XR2206/11/12EB

XR-2206 ...the analog plus Monolithic Function Generator company TM June 1997-3 FEATURES APPLICATIONS
Waveform Generation
Low-Sine Wave Distortion, 0.5%, Typical
Excellent Temperature Stability, 20ppm/°C, Typ.
Sweep Generation
Wide Sweep Range, 2000:1, Typical
AM/FM Generation
Low-Supply Sensitivity, 0.01%V, Typ.
V/F Conversion
Linear Amplitude Modulation
FSK Generation
TTL Compatible FSK Controls
Phase-Locked Loops (VCO)
Wide Supply Range, 10V to 26V
Adjustable Duty Cycle, 1% TO 99% GENERAL DESCRIPTION The XR-2206 is a monolithic function generator integrated circuit capable of producing high quality sine, square, triangle, ramp, and pulse waveforms of high-stability and accuracy. The output waveforms can be both amplitude and frequency modulated by an external voltage. Frequency of operation can be selected externally over a range of 0.01Hz to more than 1MHz. The circuit is ideally suited for communications, instrumentation, and function generator applications requiring sinusoidal tone, AM, FM, or FSK generation. It has a typical drift specification of 20ppm/°C. The oscillator frequency can be linearly swept over a 2000:1 frequency range with an external control voltage, while maintaining low distortion. ORDERING INFORMATION Part No. Package Operating Temperature Range XR-2206M 16 Lead 300 Mil CDIP -55°C to +125°C XR-2206P 16 Lead 300 Mil PDIP –40°C to +85°C XR-2206CP 16 Lead 300 Mil PDIP 0°C to +70°C XR-2206D 16 Lead 300 Mil JEDEC SOIC 0°C to +70°C Rev. 1.03 1972 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538  (510) 668-7000  (510) 668-7017 1 XR-2206 TC1 5 TC2 6 TR1 7 TR2 8 FSKI 9 AMSI 1 Timing Capacitor Timing Resistors VCC GND BIAS 4 12 10 11 SYNCO VCO Current Switches Multiplier And Sine Shaper WAVEA1 13 WAVEA2 14 SYMA1 15 SYMA2 16 Figure 1. XR-2206 Block Diagram Rev. 1.03 2 +1 2 STO 3 MO XR-2206 AMSI STO MO VCC TC1 TC2 TR1 TR2 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 SYMA2 SYMA1 WAVEA2 WAVEA1 GND SYNCO BIAS FSKI AMSI STO MO VCC TC1 TC2 TR1 TR2 16 Lead PDIP, CDIP (0.300”) 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 SYMA2 SYMA1 WAVEA2 WAVEA1 GND SYNCO BIAS FSKI 16 Lead SOIC (Jedec, 0.300”) PIN DESCRIPTION Pin # Symbol Type Description 1 AMSI I Amplitude Modulating Signal Input. 2 STO O Sine or Triangle Wave Output. 3 MO O Multiplier Output. 4 VCC 5 TC1 I Timing Capacitor Input. 6 TC2 I Timing Capacitor Input. 7 TR1 O Timing Resistor 1 Output. 8 TR2 O Timing Resistor 2 Output. 9 FSKI I Frequency Shift Keying Input. 10 BIAS O Internal Voltage Reference. O Sync Output. This output is a open collector and needs a pull up resistor to VCC. Positive Power Supply. 11 SYNCO 12 GND 13 WAVEA1 I Wave Form Adjust Input 1. 14 WAVEA2 I Wave Form Adjust Input 2. 15 SYMA1 I Wave Symetry Adjust 1. 16 SYMA2 I Wave Symetry Adjust 2. Ground pin. Rev. 1.03 3 XR-2206 DC ELECTRICAL CHARACTERISTICS Test Conditions: Test Circuit of Figure 2 Vcc = 12V, TA = 25°C, C = 0.01F, R1 = 100k
, R2 = 10k
, R3 = 25k
Unless Otherwise Specified. S1 open for triangle, closed for sine wave. XR-2206M/P Parameters Min. Typ. XR-2206CP/D Max. Min. Typ. Max. Units Conditions General Characteristics Single Supply Voltage 10 26 10 26 V Split-Supply Voltage +5 +13 +5 +13 V 20 mA Supply Current 12 17 14 R1  10k
Oscillator Section Max. Operating Frequency 0.5 Lowest Practical Frequency 1 0.5 0.01 1 MHz 0.01 Hz C = 1000pF, R1 = 1k
C = 50F, R1 = 2M
Frequency Accuracy +1 +4 +2 % of fo Temperature Stability Frequency +10 +50 +20 ppm/°C 0°C
TA
70°C R1 = R2 = 20k
Sine Wave Amplitude Stability2 4800 4800 ppm/°C Supply Sensitivity 0.01 0.01 %/V 2000:1 fH = fL 2 % fL = 1kHz, fH = 10kHz Sweep Range 0.1 1000:1 2000:1 fo = 1/R1C VLOW = 10V, VHIGH = 20V, R1 = R2 = 20k
fH @ R1 = 1k
fL @ R1 = 2M
Sweep Linearity 10:1 Sweep 2 1000:1 Sweep 8 8 % fL = 100Hz, fH = 100kHz FM Distortion 0.1 0.1 % +10% Deviation Figure 5 Recommended Timing Components Timing Capacitor: C Timing Resistors: R1 & R2 Triangle Sine Wave 0.001 100 0.001 100 F 1 2000 1 2000 k
Output1 Figure 3 Triangle Amplitude Sine Wave Amplitude 160 40 60 80 160 mV/k
Figure 2, S1 Open 60 mV/k
Figure 2, S1 Closed Max. Output Swing 6 6 Vp-p Output Impedance 600 600
Triangle Linearity 1 1 % Amplitude Stability 0.5 0.5 dB For 1000:1 Sweep % R1 = 30k
% See Figure 7 and Figure 8 Sine Wave Distortion Without Adjustment 2.5 With Adjustment 0.4 2.5 1.0 0.5 1.5 Notes 1 Output amplitude is directly proportional to the resistance, R , on Pin 3. See Figure 3. 3 2 For maximum amplitude stability, R should be a positive temperature coefficient resistor. 3 Bold face parameters are covered by production test and guaranteed over operating temperature range. Rev. 1.03 4 XR-2206 DC ELECTRICAL CHARACTERISTICS (CONT’D) XR-2206M/P Parameters Min. Typ. 50 100 XR-2206CP/D Max. Min. Typ. Max. Units 50 100 k
Conditions Amplitude Modulation Input Impedance Modulation Range 100 100 % Carrier Suppression 55 55 dB Linearity 2 2 % For 95% modulation Amplitude 12 12 Vp-p Measured at Pin 11. Rise Time 250 250 ns CL = 10pF Fall Time 50 50 ns CL = 10pF Saturation Voltage 0.2 0.4 0.2 0.6 V IL = 2mA Leakage Current 0.1 20 0.1 100 A VCC = 26V Square-Wave Output FSK Keying Level (Pin 9) 0.8 1.4 2.4 0.8 1.4 2.4 V See section on circuit controls Reference Bypass Voltage 2.9 3.1 3.3 2.5 3 3.5 V Measured at Pin 10. Notes 1 Output amplitude is directly proportional to the resistance, R , on Pin 3. See Figure 3. 3 2 For maximum amplitude stability, R should be a positive temperature coefficient resistor. 3 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 Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . 750mW Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . 5mW/°C Total Timing Current . . . . . . . . . . . . . . . . . . . . . . . . 6mA Storage Temperature . . . . . . . . . . . . -65°C to +150°C SYSTEM DESCRIPTION The XR-2206 is comprised of four functional blocks; a voltage-controlled oscillator (VCO), an analog multiplier and sine-shaper; a unity gain buffer amplifier; and a set of current switches. terminals to ground. With two timing pins, two discrete output frequencies can be independently produced for FSK generation applications by using the FSK input control pin. This input controls the current switches which select one of the timing resistor currents, and routes it to the VCO. The VCO produces an output frequency proportional to an input current, which is set by a resistor from the timing Rev. 1.03 5 XR-2206 VCC 1mF 4 1 5 16 C 6 FSK Input S1 = Open For Triangle = Closed For Sinewave 15 14 13 9 7 8 R1 R2 25K Mult. And Sine Shaper VCO Symmetry Adjust S1 THD Adjust 500 Current Switches Triangle Or Sine Wave Output Square Wave Output 2 +1 11 10 12 1mF XR-2206 3 10K R3 25K + VCC 1mF VCC 5.1K 5.1K Figure 2. Basic Test Circuit ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ 26 70°C Max. Package Dissipation Triangle 5 4 22 1KW Sinewave 3 2 1 0 20 40 60 80 ICC (mA) Peak Output Voltage (Volts) 6 2KW 18 10KW 14 30KW 10 8 100 12 16 20 24 28 VCC (V) R3 in (KW) Figure 3. Output Amplitude as a Function of the Resistor, R3, at Pin 3 Figure 4. Supply Current vs Supply Voltage, Timing, R Rev. 1.03 6 XR-2206 10M ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎ 1M Normal Output Amplitude Timing Resistor ( W ) MAXIMUM TIMING R NORMAL RANGE 100K TYPICAL VALUE 10K 1K 4V 1.0 0.5 MINIMUM TIMING R 10-2 102 10 104 0 VCC / 2 106 Frequency (Hz) DC Voltage At Pin 1 Figure 5. R versus Oscillation Frequency. Figure 6. Normalized Output Amplitude versus DC Bias at AM Input (Pin 1) ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÁÁÁÁÁÁÁ ÎÎÎÎÎÎÎÎÎÎÎÎ ÁÁÁÁÁÁÁ ÎÎÎÎÎÎÎÎÎÎÎÎ ÁÁÁÁÁÁÁ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ 5 5 3 2 1 10 100 R=3KW VOUT =0.5VRMS Pin 2 RL=10KW 3 2 1 0 1.0 ÁÁÁ ÁÁÁÁ ÁÁÁÁ 4 C = 0.01mF Trimmed For Minimum Distortion At 30 KW Distortion (%) Distortion (%) 4 4V 0 103 10 100 1K 10K 100K 1M Frequency (Hz) Timing R K(W) Figure 7. Trimmed Distortion versus Timing Resistor. Figure 8. Sine Wave Distortion versus Operating Frequency with Timing Capacitors Varied. Rev. 1.03 7 XR-2206 3 C=0.01F Frequency Drift (%) 2 R=1M
R=2K
1 R=10K
R=200K
R=200K
0 -1 R=1M
Sweep Input R=1K
Rc + - IB VC -2 R=1K
-3 -50 -25 0 25 IT IC R=10K
R=2K
50 75 R ÁÁ Pin 7 or 8 + 3V - 12 125 100 Ambient Temperature (C°) Figure 9. Frequency Drift versus Temperature. Figure 10. Circuit Connection for Frequency Sweep. VCC 1F 4 1 5 C 16 Mult. And Sine Shaper VCO 6 14 13 9 2M R1 1K 7 8 Current Switches +1 10 R 12 S1 Closed For Sinewave 15 S1 200 2 Triangle Or Sine Wave Output 11 Square Wave Output XR-2206 3 R3 50K + 10K 1F + VCC 10F VCC 5.1K 5.1K Figure 11. Circuit tor Sine Wave Generation without External Adjustment. (See Figure 3 for Choice of R3) Rev. 1.03 8 XR-2206 VCC 1
F 4 1 5 C 1 F= RC 25K Mult. And Sine Shaper VCO 6 R1 1K 7 8 RB 15 14 S1 Closed For Sinewave S1 13 9 2M Symmetry Adjust 16 RA 500 Current Switches 2 +1 Triangle Or Sine Wave Output Square Wave Output 11 10 R 12 3 XR-2206 R3 50K + 1
F 10K + VCC 10
F VCC 5.1K 5.1K Figure 12. Circuit for Sine Wave Generation with Minimum Harmonic Distortion. (R3 Determines Output Swing - See Figure 3) VCC 1
F 4 1 5 >2V F1