HFA3664 查看數據表（PDF） - Intersil
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HFA3664 Datasheet PDF : 5 Pages
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Typical Application Circuit
HFA3664
VCC = 5.0V
7pF
C1
2.2µF
C2
3300pF
RF OUTPUT
50Ω
C3
330pF
C4
7pF
7pF
C5
22pF
C7
7pF
C8
330pF
PRE_VCC3
1
GND
2
PRE_OUT
3
GND
4
PRE_VCC2
5
GND
6
BIAS_VCC
7
4.7nH
GND
8
PRE_IN
9
PRE_VCC1
10
7pF
AGC CONTROL
NOTE 5
50Ω BPF
LO REJECT
FILTER
TRANSMIT
ENABLE
TX_PE
20
LO_BY C9
19
LO_IN 7pF
18
17 GND
NOTE
4
IF_IN
16
1.69K
IF_BY C12
15
3300pF
GND
14
TXM_RF
13
MIX_VCC
12
AGC_CTRL
11
330pF
330pF
7pF
C10
C11
3300pF
C13
7pF
C14
7pF
LO INPUT
50Ω
IF INPUT
50Ω
C15
3300pF
AGC
CONTROL
NOTE 5
NOTES:
4. Required external resistor for Mixer biasing. Value optimized for 2.7mA bias current with R = (VCC - 0.93) /2.7mA. Most Mixer cell characteristics
like Gain, NF etc., can be affected when biasing is outside the optimum value.
5. The combination of these attenuator pads and the Band Pass Filter insertion loss shall bring the overall Cascaded Gain at the desired frequency
of operation from 21dB to 22dB for best performance. The selection of these values is optional. The total gain, LO feedthru, Mixer and Pre-
amplifier interaction (stability) and output compression point performances can be manipulated according to the user needs.
4-5
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