The MAX038 is a high-frequency, precision functiongenerator producing accurate, high-frequency triangle,sawtooth, sine, square, and pulse waveforms with aminimum of external components. The output frequencycan be controlled over a frequency range of 0.1Hz to20MHz by an internal 2.5V bandgap voltagereference and an external resistor and capacitor. Theduty cycle can be varied over a wide range by applyinga ±2.3V control signal, facilitating pulse-width modulationand the generation of sawtooth waveforms.Frequency modulation and frequency sweeping areachieved in the same way. The duty cycle andfrequency controls are independent.Sine, square, or triangle waveforms can be selected atthe output by setting the appropriate code at twoTTL-compatible select pins. The output signal for allwaveforms is a 2VP-P signal that is symmetrical aroundground. The low-impedance output can drive upto ±20mA.The TTL-compatible SYNC output from the internaloscillator maintains a 50% duty cycle—regardless ofthe duty cycle of the other waveforms—to synchronizeother devices in the system. The internal oscillator canbe synchronized to an external TTL clock connectedto PDI.________________________ApplicationsPrecision Function GeneratorsVoltage-Controlled OscillatorsFrequency ModulatorsPulse-Width ModulatorsPhase-Locked LoopsFrequency SynthesizerFSK Generator—Sine and Square Waves
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