Monolithic function generator

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XR-2206
...the analog plus company TM

Monolithic Function Generator
June 1997-3

FEATURES D Low-Sine Wave Distortion, 0.5%, Typical D Excellent Temperature Stability, 20ppm/°C, Typ. D Wide Sweep Range, 2000:1, Typical D Low-Supply Sensitivity, 0.01%V, Typ. D Linear Amplitude Modulation D TTL Compatible FSK Controls D Wide Supply Range, 10V to 26V D Adjustable Duty Cycle, 1% TO 99%APPLICATIONS D Waveform Generation D Sweep Generation D AM/FM Generation D V/F Conversion D FSK Generation D Phase-Locked Loops (VCO)

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 modulatedby 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 rangewith an external control voltage, while maintaining low distortion.

ORDERING INFORMATION
Operating Temperature Range -55°C to +125°C –40°C to +85°C 0°C to +70°C 0°C to +70°C

Part No. XR-2206M XR-2206P XR-2206CP XR-2206D

Package 16 Lead 300 Mil CDIP 16 Lead 300 Mil PDIP 16 Lead 300 Mil PDIP 16 Lead 300 Mil JEDEC SOIC

Rev. 1.03
E1972

EXAR Corporation, 48720 Kato Road, Fremont, CA94538 z (510) 668-7000 z (510) 668-7017 1

XR-2206

VCC 4 TC1 Timing Capacitor TC2 6 5 VCO

GND 12

BIAS 10 11 SYNCO

Timing Resistors

TR1

7 Current Switches Multiplier And Sine Shaper

TR2 FSKI AMSI

8 9 1

+1

2

STO

3

MO

WAVEA1 13 WAVEA2 14 SYMA1 15 SYMA2 16

Figure 1. XR-2206 Block Diagram

Rev. 1.03 2

XR-2206

AMSI STO MO VCC TC1 TC2 TR1 TR2

1 23 4 5 6 7 8

16 15 14 13 12 11 10 9

SYMA2 SYMA1 WAVEA2 WAVEA1 GND SYNCO BIAS FSKI

AMSI STO MO VCC TC1 TC2 TR1 TR2

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10 9

SYMA2 SYMA1 WAVEA2 WAVEA1 GND SYNCO BIAS FSKI

16 Lead PDIP, CDIP (0.300”)

16 Lead SOIC (Jedec, 0.300”)

PIN DESCRIPTION
Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol AMSI STO MO VCC TC1 TC2 TR1 TR2 FSKI BIAS SYNCOGND WAVEA1 WAVEA2 SYMA1 SYMA2 I I I I I I O O I O O Type I O O Description Amplitude Modulating Signal Input. Sine or Triangle Wave Output. Multiplier Output. Positive Power Supply. Timing Capacitor Input. Timing Capacitor Input. Timing Resistor 1 Output. Timing Resistor 2 Output. Frequency Shift Keying Input. Internal Voltage Reference. Sync Output. This output is a open collector and needs apull up resistor to VCC. Ground pin. Wave Form Adjust Input 1. Wave Form Adjust Input 2. Wave Symetry Adjust 1. Wave Symetry Adjust 2.

Rev. 1.03 3

XR-2206
DC ELECTRICAL CHARACTERISTICS
Test Conditions: Test Circuit of Figure 2 Vcc = 12V, TA = 25°C, C = 0.01mF, R1 = 100kW, R2 = 10kW, R3 = 25kW Unless Otherwise Specified. S1 open for triangle, closed for sine wave.
XR-2206M/P ParametersGeneral Characteristics Single Supply Voltage Split-Supply Voltage Supply Current Oscillator Section Max. Operating Frequency Lowest Practical Frequency Frequency Accuracy Temperature Stability Frequency Sine Wave Amplitude Stability2 Supply Sensitivity Sweep Range Sweep Linearity 10:1 Sweep 1000:1 Sweep FM Distortion Recommended Timing Components Timing Capacitor: C Timing Resistors: R1 & R2 TriangleSine Wave Triangle Amplitude Sine Wave Amplitude Max. Output Swing Output Impedance Triangle Linearity Amplitude Stability Sine Wave Distortion Without Adjustment With Adjustment 2.5 0.4 1.0 2.5 0.5 1.5 % % R1 = 30kW See Figure 7 and Figure 8 40 Output1 160 60 6 600 1 0.5 80 160 60 6 600 1 0.5 mV/kW mV/kW Vp-p W % dB For 1000:1 Sweep 0.001 1 100 2000 0.001 1 100 2000 mF kW 2 8 0.1 2 8 0.1 % % %...
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