MAX038CPP Maxim Integrated Products, MAX038CPP Datasheet

IC GEN WAVEFORM HI-FREQ 20-DIP

MAX038CPP

Manufacturer Part Number
MAX038CPP
Description
IC GEN WAVEFORM HI-FREQ 20-DIP
Manufacturer
Maxim Integrated Products
Type
Waveform Generatorr
Datasheet

Specifications of MAX038CPP

Frequency
20MHz
Voltage - Supply
4.75 V ~ 5.25 V
Current - Supply
45mA
Operating Temperature
0°C ~ 70°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Count
-

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Quantity
Price
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MAX038CPP
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HAR
Quantity:
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AVX
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10 000
Part Number:
MAX038CPP+
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Quantity:
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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 frequen-
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 2V
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.
19-0266; Rev 7; 8/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Precision Function Generators
Voltage-Controlled Oscillators
Frequency Modulators
Pulse-Width Modulators
Phase-Locked Loops
Frequency Synthesizer
FSK Generator—Sine and Square Waves
________________________________________________________________ Maxim Integrated Products
P-P
signal that is symmetrical around
General Description
High-Frequency Waveform Generator
Applications
♦ 0.1Hz to 20MHz Operating Frequency Range
♦ Triangle, Sawtooth, Sine, Square, and Pulse
♦ Independent Frequency and Duty-Cycle
♦ 350 to 1 Frequency Sweep Range
♦ 15% to 85% Variable Duty Cycle
♦ Low-Impedance Output Buffer: 0.1Ω
♦ Low 200ppm/°C Temperature Drift
* Contact factory prior to design.
MAX038CPP
MAX038CWP
MAX038C/D*
Waveforms
Adjustments
TOP VIEW
PART
COSC
DADJ
FADJ
GND
GND
GND
REF
A0
A1
IIN
10
1
2
3
4
5
6
7
8
9
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
MAX038
DIP/SO
Pin Configuration
20
19
18
17
16
15
14
13
12
11
V-
OUT
GND
V+
DV+
DGND
SYNC
PDI
PDO
GND
PIN-PACKAGE
20 Plastic DIP
20 SO
Dice
Features
1

Related parts for MAX038CPP

MAX038CPP Summary of contents

Page 1

... 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 200ppm/°C Temperature Drift PART MAX038CPP MAX038CWP MAX038C/D* * Contact factory prior to design. Applications TOP VIEW Features ...

Page 2

High-Frequency Waveform Generator ABSOLUTE MAXIMUM RATINGS V+ to GND ...............................................................-0.3V to +6V DV+ to DGND...........................................................-0. GND .................................................................+0.3V to -6V Pin Voltages IIN, FADJ, DADJ, PDO .....................(V- - 0.3V) to (V+ + 0.3V) COSC ......................................................................+0. ...

Page 3

High-Frequency Waveform Generator ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1, GND = DV -5V, V GND R = 25kΩ 1kΩ 20pF ...

Page 4

High-Frequency Waveform Generator (Circuit of Figure DV -5V, V otherwise noted.) OUTPUT FREQUENCY vs. IIN CURRENT 100M 10M 1M 100k 10k 1k 100 IIN CURRENT ( μA) NORMALIZED ...

Page 5

High-Frequency Waveform Generator (Circuit of Figure DV -5V, V otherwise noted.) SINE WAVE THD vs. FREQUENCY 100 1k 10k FREQUENCY (Hz) SINE-WAVE OUTPUT (20MHz) I ...

Page 6

High-Frequency Waveform Generator (Circuit of Figure DV -5V, V otherwise noted.) SQUARE-WAVE OUTPUT (20MHz 400μ 20pF F FREQUENCY MODULATION USING I TOP: OUTPUT BOTTOM _______________________________________________________________________________________ ...

Page 7

High-Frequency Waveform Generator (Circuit of Figure DV -5V, V otherwise noted.) OUTPUT SPECTRUM, SINE WAVE (F = 11.5MHz 15kΩ 2.5V - ...

Page 8

High-Frequency Waveform Generator 5 COSC OSCILLATOR GND FADJ 8 OSCILLATOR CURRENT 7 DADJ GENERATOR 10 IIN REF 1 VOLTAGE REFERENCE * 11, 18 ...

Page 9

High-Frequency Waveform Generator A stable 2.5V reference voltage, REF, allows simple determination of IIN, FADJ, or DADJ with fixed resistors, and permits adjustable operation when potentiometers are connected from each of these inputs to REF. FADJ and/or DADJ can be ...

Page 10

High-Frequency Waveform Generator When the MAX038’s frequency is controlled by a volt- age source ( series with a fixed resistor (R IN output frequency is a direct function of V the above equations. Varying V modulates the oscilla- ...

Page 11

High-Frequency Waveform Generator –5V + FREQUENCY 1 V- REF C1 C3 1μF 1nF MAX038 DADJ 20kΩ 10 IIN 8 FADJ R1 12kΩ 5 COSC GND GND GND Figure 2. ...

Page 12

High-Frequency Waveform Generator Programming DADJ DADJ is similar to FADJ; it has a 250µA constant cur- rent sink to V- that must be furnished by the voltage source. The source is usually an op-amp output, and the temperature coefficient of ...

Page 13

High-Frequency Waveform Generator +5V - CENTER SYNC DV FREQUENCY 1 A0 REF DADJ 10 IIN MAX038 8 OUT FADJ R PD PDI 5 COSC PDO GND ...

Page 14

High-Frequency Waveform Generator +N PHASE DETECTOR EXTERNAL OSC INPUT Figure 4. Phase-Locked Loop Using External Phase Detector EXTERNAL OSC INPUT Figure 5. Phase-Locked Loop Using External Frequency Phase Detector 14 ______________________________________________________________________________________ 14 CENTER SYNC FREQUENCY 1 REF ...

Page 15

High-Frequency Waveform Generator 1kHz 2kHz 4kHz 8kHz 16kHz 32kHz 64kHz 128kHz 256kHz 512kHz 1.024MHz 2.048MHz 4.096MHz 8.192MHz Figure 6. Crystal-Controlled, Digitally Programmed Frequency Synthesizer—8kHz to 16MHz with 1kHz Resolution ______________________________________________________________________________________ OUT1 RFB OUT2 VREF GND VDD MX7541 BIT1 BIT12 BIT2 ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products tor compares the ÷ ...

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