MAX038_FUNCTION_GENERATOR_

Published:2009/7/13 21:53:00 Author:May | From:SeekIC

The MAX038 is a precision, high-frequency function generator that produces accurate sine, square, triangle, sawtooth, and pulse waveforms with a minimum of external components. The internal 2.5-V reference (plus an external capacitor and potentiometer) lets you vary the signal frequency from 0.1 Hz to 20 MHz. An applied ± 2.3-V control signal varies the duty cycle between 10 and 90 percent, enabling the generation of sawtooth waveforms and pulse-width modulation. A second frequency-control input-used primarily as a VCO input in phase-locked-loop applications-provides ± 70 percent of fine control. This capability also enables the generation of frequency sweeps and frequency modulation. The frequency and duty-cycle controls have minimal interaction with each other. All output amplitudes are 2 VP-P, symmetrical about ground. The low-impedance output terminal delivers as much as ± 20 mA, and a two-bit code applied to the TTL-compatible A0 and Al inputs selects the sine, square, or triangle output waveform: A0 A1 WAVEFORM X 1 sine wave 0 0 Square wave 1 0 Triangle waveX=Don’t Care



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