參數(shù)資料
型號： MAX038CWP
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 運(yùn)動(dòng)控制電子
英文描述： High-Frequency Waveform Generator
中文描述： SQUARE; TRIANGULAR; SINE; SAWTOOTH; PULSE, 20 MHz, WAVEFORM GENERATION, PDSO20
封裝： SOP-20
文件頁數(shù)： 8/16頁
文件大?。?/td> 203K
代理商： MAX038CWP
M
_______________Detailed Desc ription
The MAX038 is a high-frequency function generator
that produces low-distortion sine, triangle, sawtooth, or
square (pulse) waveforms at frequencies from less than
1Hz to 20MHz or more, using a minimum of external
components. Frequency and duty cycle can be inde-
pendently controlled by programming the current, volt-
age, or resistance. The desired output waveform is
selected under logic control by setting the appropriate
code at the A0 and A1 inputs. A SYNC output and
phase detector are included to simplify designs requir-
ing tracking to an external signal source.
The MAX038 operates with ±5V ±5% power supplies.
The basic oscillator is a relaxation type that operates by
alternately charging and discharging a capacitor, C
F
,
with constant currents, simultaneously producing a tri-
angle wave and a square wave (Figure 1). The charg-
ing and discharging currents are controlled by the cur-
rent flowing into IIN, and are modulated by the voltages
applied to FADJ and DADJ . The current into IIN can be
varied from 2μA to 750μA, producing more than two
decades of frequency for any value of C
F
. Applying
±2.4V to FADJ changes the nominal frequency (with
V
FADJ
= 0V) by ±70%; this procedure can be used for
fine control.
Duty cycle (the percentage of time that the output wave-
form is positive) can be controlled from 10% to 90% by
applying ±2.3V to DADJ . This voltage changes the C
F
charging and discharging current ratio while maintaining
nearly constant frequency.
High-Frequenc y Waveform Generator
8
_______________________________________________________________________________________
MAX038
OSCILLATOR
OSCILLATOR
CURRENT
GENERATOR
2.5V
VOLTAGE
REFERENCE
OSC B
OSC A
TRIANGLE
SINE
SHAPER
COMPARATOR
COMPARATOR
PHASE
DETECTOR
MUX
COSC
GND
5
6
C
F
8
7
10
FADJ
DADJ
IIN
REF
1
17
20
2, 9, 11, 18
V+
V-
GND
R
F
R
D
R
IN
+5V
-5V
-250
μ
A
SINE
TRIANGLE
SQUARE
A0
A1
OUT
SYNC
PDO
PDI
19
14
12
13
R
L
C
L
3
4
DGND
DV+
16
15
+5V
*
=
SIGNAL DIRECTION, NOT POLARITY
= BYPASS CAPACITORS ARE 1
μ
F CERAMIC OR 1
μ
F ELECTROLYTIC IN PARALLEL WITH 1nF CERAMIC.
*
*
Figure 1. Block Diagram and Basic Operating Circuit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX038CWP+ 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
MAX038CWP+T 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
MAX038CWP-T 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
MAX038EPP 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:High-Frequency Waveform Generator
MAX038EVKIT 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Evaluation Kit for the MAX038
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