2207
5
6
8
13
14
IC
IT
RC2207
Sawtooth
Output
VC
RC
R2
R3
IO
R3
12
8
9
4.7K
-VS
Pulse
Output
CO
-VS
65-2207-12
+VS
CB
65-2207-11
Figure 9. Frequency Sweep Operation
Figure 10. Pulse and Sawtooth Generation
8
PRODUCT SPECIFICATION
RC2207
Mechanical Dimensions
14-Lead SOIC
Notes:
Inches
Millimeters
Symbol
Notes
1. Dimensioning and tolerancing per ANSI Y14.5M-1982.
Min.
Max.
Min.
Max.
2. "D" and "E" do not include mold flash. Mold flash or protrusions
shall not exceed .010 inch (0.25mm).
A
.053
.004
.013
.008
.336
.150
.069
.010
.020
.010
.345
.158
1.35
0.10
0.33
0.19
8.54
3.81
1.75
0.25
0.51
0.25
8.76
4.01
A1
B
3. "L" is the length of terminal for soldering to a substrate.
4. Terminal numbers are shown for reference only.
5. "C" dimension does not include solder finish thickness.
6. Symbol "N" is the maximum number of terminals.
C
D
E
5
2
2
e
.050 BSC
1.27 BSC
H
h
.228
.010
.016
.244
.020
.050
5.79
0.25
0.40
6.20
0.50
1.27
L
3
6
N
α
14
14
0°
8°
0°
8°
ccc
—
.004
—
0.10
14
8
E
H
1
7
h x 45°
D
C
A1
A
α
SEATING
PLANE
– C –
L
e
B
LEAD COPLANARITY
ccc C
9
RC2207
PRODUCT SPECIFICATION
Mechanical Dimensions (continued)
14-Lead Plastic DIP
Notes:
Inches
Millimeters
Min. Max.
Symbol
Notes
1. Dimensioning and tolerancing per ANSI Y14.5M-1982.
Min.
Max.
2. "D" and "E1" do not include mold flashing. Mold flash or protrusions
shall not exceed .010 inch (0.25mm).
A
—
.210
—
—
.38
5.33
—
A1
A2
B
.015
.115
.014
.045
.008
.725
.005
.300
.240
3. Terminal numbers are shown for reference only.
4. "C" dimension does not include solder finish thickness.
5. Symbol "N" is the maximum number of terminals.
2.93
.36
.195
.022
.070
.015
.795
—
4.95
.56
B1
C
1.14
.20
1.78
.38
4
2
D
18.42
.13
20.19
—
D1
E
.325
.280
7.62
6.10
8.26
7.11
E1
e
2
5
.100 BSC
2.54 BSC
eB
L
—
.430
.200
—
10.92
5.08
.115
2.92
N
14
14
D
1
7
E1
D1
8
14
E
e
A
A1
C
L
eB
B1
B
10
PRODUCT SPECIFICATION
RC2207
Mechanical Dimensions (continued)
14-Lead Ceramic DIP
Notes:
Inches
Millimeters
Min. Max.
Symbol
Notes
1. Index area: a notch or a pin one identification mark shall be located
adjacent to pin one. The manufacturer's identification shall not be
used as pin one identification mark.
Min.
Max.
A
—
.200
.023
.065
.015
.785
.310
—
.36
1.14
.20
—
5.08
.58
2. The minimum limit for dimension "b2" may be .023 (.58mm) for leads
number 1, 7, 8 and 14 only.
b1
b2
c1
D
.014
.045
.008
—
8
2
1.65
.38
3. Dimension "Q" shall be measured from the seating plane to the base
plane.
8
4
19.94
7.87
4. This dimension allows for off-center lid, meniscus and glass overrun.
E
.220
5.59
4
5. The basic pin spacing is .100 (2.54mm) between centerlines. Each
pin centerline shall be located within ±.010 (.25mm) of its exact
longitudinal position relative to pins 1 and 14.
5, 9
7
e
.100 BSC
.300 BSC
2.54 BSC
7.62 BSC
eA
L
.125
.200
.060
—
3.18
5.08
1.52
—
6. Applies to all four corners (leads number 1, 7, 8, and 14).
Q
s1
α
.015
.005
90°
.38
.13
90°
3
6
7. "eA" shall be measured at the center of the lead bends or at the
centerline of the leads when "α" is 90°.
105°
105°
8. All leads – Increase maximum limit by .003 (.08mm) measured at the
center of the flat, when lead finish applied.
9. Twelve spaces.
D
1
7
8
NOTE 1
E
14
s1
eA
e
A
Q
c1
α
L
b1
b2
11
PRODUCT SPECIFICATION
RC2207
Ordering Information
Part Number
RC2207M
Package
Operating Temperature Range
14 Lead SOIC
0°C to +70°C
0°C to +70°C
RC2207N
14 Lead Plastic DIP
14 Lead SOIC
RV2207M
-25°C to +85°C
-25°C to +85°C
-55°C to +125°C
-55°C to +125°C
RV2207N
14 Lead Plastic DIP
14 Lead Ceramic DIP
14 Lead Ceramic DIP
RM2207D
RM2207D/883B
Note:
1. /883B suffix denotes MIL-STD-883, Level B processing
The information contained in this data sheet has been carefully compiled; however, it shall not by implication or otherwise become part of the
terms and conditions of any subsequent sale. Raytheon’s liability shall be determined solely by its standard terms and conditions of sale.
No representation as to application or use or that the circuits are either licensed or free from patent infringement is intended or implied.
Raytheon reserves the right to change the circuitry and any other data at any time without notice and assumes no liability for errors.
LIFE SUPPORT POLICY:
Raytheon’s products are not designed for use in life support applications, wherein a failure or malfunction of the component can reasonably
be expected to result in personal injury. The user of Raytheon components in life support applications assumes all risk of such use and
indemnifies Raytheon Company against all damages.
Raytheon Electronics
Semiconductor Division
350 Ellis Street
Mountain View, CA 94043
650.968.9211
FAX 650.966.7742
6/97 0.0m
Stock# DS30002207
© Raytheon Company 1997
相关型号：
©2020 ICPDF网 联系我们和版权申明