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參數(shù)資料
| 型號： | RF2486 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | PCS LOW NOISE AMPLIFIER/MIXER |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO24 |
| 封裝： | SSOP-24 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 237K |
| 代理商： | RF2486 |
8-108
RF2486
Rev A7 010717
8
F
Application S chematic
1.96 GHz, 210MHz IF
Pin
20
Function
LNA OUT
Description
LNA output pin. This is an open-collector output. This pin is typically
connected to pin 22 through a bias/matching inductor. This inductor, in
conjunction with a series blocking/matching capacitor, forms a match-
ing network to the 50
image filter and provides bias (see application
schematic). The LNA’s IP3 may be increased 10dB by connecting pin
20 to V
CC
through the inductor. The LNA’s current then increases by
10mA. Other in-between IP3 versus I
CC
trade-offs may be made by
connecting resistance values between V
CC
and the matching inductor.
The two reference points for consideration are with 150
used, which
is what connection to pin 22 achieves, the input IP3 is +5.5dBm and the
LNA I
CC
is 5mA. Using no resistance, the input IP3 is +15.5 dBm and
the LNA I
CC
is 15 mA. Desired operating points in between these val-
ues may be roughly interpolated.
Same as pin 17.
Interface Schematic
21
22
GND8
VCC4
Output supply voltage for the LNA output (pin 20). This pin is typically
connected to pin 20 through a bias/matching inductor (see application
schematic). External RF bypassing is required. The trace length
between the pin and the bypass capacitor should be minimized. The
ground side of the bypass capacitor should connect immediately to
ground plane.
Same as pin 17.
See pin 2.
23
24
GND9
NC
No connection. This pin may be grounded (recommended) or left open.
LNA OUT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
2 pF
22 pF
BUF ENBL
1 k
100 pF
2.7 nH
R2
VCC
22 pF
4.7
μ
F
22 pF
LNA2 IN
1.8 nH
22 pF
MIX IN
LNA OUT
See evaluation
board
1 nF
22 pF
LO OUT
470 nH
470 nH
470 nH
100 pF
V
CC
SAW
Filter
IF SAW
Filter
1
2
LO IN
V
CC
1 nF
22 pF
22 pF
1 nF
V
CC
1 nF
22 pF
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| RF2488 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:MULTI-MODE DUAL-BAND LNA MIXER |
| RF2488-000 | 制造商:TE Connectivity 功能描述:TRF250-090UT - Bag |
| RF2489 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:DUAL-BAND/TRI-MODE CDMA LOW NOISE AMPLIFIER/MIXER |
| RF2489_07 | 制造商:RFMD 制造商全稱:RF Micro Devices 功能描述:DUAL-BAND/TRI-MODE CDMA LOW NOISE AMPLIFIER/MIXER |
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