MAX038CCP

更新时间： 2024-02-11 20:20:25

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
8页	106K
描述
Evaluation Kit

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技术参数
数据手册

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MAX038CCP 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

MAX038CCP 数据手册

MAX0 3 8 Eva lu a t io n Kit

JU3 to allow the frequency to be adjusted. Verify

that there is a shunt on JU5.

In p u t Cu rre n t Co n t ro l

The current injected into the IIN pin acts as the primary

frequency-adjustment control. The R3 potentiometer

varies the current to the MAX038’s IIN pin. The input

current can be easily monitored by removing the JU5

shunt and placing a current meter across the JU5 pins.

The components supplied on the EV kit will allow an

input current range of 50µA to 725µA. With the VADJ

4) Verify the shunts on JU1 and JU2 for a square-wave

outp ut. Re fe r to Ta b le 1 for a lte rna te wa ve form

selections.

5) Apply power and verify the output waveform.

_______________De t a ile d De s c rip t io n

Wa ve fo rm S e le c t io n

pin grounded, the fundamental output frequency (F ) is

as follows:

To select the desired output waveform, place shunts

a c ros s J U1 a nd J U2 in the c omb ina tions s hown in

Table 1. These jumpers set address pins A0 and A1 to

TTL/CMOS-logic levels. External control may be initiat-

ed by connecting an external source to the A0 and

A1 pads and removing the shunts on JU1 and JU2.

Note that there are 10kΩ pull-up resistors to +5V on the

A0 and A1 address lines.

F (MHz) = I (µA) ÷ C (pF)

OSC

[1]

where: I = current injected into IIN

= V

÷ (R3 + R12)

REF

= 2.5V ÷ (0kΩ to 50kΩ + 3.3kΩ)

= external oscillator capacitor (C1)

OSC

Evluates:MAX038

To use an external input current, connect the external

current source to the IIN pad and remove the JU5 shunt

completely. Note that there is a 3.3kΩ resistor in series

with the device IIN pin.

Table 1. Waveform Jumper Select

JU1

Don't Care

Open

JU2

Open

Short

OUTPUT WAVEFORM

Sine Wave

Triangle Wave

Square Wave

FADJ Co n t ro l

Short

Varying the FADJ voltage will also vary the output fre-

quency. With a shunt across pins 1 and 2 of JU3, the

R2 potentiometer will vary the voltage applied to the

FADJ pin. With the JU3 shunt on pins 2 and 3, the FADJ

pin is grounded. Grounding the FADJ pin sets the out-

Table 2. Frequency and Duty-Cycle Jumper Select

SHUNT

LOCATION

JUMPER

MAX038 OUTPUT

p ut to the fund a me nta l outp ut fre q ue nc y (F ), a s

1 & 2

2 & 3

1 & 2

2 & 3

Adjustable Frequency

Pre-Set Frequency*

Adjustable Duty Cycle

Fixed 50% Duty Cycle

given by equation [1].

JU3

JU4

To use an external FADJ voltage, connect the external

source to the FADJ pad and remove the JU3 shunt

completely. Limit the external FADJ voltage to ±2.4V.

* Note: Frequency pre-set by oscillator capacitor (C1) and input

current (position of R3) as specified by formula [1].

Du t y-Cyc le Co n t ro l

The voltage on the DADJ pin controls the duty cycle of

the output waveform. With the JU4 shunt on pins 1 and 2,

the R1 potentiometer will vary the voltage applied to the

DADJ pin, thus varying the duty cycle 15% to 85%. With

the JU4 shunt on pins 2 and 3, the DADJ pin is grounded.

Grounding the DADJ pin fixes the duty cycle at 50%.

Ou t p u t Fre q u e n c y

The output frequency is controlled by the oscillator

capacitor (C1), the current injected into the IIN pin, and

the voltage on the FADJ pin. The EV kit allows indepen-

dent adjustment of both input current (R3) and FADJ

voltage (R2). Refer to the Detailed Description section

of the MAX038 data sheet for additional theory of oper-

ation.

To use an external DADJ voltage, connect the external

voltage source to the DADJ pad and remove the JU4

shunt completely. Limit the external DADJ voltage to

±2.3V.

_______________________________________________________________________________________

123 4 5 6 7 8

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