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MAX2620EUA-T PDF预览

MAX2620EUA-T

更新时间： 2024-01-03 02:52:40
品牌 Logo 应用领域
美信 - MAXIM 电信光电二极管电信集成电路
页数 文件大小 规格书
11页 229K
描述
RF and Baseband Circuit, Bipolar, PDSO8, MICRO, MAX-8

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MAX2620EUA-T 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：SOIC
包装说明：TSSOP,针数：8
Reach Compliance Code：unknown风险等级：5.9
JESD-30 代码：S-PDSO-G8JESD-609代码：e0
长度：3 mm湿度敏感等级：1
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：240认证状态：COMMERCIAL
座面最大高度：1.1 mm标称供电电压：3 V
表面贴装：YES技术：BIPOLAR
电信集成电路类型：RF AND BASEBAND CIRCUIT温度等级：INDUSTRIAL
端子面层：TIN LEAD端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：3 mm

MAX2620EUA-T 数据手册

 浏览型号MAX2620EUA-T的Datasheet PDF文件第4页浏览型号MAX2620EUA-T的Datasheet PDF文件第5页浏览型号MAX2620EUA-T的Datasheet PDF文件第6页浏览型号MAX2620EUA-T的Datasheet PDF文件第8页浏览型号MAX2620EUA-T的Datasheet PDF文件第9页浏览型号MAX2620EUA-T的Datasheet PDF文件第10页 
10MHz to 1050MHz Integrated  
RF Oscillator with Buffered Outputs  
V
CC  
10Ω  
1000pF  
C13*  
V
CC  
L3*  
220nH  
1000pF  
OUT  
OUT  
1000pF  
V
1
CC  
1
2
3
OUT  
8
7
6
5
Z = 50Ω  
O
MAX2620  
TEST PORT  
VCC  
TANK  
FDBK  
V 2  
CC  
C3*  
1000pF  
C2*  
1000pF  
2.7pF  
GND  
OUT  
C10*  
1000pF  
C4*  
1pF  
V
4
BIAS  
SUPPLY  
SHDN  
CC  
Z = 50Ω  
O
ON  
51Ω  
OFF  
V
CC  
*AT 10MHz, CHANGE TO:  
C3 = C4 = 270pF  
10Ω  
1000pF  
L3 = 10µH  
1000pF  
C2 = C10 = C13 = 0.01µF  
Figure 1. 900MHz Test Circuit  
_______________Detailed Description  
__________Applications Information  
Oscillator  
The oscillator is a common-collector, negative-  
resistance type that uses the IC’s internal parasitic ele-  
ments to create a negative resistance at the base-  
emitter port. The transistor oscillator has been opti-  
mized for low-noise operation. Base and emitter leads  
are provided as external connections for a feedback  
capacitor and resonator. A resonant circuit, tuned to  
the appropriate frequency and connected to the base  
lead, will cause oscillation. Varactor diodes may be  
used in the resonant circuit to create a voltage-con-  
trolled oscillator (VCO). The oscillator is internally  
biased to an optimal operating point, and the base and  
emitter leads need to be capacitively coupled due to  
the bias voltages present.  
Design Principles  
At the frequency of interest, the MAX2620 portion of  
Figure 2 shows the one-port circuit model for the TANK  
pin (test port in Figure 1).  
For the circuit to oscillate at a desired frequency, the res-  
onant tank circuit connected to TANK must present an  
impedance that is a complement to the network  
(Figure 2). This resonant tank circuit must have a positive  
real component that is a maximum of one-half the magni-  
tude of the negative real part of the oscillator device, as  
well as a reactive component that is opposite in sign to  
the reactive component of the oscillator device.  
Output Buffers  
The output buffers (OUT and OUT) are an open-  
collector, differential-pair configuration and provide  
load isolation to the oscillator. The outputs can be used  
differentially to drive an integrated circuit mixer.  
Alternatively, isolation is provided between the buffer  
outputs when one output drives a mixer (either upcon-  
version or downconversion) and the other output drives  
a prescaler. The isolation in this configuration prevents  
prescaler noise from corrupting the oscillator signal’s  
spectral purity.  
TANK  
jX  
-jX  
T
L
-R  
n
LESS THAN 1/2  
TIMES R  
L
RESONANT  
TANK  
OSCILLATOR  
DEVICE  
A logic-controlled SHDN pin turns off all bias to the IC  
when pulled low.  
Figure 2. Simplified Oscillator Circuit Model  
_______________________________________________________________________________________  
7
1...4567891011

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