MAX038CPP Datasheet, PDF (1/16 Pages) Maxim Integrated Products – High-Frequency Waveform Generator

19-0266; Rev 2a; 9/96
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High-Frequency Waveform Generator
_______________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 modula-
tion 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 2V_P-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.
____________________________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: 0.1Ω
o Low-Distortion Sine Wave: 0.75%
o Low 200ppm/°C Temperature Drift
______________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 for dice specifications.
________________________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
MAX038
20 ^V-
19 ^OUT
18 ^GND
17 V+
16 DV+
15 DGND
14 SYNC
13 PDI
12 PDO
11 GND
DIP/SO
________________________________________________________________ Maxim Integrated Products 1
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For small orders, phone [phone] ext. 3468.