MAX038CWP

更新时间： 2024-01-17 04:49:52

品牌	Logo	应用领域
美信 - MAXIM		模拟波形发生功能信号电路光电二极管
页数	文件大小	规格书
16页	204K
描述
High-Frequency Waveform Generator

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技术参数
数据手册

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MAX038CWP 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	SOP,
针数：	20	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.89	其他特性：	ALSO REQUIRES -5V SUPPLY
模拟集成电路 - 其他类型：	SQUARE; TRIANGULAR; SINE; SAWTOOTH; PULSE	JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e0	长度：	12.8 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	20	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出频率：	20 GHz
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	240	认证状态：	Not Qualified
座面最大高度：	2.65 mm	最大供电电压 (Vsup)：	5.25 V
最小供电电压 (Vsup)：	4.75 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	TIN LEAD	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	7.5 mm
Base Number Matches：	1

MAX038CWP 数据手册

Hig h -Fre q u e n c y Wa ve fo rm Ge n e ra t o r

tor compares the ÷N output with the MAX038 SYNC

La yo u t Co n s id e ra t io n s

Realizing the full performance of the MAX038 requires

careful attention to power-supply bypassing and board

layout. Use a low-impedance ground plane, and con-

nect all five GND pins directly to it. Bypass V+ and V-

directly to the ground plane with 1µF ceramic capaci-

tors or 1µF tantalum capacitors in parallel with 1nF

ceramics. Keep capacitor leads short (especially with

the 1nF ceramics) to minimize series inductance.

output and sends differential phase information to U5.

U5’s single-ended output is summed with an offset into

the FADJ input. (Using the DAC and the IIN pin for

coarse frequency control allows the FADJ pin to have

very fine control with reasonably fast response to switch

changes.)

A 50MHz, 50Ω lowpass filter in the output allows pas-

sage of 16MHz square waves and triangle waves with

reasonable fidelity, while stopping high-frequency noise

generated by the ÷N circuit.

MAX038

If SYNC is used, DV+ must be connected to V+, DGND

must be connected to the ground plane, and a second

1nF ceramic should be connected as close as possible

between DV+ and DGND (pins 16 and 15). It is not

necessary to use a separate supply or run separate

traces to DV+. If SYNC is disabled, leave DV+ open.

Do not open DGND.

___________________Ch ip To p o g ra p h y

Minimize the trace area around COSC (and the ground

plane area under COSC) to reduce parasitic capaci-

tance, and surround this trace with ground to prevent

coupling with other signals. Take similar precautions

V-

GND

REF

OUT

GND

V+

with DADJ, FADJ, and IIN. Place C so its connection

to the ground plane is close to pin 6 (GND).

__________Ap p lic a t io n s In fo rm a t io n

DV+

DGND

Fre q u e n c y S yn t h e s ize r

Figure 6 shows a frequency synthesizer that produces

accurate and stable sine, square, or triangle waves with

a frequency range of 8kHz to 16.383MHz in 1kHz incre-

ments. A Motorola MC145151 provides the crystal-con-

trolled oscillator, the ÷N circuit, and a high-speed phase

detector. The manual switches set the output frequency;

opening any switch increases the output frequency.

Ea c h s witc h c ontrols b oth the ÷ N outp ut a nd a n

MX7541 12-bit DAC, whose output is converted to a cur-

rent by using both halves of the MAX412 op amp. This

current goes to the MAX038 IIN pin, setting its coarse

frequency over a very wide range.

COSC

0. 118"

(2. 997mm)

SYNC

GND

DADJ

PDI

FADJ GND IIN

0. 106"

(2. 692mm)

PDO

GND

Fine frequency control (and phase lock) is achieved

from the MC145151 phase detector through the differ-

ential amplifier and lowpass filter, U5. The phase detec-

TRANSISTOR COUNT: 855

SUBSTRATE CONNECTED TO GND

16 ______________________________________________________________________________________

1...13 14 1516

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与MAX038CWP相关器件

型号	品牌	描述	获取价格	数据表
MAX038CWP+	MAXIM	1 Func, 20MHz, PDSO20, SO-20	获取价格
MAX038CWP+T	MAXIM	1 Func, 20MHz, PDSO20, SO-20	获取价格
MAX038CWP-T	MAXIM	暂无描述	获取价格
MAX038EPP	MAXIM	High-Frequency Waveform Generator	获取价格
MAX038EVKIT	MAXIM	Evaluation Kit for the MAX038	获取价格
MAX038EWP	MAXIM	High-Frequency Waveform Generator	获取价格

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