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RF2413 参数 Datasheet PDF下载

RF2413图片预览
型号: RF2413
PDF下载: 下载PDF文件 查看货源
内容描述: 增益可调DUAL-转换正交调制器 [GAIN CONTROLLED DUAL-CONVERSION QUADRATURE MODULATOR]
分类和应用: 射频微波
文件页数/大小: 10 页 / 180 K
品牌: RFMD [ RF MICRO DEVICES ]
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RF2413  
Pin  
1
Function Description  
Interface Schematic  
Supply Voltage for the RF Output Stage only. A 33pF external bypass  
capacitor is required and an optional 0.1µF will be required if no other  
low frequency bypass capacitors are nearby. The trace length between  
the pin and the bypass capacitors should be minimized. The ground  
side of the bypass capacitors should connect immediately to ground  
plane.  
VDD2  
Though the part is designed to run from a 5V supply, it will work at 3V.  
Gain and available output power will be reduced by 5 to 10dB. This also  
means that the part is sensitive to unintended power supply variation.  
Power supply voltage should be kept constant, or another way of main-  
taining constant output power is required.  
Supply Voltage for all circuits except the RF Output Stage. The same  
comments as for VDD2 apply to this pin.  
2
3
VDD1  
PD  
Power Down control. When this pin is 0V all circuits are turned off, and  
when this pin is VDD all circuits are operating. This is a high impedance  
input, internally connected to the gates of a few FETs. To minimize cur-  
rent consumption in power down mode, this pin should be as close to  
0V as possible. Turn-on voltage of some parts of the circuit may be as  
low as 0.1V. In order to maximize output power this pin should be as  
close to VDD as possible during normal operation.  
VDD1  
VDD2  
5
PD  
Baseband input to the I mixer. This pin is DC coupled. Maximum output  
power is obtained when the input signal has a peak to peak amplitude  
of 5V. The DC level supplied to this pin should be VDD2/2. Input imped-  
ance of this pin is about 3k.  
4
5
6
I SIG  
I REF  
Q REF  
I SIG  
Reference voltage for the I mixer. This voltage should be the same as  
the DC voltage supplied to the I SIG pin. To obtain a carrier suppres-  
sion of better than 25dB it may be tuned 0.15V (relative to the I SIG  
DC voltage). Without tuning it will typically be better than 25dB. Input  
impedance of this pin is about 3k.  
I REF  
Reference voltage for the Q mixer. This voltage should be the same as Same as pin 5.  
the DC voltage supplied to the Q SIG pin. To obtain a carrier suppres-  
sion of better than 25dB it may be tuned 0.15V (relative to the Q SIG  
DC voltage). Without tuning, the carrier suppression will typically be  
better than 25dB. The input impedance of this pin is about 3 k.  
Baseband input to the Q mixer. This pin is DC coupled. Maximum out- Same as pin 4.  
put power is obtained when the input signal has a peak to peak ampli-  
tude of 5V. The DC level supplied to this pin should be VDD2/2. Input  
impedance of this pin is about 3k.  
7
8
Q SIG  
GC1  
Gain control of the IF input amplifier. This pin, when used as the only  
gain control, will give a 30dB control range. When used together with  
GCx  
GC2, a 60dB range is available. When this pin is at 1.8V or lower, the  
gain is set to the minimum; when this pin is at 3.8V or above, the gain is  
set to the maximum; see the plot below for typical characteristics. If  
fixed maximum output level is required, it is recommended to connect  
this pin to VDD. There are no provisions in the chip for limiting the  
bandwidth of the gain control, so very fast response times are avail-  
able. If a slower response is desired, an external capacitor can be  
added.  
Gain control for the RF output amplifier. This pin has the same control Same as pin 8.  
characteristics as GC1.  
9
GC2  
5-22  
Rev B3 990419