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參數(shù)資料
| 型號： | HFA3665 |
| 廠商： | Intersil Corporation |
| 英文描述： | 288 MACROCELL 5 VOLT ISP CPLD - NOT RECOMMENDED for NEW DESIGN |
| 中文描述： | 碼分多址/ AMPS二元變頻器帶AGC能力 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大小： | 73K |
| 代理商： | HFA3665 |
2
Pin Descriptions
PIN NUMBER
NAME
DESCRIPTION
1
V
CC
LNA and PIN diode bias control Power Supply.Use high quality RF decoupling capacitors
at the pin.
2
AGC_CTRL
AGC control current input pin. Requires a 9.53K 1% resistor for scale factor and tempera-
ture compensation of the current sources.
3
PIN_O_IBIAS1
Current output for a PIN diode bias control. Use a 2200pF filter capacitor to ground.
4
GND
LNA bias ground return.
5, 6
LNA_OUT
LNA open collector output. This pins are internally bonded to the same device output.
7, 8
GND
LNA RF ground return. Degeneration (inductance) can be added to this pin.
9
LNA_IN
LNA input.
10
PIN_O_IBIAS2
Second current output for PIN diode bias control. Use a 2200pF filter capacitor to ground.
11
PIN_I_GND
PIN diode bias control ground return.
12
RX_PE
Power enable control input. HIGH for normal operation. LOW for power down.
13
R_REF
Bias setting resistor. 523
1% for optimum performance and parameter distribution.
14
BIAS_GND
Reference circuit ground return.
15
BIAS_V
CC
Reference circuit Power Supply. Use high quality RF decoupling capacitors right at the pin.
16
FM_OUT+
Positive IF FM output. Open collector PNP. Requires a DC return to ground.
17
FM_OUT-
Negative IF FM output. Open collector PNP. Requires a DC return to ground.
18
CDMA_OUT+
Positive IF CDMA output. Open collector PNP. Requires a DC return to ground.
19
CDMA_OUT-
Negative IF CDMA output. Open collector PNP. Requires a DC return to ground.
20
LO_IN
Mixer Local Oscillator input. Requires AC coupling and directly matches to 50
.
21
LO_RET
Mixer Local Oscillator complementary input. Requires a bypass capacitor to ground as a
return reference.
22
MIX_GND
Mixer ground return.
23
RF_RET
MIxer RF port complementary input. Requires a bypass capacitor to ground as a return ref-
erence.
24
RF_IN
Mixer RF input. Requires AC coupling and a match network to 50
.
25
MIX_IND
Mixer common mode bias inductor. Use a RF choke to ground with high impedance at
900MHz. Low loss inductors with parallel resonance close to 900MHz are ideal.
26, 28
MIX_V
CC
Mixer Power Supply Pins.Use high quality RF decoupling capacitors at each one of the
pins.
27
SEL
Selects the CDMA or the FM output IF amplifier. HIGH selects the CDMA amplifier. LOW
the FM amplifier output.
HFA3665
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