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PDF RF2444 Data sheet ( Hoja de datos )
| Número de pieza | RF2444 | |
| Descripción | HIGH FREQUENCY LNA/MIXER | |
| Fabricantes | RF Micro Devices | |
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RF2444
8 HIGH FREQUENCY LNA/MIXER
Typical Applications
• WLAN or Wireless Local Loop
• Part of 2.4GHz Chipset
• Digital Communication Systems
• Portable Battery-Powered Equipment
• Spread-Spectrum Communication Systems • UHF Digital and Analog Receivers
Product Description
The RF2444 is a monolithic integrated UHF receiver front
end suitable for 2.4GHz ISM band applications. The IC
contains all of the required components to implement the
RF functions of the receiver except for the passive filter-
ing and LO generation. It contains an LNA (low-noise
amplifier), a second RF amplifier and a doubly balanced
mixer. The output of the LNA is made available as an out-
put to permit the insertion of a bandpass filter between
the LNA and the RF/Mixer section. The mixer outputs can
be selectively disabled to allow for the IF filter to be used
in the transmit mode.
4.90
+ 0.20
8° MAX
0° MIN
3.90
+ 0.10
0.25
+ 0.05
0.65
-A-
0.05
+ 0.05
Note 3
NOTES:
1. Shaded lead is pin 1.
2. Lead coplanarity - 0.10 with
respect to datum "A".
3. Lead standoff is specified from the
lowest point on the package underside.
6.00
+ 0.20
Dimensions in mm.
1.40
+ 0.10
0.60
+ 0.15
3.302
0.24
0.20
2.286
EXPOSED DIE
FLAG
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
GAIN SEL 1
LNA IN 2
PD 3
VCC1 4
VCC2 5
MIX OUT- 6
MIX OUT+ 7
LO IN 8
LNA
Bias
Circuits
RF AMP
MIXER
BACKSIDE GND
16 VCC4
15 LNA OUT
14 NC
13 NC
12 MIXIN
11 GND3
10 VCC3
9 RX EN
Package Style: SSOP-16 EDF Slug
Features
• Single 2.7V to 3.6V Power Supply
• 2400MHz to 2500MHz Operation
• Two Gain Settings: 28dB or 12dB
• 4.5dB Cascaded NF, High Gain Mode
• 20mA DC Current Consumption
• Input IP3: -23dBm or -8dBm
Ordering Information
RF2444
High Frequency LNA/Mixer
RF2444 PCBA-H Fully Assembled Evaluation Board (2.5GHz)
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
8
Rev A3 010717
8-53
1 page  
RF2444
Pin
13
14
15
16
Function
NC
NC
LNA OUT
VCC4
Description
Interface Schematic
RF signal output for external 50Ω filtering.The use of a filter here is
optional but does provide for lower noise floor and better out-of-band
rejection.
Supply voltage for the LNA. This pin should be bypassed with a 10 pF
capacitor to ground as close to the pin as possible. The shunt induc-
tance from this pin to ground via the supply decoupling must be tuned
to match the LNA output to 50Ω at the desired operating frequency.
See pin 16.
Microstrip
VCC4 -16 dB
P2
LNA IN
BIAS
EXTERNAL
DECOUPLING
P15
LNA OUT
P1
GAIN SEL
8
Rev A3 010717
8-57
5 Page 
15.00
14.50
14.00
13.50
LNA + Mixer Gain versus RF Frequency (3.3 V),
Attenuator On
-40C Gain
25C Gain
85C Gain
13.00
12.50
12.00
11.50
11.00
10.50
10.00
9.50
9.00
2.40
2.45
RF Frequency (GHz)
2.50
LNA + Mixer SSB Noise Figure versus VCC (2.45 GHz),
Attenuator Off
5.6
25C NF
85C NF
5.4
-40C NF
5.2
5.0
4.8
4.6
4.4
2.7
3.0 3.3
VCC
3.6
LNA + Mixer SSB Noise Figure versus VCC (2.45 GHz),
Attenuator On
19.8
25C NF
19.6
85C NF
19.4 -40C NF
19.2
19.0
18.8
18.6
18.4
18.2
18.0
17.8
2.7
3.0 3.3
VCC
3.6
Rev A3 010717
RF2444
LNA + Mixer IIP3 versus RF Frequency (3.3 V),
Attenuator On
-7.00
-40C IIP3
-7.50
25C IIP3
85C IIP3
-8.00
-8.50
-9.00
-9.50
-10.00
-10.50
-11.00
2.40
5.50
5.00
2.45
RF Frequency (GHz)
2.50
LNA + Mixer SSB Noise Figure versus
RF Frequency (3.3 V), Attenuator Off
25C NF
85C NF
-40C NF
4.50
8
4.00
3.50
3.00
2.40
20.00
19.00
18.00
2.45
RF Frequency (GHz)
LNA + Mixer SSB Noise Figure versus
RF Frequency (3.3 V), Attenuator On
25C NF
85C NF
-40C NF
17.00
16.00
15.00
14.00
13.00
2.40
2.45
RF Frequency (GHz)
2.50
2.50
8-63
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RF2444.PDF ] | |
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