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AVAGO

ALM-1812 Datasheet Preview

ALM-1812 Datasheet

GPS Filter-LNA-Filter Front-End Module

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ALM-1812
GPS Filter-LNA-Filter Front-End Module
Data Sheet
Description
Avago Technologies’ ALM-1812 is a GPS front-end module
that combines a high-gain low-noise amplifier (LNA) with
GPS FBAR filters. 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
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 0.95 mm3 12-lead MCOB
NC (pin 1)
Gnd (pin 2)
RF in (pin 3)
Vsd NC
Vdd
(pin 12) (pin 11) (pin 10)
1812
YMXXXX
Gnd Gnd Gnd
(pin 4) (pin 5) (pin 6)
NC (pin 9)
RF Out (pin 8)
NC (pin 7)
NC (pin 9)
TOP VIEW
Vdd NC
Vsd
(pin 10) (pin 11) (pin 12)
NC (pin 1)
RF Out (pin 8)
Gnd (pin 2)
NC (pin 7)
Gnd
(pin 6)
Gnd
(pin 5)
Gnd
(pin 4)
RF in (pin 3)
BOTTOM VIEW
Note:
Package marking provides orientation and identification
“1812” = Product Code
“Y” = Year of manufacture
“M” = Month of manufacture
“XXXX”= Last 4 digit of lot number
Features
 Very Low Noise Figure
 Exceptional Cell/PCS-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
 4.5 x 2.2 x 0.95 mm3 size
 Adjustable bias current via single
resistor/voltage
 Lead-free, Halogen free and meets MSL3
Specifications (Typical performance @ 25°C)
At 1.575GHz, Vdd = 2.8V, Idd = 6.8mA
 Gain = 19.1 dB
 NF = 1.66 dB
 IIP3 = +2 dBm, IP1dB = -8 dBm
 S11 = -10 dB, S22 = -15 dB
 Cell-Band Rejection: > 90dBc
 PCS-Band Rejection: > 85dBc
Application
 GPS Front-end Module
Application Circuit
external
+Vdd = 2.8V
VBias
RBias L
RFin RFout




AVAGO

ALM-1812 Datasheet Preview

ALM-1812 Datasheet

GPS Filter-LNA-Filter Front-End Module

No Preview Available !

Absolute Maximum Rating [1] TA = 25°C
Symbol
Parameter
Vdd Device Drain to Source Voltage[2]
Idd Drain Current[2]
Pin,max
CW RF Input Power
(Vdd = 2.8V, Idd = 6mA)
Pdiss Total Power Dissipation[4]
TL Operating Temperature
Tj Junction Temperature
TSTG Storage Temperature
Units
V
mA
dBm
mW
°C
°C
°C
Absolute Max.
3.6
15
13
54
-40 to 85
150
-65 to 150
Thermal Resistance [3]
(Vdd = 2.8 V, Idd = 6mA) jc = 82.1°C/W
Notes:
1. Operation of this device in excess of any of
these limits may cause permanent damage.
2. Assuming DC quiescent conditions.
3. Thermal resistance measured using Infra-Red
measurement technique.
4. Board (module belly) temperature TB is 25°C.
Derate 4.2 mW/°C for TB > 145.6°C.
Electrical Specifications
TA = 25°C, Freq = 1.575GHz, measured on demo board[1] unless otherwise specified – Typical Performance[1]
Table 1. Performance at Vdd = Vsd = 2.8V, Idd = 6.8mA (R2 = 3.9k Ohm, see Fig 1) nominal operating conditions
Symbol
G
NF
IP1dB
IIP3[2]
S11
Parameter and Test Condition
Gain
Noise Figure
Input 1dB Compressed Power
Input 3rd Order Intercept Point (2-tone @ Fc +/- 2.5MHz)
Input Return Loss
Units Min.
dB 16.5
dB –
dBm –
dBm –
dB –
Typ
19.1
1.66
-8
+2
-10
S22 Output Return Loss
dB –
-15
S12 Reverse Isolation
dB –
-30
Cell Band Rejection Relative to 1.575GHz @ 827.5MHz
dBc 78
96.6
PCS Band Rejection
IP1dB890MHz
IP1dB1885MHz
Idd
Ish
Relative to 1.575GHz @ 1885MHz
Input 1dB gain compression interferer signal level at 890MHz
Input 1dB gain compression interferer signal level at 1885MHz
Supply DC current at Shutdown (SD) voltage Vsd = 2.8V
Shutdown Current @ VSD = 0V
dBc 78
dBm
dBm
mA –
uA –
91.7
29
26
6.8
0.5
Max.
2.3
11.5
Table 2. Performance at Vdd = Vsd = 1.8V, Idd = 4mA (R2 = 3.9k Ohm, see Fig 1) nominal operating conditions
Symbol
G
NF
IP1dB
IIP3[2]
S11
S22
S12
Cell Band Rejection
PCS Band Rejection
IP1dB890MHz
IP1dB1885MHz
Idd
Ish
Parameter and Test Condition
Gain
Noise Figure
Input 1dB Compressed Power
Input 3rd Order Intercept Point (2-tone @ Fc +/- 2.5MHz)
Input Return Loss
Output Return Loss
Reverse Isolation
Relative to 1.575GHz @ 827.5MHz
Relative to 1.575GHz @ 1885MHz
Input 1dB gain compression interferer signal level at 890MHz
Input 1dB gain compression interferer signal level at 1885MHz
Supply DC current at Shutdown (SD) voltage Vsd = 1.8V
Shutdown Current @ VSD = 0V
Units
dB
dB
dBm
dBm
dB
dB
dB
dBc
dBc
dBm
dBm
mA
uA
Typ
16.5
1.9
-11
-1
-9
-13
-29
>90
>85
29
26
4
0.5
Notes:
1. Measurements at 1.575GHz obtained using schematic described in Figure 1 below.
2. 1.575GHz IIP3 test condition: FRF1 = 1572.5 MHz, FRF2 = 1577.5 MHz with input power of -20dBm per tone measured at the worst case side band.
2


Part Number ALM-1812
Description GPS Filter-LNA-Filter Front-End Module
Maker AVAGO
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