Datasheet MAX038 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | High-Frequency Waveform Generator |
| Seiten / Seite | 17 / 1 — High-Frequency Waveform Generator. General Description. Features. 0.1Hz … |
| Dateiformat / Größe | PDF / 491 Kb |
| Dokumentensprache | Englisch |
High-Frequency Waveform Generator. General Description. Features. 0.1Hz to 20MHz Operating Frequency Range
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MAX038 AVAILABLE
High-Frequency Waveform Generator General Description Features
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.
PART TEMP RANGE PIN-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 Diagrams Applications Pin 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
High-Frequency Waveform Generator General Description Features
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.
PART TEMP RANGE PIN-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 Diagrams Applications Pin 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