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: 0.1Ω
♦ 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 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.
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.