MAX038 AVAILABLE High-Frequency Waveform GeneratorGeneral DescriptionFeatures The MAX038 is a high-frequency, precision function ♦ 0.1Hz to 20MHz Operating Frequency Range generator producing accurate, high-frequency triangle, sawtooth, sine, square, and pulse waveforms with a ♦ Triangle, Sawtooth, Sine, Square, and Pulse minimum of external components. The output frequency Waveforms can be controlled over a frequency range of 0.1Hz to ♦ Independent Frequency and Duty-Cycle 20MHz by an internal 2.5V bandgap voltage Adjustments reference and an external resistor and capacitor. The duty cycle can be varied over a wide range by applying ♦ 350 to 1 Frequency Sweep Range a ±2.3V control signal, facilitating pulse-width modula- ♦ 15% to 85% Variable Duty Cycle tion and the generation of sawtooth waveforms. Frequency modulation and frequency sweeping are ♦ Low-Impedance Output Buffer: 0.1Ω achieved in the same way. The duty cycle and frequen- ♦ Low 200ppm/°C Temperature Drift cy controls are independent. Sine, square, or triangle waveforms can be selected at the output by setting the appropriate code at two TTL-compatible select pins. The output signal for all waveforms is a 2VP-P signal that is symmetrical around ground. The low-impedance output can drive up Ordering Information to ±20mA. PARTTEMP RANGEPIN-PACKAGE The TTL-compatible SYNC output from the internal MAX038CPP 0°C to +70°C 20 Plastic DIP oscillator maintains a 50% duty cycle—regardless of MAX038CWP 0°C to +70°C 20 SO the duty cycle of the other waveforms—to synchronize other devices in the system. The internal oscillator can MAX038C/D* 0°C to +70°C Dice be synchronized to an external TTL clock connected * Contact factory prior to design. to PDI. Functional DiagramsApplicationsPin Configuration Precision Function Generators Voltage-Controlled Oscillators TOP VIEW Frequency Modulators REF 1 20 V- Pulse-Width Modulators GND 2 19 OUT Phase-Locked Loops A0 3 18 GND Frequency Synthesizer A1 4 MAX038 17 V+ FSK Generator—Sine and Square Waves COSC 5 16 DV+ GND 6 15 DGND DADJ 7 14 SYNC FADJ 8 13 PDI GND 9 12 PDO IIN 10 11 GND Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet.DIP/SO UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-0266; Rev 7; 8/07 Ordering Information * Contact factory prior to design. Document Outline Blank Page
