欢迎访问ic37.com |
会员登录 免费注册
发布采购

ML13146-9P 参数 Datasheet PDF下载

ML13146-9P图片预览
型号: ML13146-9P
PDF下载: 下载PDF文件 查看货源
内容描述: 低功耗DC - 1.8 GHz的发射器 [Low Power DC - 1.8 GHz Transmitter]
分类和应用:
文件页数/大小: 15 页 / 7236 K
品牌: LANSDALE [ LANSDALE SEMICONDUCTOR INC. ]
 浏览型号ML13146-9P的Datasheet PDF文件第2页浏览型号ML13146-9P的Datasheet PDF文件第3页浏览型号ML13146-9P的Datasheet PDF文件第4页浏览型号ML13146-9P的Datasheet PDF文件第5页浏览型号ML13146-9P的Datasheet PDF文件第7页浏览型号ML13146-9P的Datasheet PDF文件第8页浏览型号ML13146-9P的Datasheet PDF文件第9页浏览型号ML13146-9P的Datasheet PDF文件第10页  
ML13146  
LANSDALE Semiconductor, Inc.  
CIRCUIT DESCRIPTION  
General  
where Cv is the equivalent capacitance of the varactor at the  
control voltage.  
The ML13146 consists of a low power amplifier, a 50 lin-  
ear mixer with linearity control, divide by 64/65 dual modulus  
prescaler and LPA. This device is designated for use as the low  
power transmitter in analog and digital FM systems such as  
UHF and 800 MHz Special Mobile Radio (SMR), UHF Family  
Radio Services, PCS and 902 to 928MHz cordless telephones.  
It features a mixer linearity control to preset or auto program  
the mixer dynamic range, an enable function and a wideband  
mixer output so the IC may be used either as an up converter  
or for a direct conversion source. Additional details are covered  
in the Pin by Pin Description which shows the equivalent inter-  
nal circuit and external circuit requirements.  
For higher frequency operation, a series tuned oscillator con-  
figuration is recommended. Table 1 contains the S–parameters  
for the VCO transistor in a common collector configuration.  
This information is useful for designing a VCO at other operat-  
ing frequencies or for various other oscillator topologies.  
The output power (at Mix/Buf Out) can be varied by adjust-  
ing the value of R5 as illustrated in Figures 3 and 4. Figure 5  
shows the typical operating window for the prescaler.  
Current Regulation/Enable  
The device features temperature compensating, voltage inde-  
pendent current regulators which are controlled by the enable  
function in which “high” powers up the IC.  
Mixer: General  
The mixer is a double–balanced four quadrant multiplier  
biased class AB allowing for programmable linearity control  
via an external current source. An input third order intercept  
point of 20 dBm has been achieved. The mixer has a 50 sin-  
gle–ended RF input and open collector differential outputs. An  
onboard Local Oscillator transistor has the emitter, base and  
collector pinned out to implement a low phase noise VCO in  
various configurations. Additionally, a buffered prescaler out-  
put is provided for operation with a low frequency synthesizer.  
For direct conversion applications the input of the mixer may  
be terminated to ground through a 120 to 330 resistor.  
Local Oscillator/Voltage Control Oscillator  
The on–chip transistor operates with coaxial transmission  
line or LC resonant elements to over 1.8 GHz. Biasing is done  
with a temperature/voltage compensated current source in the  
emitter. A RFC from V  
to the base is recommended.The  
CC  
transistor can be operated in the classic Colpitts, Clapp, or  
Hartley configuration. The application circuit (Figure 8)  
depicts a parallel resonant VCO which can cover the entire 902  
to 928 MHz frequency band with phase noise of approximately  
–80 dBc/Hz at a 10 kHz offset (see Figure 2). For this configu-  
ration, the LO will be driven with approximately 100 mVrms,  
and the frequency of oscillation can be approximated by:  
Page 6 of 15  
www.lansdale.com  
Issue 0