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XR-2206
...the analog plus company TM

Monolithic Function Generator
February 2008-8

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 frequencymodulated 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 frequencyrange with an external control voltage, while maintaining low distortion.

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

Part No.

Package

XR-2206P XR-2206CP XR-2206D

16 Lead 300 Mil PDIP 16 Lead 300 Mil PDIP 16 Lead 300 Mil JEDEC SOIC

Rev. 1.04
E2008

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 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. 1.04 2

XR-2206

AMSI STO MO VCC TC1 TC2 TR1 TR2

1 2 3 4 5 6 7 8

16 15 14 13 12 11 109

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 SYNCO GND WAVEA1 WAVEA2 SYMA1 SYMA2 I I II 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 a pull 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. 1.04 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-2206P Parameters General Characteristics Single SupplyVoltage 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 Triangle Sine Wave Triangle Amplitude Sine WaveAmplitude 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 % % % fL = 1kHz, fH = 10kHz fL = 100Hz, fH =...