FEATURES
General Description
The MAX038 is a high-frequency, precision function generator producing accurate, high-frequency triangle, sawtooth, sine, square, and pulse waveforms with a minimum of external components. The output frequency can be controlled over a frequency range of 0.1Hz to 20MHz by an internal 2.5V bandgap voltage reference and an external resistor and capacitor. The duty cycle can be varied over a wide range by applying a ±2.3V control signal, facilitating pulse-width modulation and the generation of sawtooth waveforms. Frequency modulation and frequency sweeping are achieved in the same way. The duty cycle and frequency controls are independent.
Features
♦ 0.1Hz to 20MHz Operating Frequency Range
♦ Triangle, Sawtooth, Sine, Square, and Pulse Waveforms
♦ Independent Frequency and Duty-Cycle Adjustments
♦ 350 to 1 Frequency Sweep Range
♦ 15% to 85% Variable Duty Cycle
♦ Low-Impedance Output Buffer: 0.1Ω
♦ Low-Distortion Sine Wave: 0.75%
♦ Low 200ppm/°C Temperature Drift
Applications
Precision Function Generators
Voltage-Controlled Oscillators
Frequency Modulators
Pulse-Width Modulators
Phase-Locked Loops
Frequency Synthesizer
FSK Generator—Sine and Square Waves
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