MC13821-2400EVK Freescale Semiconductor, MC13821-2400EVK Datasheet - Page 19

• Manufacturer Part Number: MC13821-2400EVK
• Description: RF Modules & Development Tools LNA W/BYPASS SWITCH
• Manufacturer: Freescale Semiconductor

Specifications of MC13821-2400EVK

• Product: RF Modules
• Maximum Frequency: 2400 MHz
• Supply Voltage (max): 3.3 V

3.3
These application circuits demonstrate performance at 2140 MHz. Resistor values for R1 and R2 are varied
to adjust I
a particular parameter, but usually at the expense of another. Typical performance that can be expected
from this circuit at 2.75 V V
requirements for IP3 and I
1960 MHz application circuit, with a highpass match on the output and a simple inductor-capacitor
network on the LNA input.
Freescale Semiconductor
R1 = 1.2 kΩ, R2 = 3.3 kΩ (Refer to
Frequency
Power Gain
Output Third Order Intercept Point
High Gain
Bypass
High Gain
Bypass
CC
2140 MHz Application
, which also adjusts IP3 performance. Matching component values can be changed to enhance
Vcc1
OUT
LNA
Characteristic
(Resistor values of R1 and R2 are changed for different I
2.7 nH
.01uf
C5
L2
0.9pf
Table 8. Typical 2140 MHz LNA Demo Board Performance
C2
CC
33 pf
CC
Vcc3
C6
Figure 11. 2140 MHz LNA Application Schematic
. The same matching networks are used on the 2140 MHz circuit as on the
33 pf
.01uf
NC
Figure
C3
C4
is listed in
3.3 k
R2
MC13821 Data Sheet: Technical Data, Rev. 1.5
1
2
3
11)
Table
R1
2 k
Rbias
NC
12
8. Three variations of the circuit are realized for different
4
Symbol
OIP3
G
f
2140 MHz
MC13821
LNA
NC
11
5
4.3 nH
L1
NC
10
14.7
18.2
6
Min
-4.4
—
13
Logic
CC
and IP3 requirements.)
33pF
C1
LNA IN
2140
15.7
20.7
16.4
Typ
-3.4
9
8
7
Enable
Gain
Gnd
Application Information
Max
16.7
22.7
18.5
-2.5
—
MHz
dBm
Unit
dB
19