RF2486 RF Micro Devices, RF2486 Datasheet - Page 4

• Manufacturer Part Number: RF2486
• Description: PCS LOW NOISE AMPLIFIER/MIXER
• Manufacturer: RF Micro Devices

8
8-108
BUF ENBL
Pin
20
21
22
23
24
RF2486
LNA2 IN
LO IN
V
V
CC
CC
LNA OUT
Function
GND8
GND9
VCC4
1 k
1 nF
1 nF
1 nF
NC
22 pF
22 pF
22 pF
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
schematic). The LNA’s IP3 may be increased 10dB by connecting pin
20 to V
10mA. Other in-between IP3 versus I
connecting resistance values between V
The two reference points for consideration are with 150
is what connection to pin 22 achieves, the input IP3 is +5.5dBm and the
LNA I
the LNA I
ues may be roughly interpolated.
Same as pin 17.
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.
No connection. This pin may be grounded (recommended) or left open.
22 pF
CC
CC
is 5mA. Using no resistance, the input IP3 is +15.5 dBm and
CC
2.7 nH
through the inductor. The LNA’s current then increases by
10
11
12
1
2
3
4
5
6
7
8
9
is 15 mA. Desired operating points in between these val-
Application Schematic
1.96GHz, 210MHz IF
image filter and provides bias (see application
CC
24
23
22
21
20
19
18
17
16
15
14
13
CC
trade-offs may be made by
and the matching inductor.
1.8 nH
470 nH
2 pF
used, which
470 nH
22 pF
22 pF
22 pF
470 nH
R2
SAW
Filter
See evaluation
100 pF
100 pF
board
Interface Schematic
See pin 2.
1 nF
1
2
IF SAW
Filter
22 pF
4.7 F
Rev A7 010717
LNA OUT
V
CC
VCC
LNA OUT
MIX IN
LO OUT