plerow
TM
ALN1951BT
Internally Matched LNA Module
Features
·
S
21
= 15.3 dB @ 1920 MHz
= 14.7 dB @ 1980 MHz
·
NF of 0.9 dB over Frequency
·
Unconditionally Stable
·
Single 5V Supply
·
High OIP3 @ Low Current
Description
The plerow
TM
ALN-series is the compactly designed surface-mount
module for the use of the LNA with or without the following gain blocks in
the infrastructure equipment of the mobile wireless (CDMA, GSM, PCS,
PHS, WCDMA, DMB, WLAN, WiBro, WiMAX), GPS, satellite communi-
cation terminals, CATV and so on. It has an exceptional performance of
low noise figure, high gain, high OIP3, and low bias current. The stability
factor is always kept more than unity over the application band in order
to ensure its unconditionally stable implementation to the application
system environment. The surface-mount module package including the
completed matching circuit and other components necessary just in case
allows very simple and convenient implementation onto the system
board in mass production level.
C
C
C
o
o
o
u
u
u
pl
pl
pl
er
er
er
C
o
o
u
u
pl
pl
er
Specifications (in Production)
Typ. @ T = 25C, V
s
= 5 V, Freq. = 1950 MHz, Z
o.sys
= 50 ohm
Parameter
Frequency Range
Gain
Gain Flatness
Noise Figure
Output IP3
(1)
S11 / S22
(2)
Output P1dB
Switching Time
Supply Current
Supply Voltage
Impedance
Max. RF Input Power
Package Type & Size
Unit
MHz
dB
dB
dB
dBm
dB
dBm
sec
mA
V
dBm
mm
Specifications
Min
1920
14
15
0.3
0.90
30
31
-18 / -14
16
17
-
50
5
50
C.W 23 ~ 25 (before fail)
Surface Mount Type, 10Wx10Lx3.8H
60
0.5
0.95
Typ
Max
1980
1-stage Single Type
More Information
Website: www.asb.co.kr
E-mail: sales@asb.co.kr
Tel: (82) 42-528-7223
Fax: (82) 42-528-7222
Operating temperature is -40C to +85C.
1) OIP3 is measured with two tones at an output power of 7 dBm / tone separated by 1 MHz.
2) S11/S22 (max) is the worst value within the frequency band.
3) Switching time means the time that takes for output power to get stabilized to its final level after switching DC voltage from 0 V to V
S
.
Outline Drawing (Unit: mm)
Pin Number
2
5
Function
RF In
RF Out
+Vcc
Ground
plerow
ALN1951BT
ASB Inc.
(Top View)
Solder Stencil Area
(Bottom View)
6
Others
Note: 1. The number and size of ground via holes in
a circuit board is critical for thermal RF
grounding considerations.
2. We recommend that the ground via holes be
placed on the bottom of all ground pins for
better RF and thermal performance, as
shown in the drawing at the left side.
(Side View)
Ø
0.4 plated thru holes to ground plane
(Recommended Footprint)
1/4
www.asb.co.kr
November 2008
plerow
TM
ALN1951BT
Internally Matched LNA Module
Application Circuit
V
DC
+
-
Tantal
Capacitor
IN
C1
ALN
C2
OUT
1) The tantal capacitor is optional and for bypassing the AC noise introduced from the DC supply.
The capacitance value may be determined by customer’s DC supply status.
2) So-called DC blocking capacitors are always necessarily placed at the input and output port
for allowing only the RF signal to pass and blocking the DC component in the signal. The DC
blocking capacitors are included inside the LNA module. Therefore, C1 & C2 capacitors may
not be necessary, but can be added just in case that the customer wants. The value of C1 &
C2 is determined by considering the application frequency.
Recommended Soldering Reflow Process
260C
20~40 sec
Evaluation Board Layout
+Vcc
Ramp-up
(3˚C/sec)
200C
Ramp-down
(6C/sec)
IN
OUT
150C
60~180 sec
Size 25 x 25mm
(for ALN-AT, BT, T Series – 10x10mm)
4/4
www.asb.co.kr
November 2008
FPGA/CPLD
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