Maxim MAX038 free download

File name MAX038.pdf

19-0266; Rev 5; 2/04 KIT ATION EVALU E AILABL AV High-Frequency Waveform Generator ____________________________Features o 0.1Hz to 20MHz Operating Frequency Range o Triangle, Sawtooth, Sine, Square, and Pulse Waveforms o Independent Frequency and Duty-Cycle Adjustments o 350 to 1 Frequency Sweep Range o 15% to 85% Variable Duty Cycle o Low-Impedance Output Buffer: 0.1 o Low 200ppm/°C Temperature Drift ________________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. 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 to ±20mA. The TTL-compatible SYNC output from the internal oscillator maintains a 50% duty cycle--regardless of the duty cycle of the other waveforms--to synchronize other devices in the system. The internal oscillator can be synchronized to an external TTL clock connected to PDI. MAX038 _______________Ordering Information PART MAX038CPP MAX038CWP MAX038C/D* MAX038EPP* MAX038EWP* TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 20 Plastic DIP 20 SO Dice 20 Plastic DIP 20 SO *Contact factory prior to design. ________________________Applications Precision Function Generators Voltage-Controlled Oscillators Frequency Modulators Pulse-Width Modulators Phase-Locked Loops Frequency Synthesizer FSK Generator--Sine and Square Waves ___________________Pin Configuration TOP VIEW REF 1 GND 2 A0 3 A1 4 COSC 5 GND 6 DADJ 7 FADJ 8 GND 9 IIN 10 20 V19 OUT 18 GND MAX038 17 V+ 16 DV+ 15 DGND 14 SYNC 13 PDI 12 PDO 11 GND DIP/SO ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. High-Frequency Waveform Generator MAX038 ABSOLUTE MAXIMUM RATINGS V+ to GND ...-0.3V to +6V DV+ to DGND...-0.3V to +6V V- to GND ...+0.3V to -6V Pin Voltages IIN, FADJ, DADJ, PDO ...(V- - 0.3V) to (V+ + 0.3V) COSC ...