Image MAX038
型号: MAX038
厂商: Maxim Integrated Maxim Integrated
分类: 集成电路
描述: high-frequency waveform generator
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19-0266; Rev 2a; 9/96  
Hig h -Fre q u e n c y Wa ve fo rm Ge n e ra t o r  
MAX038  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
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 b y a n inte rna l 2.5V b a nd g a p volta g e  
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 modula-  
tion a nd the g e ne ra tion of s a wtooth wa ve forms .  
Frequency modulation and frequency sweeping are  
a c hie ve d in the s a me wa y. The d uty c yc le a nd  
frequency controls are independent.  
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: 0.1  
Low-Distortion Sine Wave: 0.75%  
Low 200ppm/°C Temperature Drift  
Sine, square, or triangle waveforms can be selected at  
the outp ut b y s e tting the a p p rop ria te c od e a t two  
TTL-compatible select pins. The output signal for all  
______________Ord e rin g In fo rm a t io n  
waveforms is a 2V  
signal that is symmetrical around  
P-P  
PART  
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  
g round . The low-imp e d a nc e outp ut c a n d rive up  
to ±20mA.  
MAX038CPP  
MAX038CWP  
MAX038C/D  
MAX038EPP  
MAX038EWP  
The TTL-c omp a tib le SYNC outp ut from the inte rna l  
oscillator maintains a 50% duty cycleregardless 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.  
Dice*  
20 Plastic DIP  
20 SO  
*Contact factory for dice specifications.  
________________________Ap p lic a t io n s  
__________________P in Co n fig u ra t io n  
Precision Function Generators  
Voltage-Controlled Oscillators  
Frequency Modulators  
TOP VIEW  
REF  
GND  
A0  
V-  
1
2
Pulse-Width Modulators  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
OUT  
GND  
V+  
Phase-Locked Loops  
3
Frequency Synthesizer  
A1  
4
MAX038  
FSK Generator—Sine and Square Waves  
COSC  
GND  
DADJ  
FADJ  
GND  
DV+  
DGND  
SYNC  
PDI  
5
6
7
8
PDO  
GND  
9
IIN  
10  
DIP/SO  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 408-737-7600 ext. 3468.  

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