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ALM-1912 Datasheet

GPS Filter-LNA Front-End Module

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ALM-1912
GPS Filter–LNA Front–End Module
Data Sheet
Description
Avago Technologies’ ALM-1912 is a GPS front-end module
that combines a GPS FBAR filter with high-gain low-noise
amplifier (LNA).The LNA uses Avago Technologies’ pro-
prietary GaAs Enhancement-mode pHEMT process to
achieve high gain with very low noise figure and high
linearity. Noise figure distribution is very tightly controlled.
A CMOS-compatible shutdown pin is included either for
turning the LNA on/off or for current adjustment. The
filter use Avago Technologies’ leading-edge FBAR filter for
low GPS band insertion loss and exceptional rejection at
Cellular, PCS and WLAN band frequencies.
The low noise figure and high gain, coupled with low current
consumption make it suitable for use in critical low-power
GPS applications or during low-battery situations.
Component Image
Surface Mount 2.9 x 2.0 x 0.95 mm3 9-lead MCOB
RF In (pin 1)
Gnd
(pin 9)
Vsd
(pin 8)
Vdd (pin 7)
Gnd (pin 2)
1912
WWYY
Gnd
(pin 3)
Gnd
(pin 4)
Top View
RF Out (pin 6)
NC (pin5)
Vdd (pin 7)
Vsd
(pin 8)
Gnd
(pin 9)
RF In (pin 1)
RF Out (pin 6)
NC (pin 5)
Gnd
(pin 4)
Gnd
(pin 3)
Gnd (pin 2)
Bottom View
Note:
Package marking provides orientation and identification
“1912” = Product Code
“YY” = Year of manufacture
“WW” = Work week of manufacture
Features
Very Low Noise Figure
Exceptional Cell/PCS/WLAN-Band rejection
Low external component count
Fully-matched at RF input and RF output
Shutdown current : < 1 uA
CMOS compatible shutdown pin (SD)
ESD : > 3kV at RFin pin
2.9 x 2.0 x 0.95 mm size
Adjustable bias current via single external resistor/
voltage
Lead-free and Halogen free
Specifications (Typical performance @ 25°C)
At 1.575GHz, Vdd = 2.7V, Idd = 6mA
Gain = 19.3 dB
NF = 1.62 dB
IIP3 = +1.5 dBm
IP1dB = -8 dBm
S11 = -9.5 dB
S22 =-13.5 dB
Cell-Band Rejection: > 57dBc
PCS-Band Rejection: > 53dBc
WLAN-Band Rejection: > 52dBc
Application
GPS Front-end Module
Application Circuit
VBias
RBias
+Vdd = 2.7V
L
RFin
GPS
Filter
LNA
RFout
AVAGO
AVAGO



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