RC2207 RAYTHEON | Alldatasheet
Document overview
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Technical content
Features
- Excellent temperature stability — 20 ppm/ C
- Linear frequency sweep
- Adjustable duty cycle — 0.1% to 99.9%
- Two or four level FSK capability
- 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
Applications
- FSK generation
- V oltage and current-to-frequency conversion
- Stable phase-locked loop
- Waveform generation triangle, sawtooth, pulse, squarewave
- FM and sweep generation
Description
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. 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). The RC2207 has a typical drift specification of 20 ppm/ 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. RC2207 Voltage Controlled Oscillator Rev. 1.0.0 Block Diagram VCOTIMING CAPACITOR TIMING RESISTORS R1-R4 CURRENT SWITCH TRIANGLE WAVE OUTPUT BINARY KEY INPUTS SQUARE WAVE OUTPUT –VS 65-2207-01
RC2207 PRODUCT SPECIFICATION Pin Assignments Pin Descriptions Pin Name Pin Number Pin Function Description Bias for Single Supply
11 For single supply operations, pin 11 should be externally biased to a
S /3 and +V S /2 (see Figure 8). The bias current at pin 11 is nominally 5% of the total oscillation timing current I T Binary Keying Inputs 8, 9 The internal impedance at these pins is approximately 5 k W . Keying levels are <1.4V for zero and > 3V for one logic levels referenced to the DC voltage at pin 10. Ground 10 For split supply operation, this pin serves as circuit ground. For single supply operation, pin 10 should be AC grounded through a 1 m F bypass capacitor. During split supply operation, a ground current of 2 I T flows out of this terminal, where I T is the total timing current. 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 L serves as a pull-up load resistor for this output. Recommended values for R L range from 1 k W to 10 k W Supply Voltage (+V S , –V S 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. Timing Capacitor 2, 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 100 pF to 100 m F. The capacitor should be non-polarized. Timing Resistors (R1–R4) 4–7 The timing resistors determine the total timing current, I T , available to charge the timing capacitor. Values for timing resistors can range from 1.5 k W to 2 M W ; however, for optimum temperature and power supply stability, recommended values are 4 k W to 200 k W . 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 m F 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 10 W 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. 65-2207-02 Binary Keying Inputs GND Bias Squarewave Output Trianglewave Output+V S Timing Capacitor Timing Resistors +VS
PRODUCT SPECIFICATION RC2207 Absolute Maximum Ratings Thermal Characteristics Parameter Min. Max. Units Supply Voltage +26 V Storage Temperature Range -65 +150 V Operating Temperature Range -55 +125 C Lead Soldering Temperature (60 seconds) +300 C Ceramic DIP SOIC Plastic DIP Maximum Juncton Temperature +175 C +125 C +125 C Maximum P D T A < 50 C 1042 mW 300 mW 468 mW Thermal Resistance, q JC C/W 60 C/W 60 C/W Thermal Resistance, q JA 120 C/W 200 C/W 160 C/W For T A > 50 C Derate at 8.33 mW/ C 5.0 mW/ C 6.25 mW/ C
RC2207 PRODUCT SPECIFICATION
Electrical Characteristics
(Test Circuit of Figure 1, V S 6V, T A = +25 C, C = 5000 pF , R1= R2 = R3 = R4 = 20 k W , R L = 4.7 W binary inputs grounded, S1 and S2 closed unless otherwise specified) Note: 1. Guaranteed by design. Parameters Test Conditions Min. Typ. Max. Units General Characteristics Supply Voltage Single Supply See Typical Performance Characteristics +8.0 +12 +26 V Split Supplies 13 V Supply Current Single Supply Measured at pin 1, S1 open (See Fig. 8) 5.0 7.0 mA Split Supplies Positive Measured at pin 1, S1 open (See Fig. 7) RC2207 5.0 7.0 mA RM2207 8.0 Negative Measured at pin 12, S1, S2 open RC2207 7.0 mA RM2207 4.0 6.0 Binary Keying Inputs Switching Threshold Measured at pins 8 and 9. Refer to pin 10. 1.4 2.2 2.8 V Input Resistance 5.0 k W Oscillator Section—Frequency Characteristics Upper Frequency Limit C = 500 pF, R3 = 2 k W 0.5 1.0 MHz Lower Practical Frequency C = 50 m F, R3 = 2 k W 0.01 Hz Frequency Accuracy 1.0 3.0 % of f Frequency Matching 0.5 % of f Frequency Stability vs. Temperature (Note 1) 0 C < T A < +70 C 20 50 ppm/ C vs. Supply Voltage 0.15 %/V Sweep Range R3 = 1.5 k W for f H R3 = 2 M W for f L 1000:1 3000:1 f H L Sweep Linearity C = 5000 pF 10:1 Sweep f H = 10 kHz, f L = 1 kHz 1.0 2.0 % 1000:1 Sweep f H = 100 kHz, f L = 100 Hz 5.0 % FM Distortion 10% FM Deviation 0.1 % Recommended Range of Timing Resistors See Characteristic Curves 1.5 2000 k W Impedance at Timing Pins Measured at pins 4, 5, 6, or 7 75 W DC Level at Timing Terminals 10 mV Output Characteristics Triangle output Amplitude Measured at pin 14 4 6 V P-P Impedance 10 W DC Level Referenced to pin 10 +100 mV Linearity from 10% to 90% of swing 0.1 % Squarewave Output Amplitude Measured at pin 13, S2 Closed 11 12 V P-P Saturation Voltage Referenced to pin 12 0.2 0.4 V Rise Time C L £ 10 pF 200 ns Fall Time C L £ 10 pF 20 ns
- 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. 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. Otherwise, the frequency is either 1/(R1| |R2)C or 1/(R1| |R4)C.
Table 1. Logic Table for Binary Keying Controls
- For single supply operation, logic levels are referenced to
peak-to-peak voltage swing equal to the supply voltages. to it –13V . Minimum drift occurs with –6V supplies. bypassed to ground through a 0.1mF capacitor. Figure 7. Test Circuit for Split Supply Operation
14 Trianglewave
with automated test equipment using an equivalent circuit.
series resistor RC as shown in Figure 9. T, and the frequency, to increase. Table 1. Timing pin 5 is activated when the output is high, Figure 8. Test Circuit for Single Supply Operation
Figure 9. Frequency Sweep Operation Figure 10. Pulse and Sawtooth Generation
PRODUCT SPECIFICATION RC2207 Mechanical Dimensions 14-Lead SOIC A .053 .069 1.35 1.75 Symbol Inches Min. Max. Min. Max. Millimeters Notes A1 .004 .010 0.10 0.25 .020 0.51B .013 0.33 C .008 .010 0.19 0.25 E .150 .158 3.81 4.01 e .228 .244 5.79 6.20 .010 .020 0.25 0.50 H .050 BSC 1.27 BSC h L .016 .050 0.40 1.27 0° 8° 0° 8° N1 4 1 4 α ccc .004 0.10—— D .336 .345 8.54 8.76 Notes: Dimensioning and tolerancing per ANSI Y14.5M-1982. "D" and "E" do not include mold flash. Mold flash or protrusions shall not exceed .010 inch (0.25mm). "L" is the length of terminal for soldering to a substrate. Terminal numbers are shown for reference only. "C" dimension does not include solder finish thickness. Symbol "N" is the maximum number of terminals. 14 8 D A – C – ccc C LEAD COPLANARITY SEATING PLANEe B L h x 45° C α EH
RC2207 PRODUCT SPECIFICATION Mechanical Dimensions (continued) 14-Lead Plastic DIP D e B A L 8 14 E eB C A — .210 — 5.33 Symbol Inches Min. Max. Min. Max. Millimeters Notes A1 .015 — .38 — .022 .56B .014 .36 .195 4.95A2 .115 2.93 B1 .045 .070 1.14 1.78 D .725 .795 18.42 20.19 .300 .325 7.62 8.26E eB — .430 — 10.92 .115 .200 2.92 5.08 e .100 BSC 2.54 BSC L 14 14 5N .240 .280 6.10 7.11E1 C .008 .015 .20 .38 D1 .005 — .13 — Notes: Dimensioning and tolerancing per ANSI Y14.5M-1982. "D" and "E1" do not include mold flashing. Mold flash or protrusions shall not exceed .010 inch (0.25mm). Terminal numbers are shown for reference only. "C" dimension does not include solder finish thickness. Symbol "N" is the maximum number of terminals.
PRODUCT SPECIFICATION RC2207 Mechanical Dimensions (continued) 14-Lead Ceramic DIP A — .200 — 5.08 Symbol Inches Min. Max. Min. Max. Millimeters Notes b1 .014 .023 .36 .58 .065 1.65b2 .045 1.14 c1 .008 .015 .20 .38 E .220 .310 5.59 7.87 e .100 BSC 2.54 BSC L .125 .200 3.18 5.08 .015 .060 .38 1.52 .005 — .13 — 5, 9 eA .300 BSC 7.62 BSC 7 Q 90° 105° 90° 105°α D — .785 — 19.94 Notes: 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. The minimum limit for dimension "b2" may be .023 (.58mm) for leads number 1, 7, 8 and 14 only. Dimension "Q" shall be measured from the seating plane to the base plane. This dimension allows for off-center lid, meniscus and glass overrun. 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. Applies to all four corners (leads number 1, 7, 8, and 14). "eA" shall be measured at the center of the lead bends or at the centerline of the leads when "α " is 90°. All leads – Increase maximum limit by .003 (.08mm) measured at the center of the flat, when lead finish applied. Twelve spaces. NOTE 1 D E 8 14 7 1 Q A e L eA α
PRODUCT SPECIFICATION RC2207 6/97 0.0m Stock# DS30002207 © Raytheon Company 1997 The information contained in this data sheet has been carefully compiled; how ever, 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 O rdering Information Note: 1. /883B suffix denotes MIL-STD-883, Level B processing Part Number Package Operating Temperature Range RC2207M 14 Lead SOIC 0°C to +70°C RC2207N 14 Lead Plastic DIP 0°C to +70°C RV2207M 14 Lead SOIC -25°C to +85°C RV2207N 14 Lead Plastic DIP -25°C to +85°C RM2207D 14 Lead Ceramic DIP -55°C to +125°C RM2207D/883B 14 Lead Ceramic DIP -55°C to +125°C