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PDF ALM-1712 Data sheet ( Hoja de datos )
| Número de pieza | ALM-1712 | |
| Descripción | GPS Filter-LNA-Filter Front-End Module | |
| Fabricantes | AVAGO | |
| Logotipo |  |
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ALM-1712
GPS Filter-LNA-Filter Front-End Module
Data Sheet
Description
Avago Technologies’ ALM-1712 is a GPS front-end module
that combines a low-noise amplifier (LNA) with GPS FBAR
filters. The LNA uses Avago Technologies’proprietary 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 integrated filter
utilizes an Avago Technologies’ leading-edge FBAR filter
for exceptional rejection at Cell/PCS-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 4.5 x 2.2 x 1 mm3 12-lead MCOB
RF in (pin 1)
Gnd (pin 2)
Gnd (pin 3)
TOP VIEW
Gnd Vdd Gnd
(pin 12) (pin 11) (pin 10)
1712
YMXXXX
Gnd Vsd Gnd
(pin 4) (pin 5) (pin 6)
Gnd (pin 9)
RF Out (pin 8)
Gnd (pin 7)
Gnd (pin 9)
Gnd Vdd Gnd
(pin 10) (pin 11) (pin 12)
RF in (pin 1)
RF Out (pin 8)
Gnd (pin 7)
BOTTOM VIEW
Gnd
(pin 6)
Vsd
(pin 5)
Gnd (pin 2)
Gnd (pin 3)
Gnd
(pin 4)
Note:
Package marking provides orientation and identification
“1712” = Product Code
“Y” = Year of manufacture
“M” = Month of manufacture
“XXXX” = Last 4 digit of lot number
Features
Very Low Noise Figure : 1.65 dB typ
Exceptional Cell/PCS-Band rejection
Advanced GaAs E-pHEMT & FBAR Technology
Low external component count
Shutdown current : < 1 uA
CMOS compatible shutdown pin (SD)
ESD : > 3kV at RFin pin
1mm typical thickness
Adjustable bias current via single external resistor/
voltage
Useable down to 1.0V supply voltage
Small package dimension: 4.5(L)x2.2(W)x1(H) mm3
Meets MSL3, Lead-free and halogen free
Specifications (Typical performance @ 25°C)
At 1.575GHz, Vdd = 2.7V, Idd = 8.0mA
Gain = 12.8 dB
NF = 1.65 dB
IIP3 = +7 dBm, IP1dB = +3 dBm
S11 = -9 dB, S22 =-10 dB
Cell-Band Rejection: > 95dBc
PCS-Band Rejection: > 90dBc
Application
GPS Front-end Module
Attention: Observe precautions for
handling electrostatic sensitive devices.
For RF_IN (Pin 1): ESD Human Body Model = 3 kV
All other pins: ESD Machine Model = 40 V
ESD Human Body Model = 250 V
Refer to Avago Application Note A004R:
Electrostatic Discharge, Damage and Control.
1 page  
Vdd (Pin 3)
R1 L1
C2 L2
Vdd
C1
50 -Ohms TL
RFin
Filter LNA
Filter
Vsd (Pin 2)
Vsd
R2
C3
RFout
50 -Ohms TL
Figure 2. Demoboard and application schematic diagram
Notes
The module is fully matched at the input and output RF pins. The RFinput pin, pin1, is directly connected to a shunt inductor that is grounded. The
RF output filter blocks DC. Best noise performance is obtained using high-Q wirewound inductors. This circuit demonstrates that low noise figures
are obtainable with standard 0402 chip inductors.
C2 and L2 form a matching network that affects the frequency response and linearity of the LNA, these can be tuned to optimize gain and return
loss.
L1 and R1 isolates the demoboard from external disturbances during measurement. It is not needed in actual application. Likewise, C1 and C3
mitigate the effect of external noise pickup on the Vdd and Vsd lines respectively. These components are not required in actual operation.
Bias control is achieved by either varying the Vsd voltage with/ without R2, or fixing the Vsd voltage to Vdd and adjusting R2 for the desired current.
5
5 Page 
ALM-1712 Scattering Parameter and Measurement Reference Planes
R1 L1 C1
C2
1
L2
11
LNA
8
REFERENCE
PLANE
GPS FILTER
R2
5
C3
GPS FILTER
REFERENCE
PLANE
MODULE
Figure 22. Scattering parameter measurement reference planes
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ALM-1712.PDF ] | |
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