ALM-2712-TR1G Avago Technologies US Inc., ALM-2712-TR1G Datasheet - Page 12

• Manufacturer Part Number: ALM-2712-TR1G
• Description: Nigel Filter, LNA, Filter
• Manufacturer: Avago Technologies US Inc.

Specifications of ALM-2712-TR1G

• Current - Supply: 20mA
• Frequency: 1.575GHz
• Gain: 14.2dB
• Noise Figure: 1.26dB
• P1db: 2dBm
• Package / Case: 12-PowerVQFN, 12-MCOB
• Rf Type: GPS
• Test Frequency: 1575.42MHz
• Voltage - Supply: 2.7V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ALM-2712 module with differential output
A differential output can be implemented for the ALM-2712 using the schematic shown below. Suggested component
values are listed in Table 3. C1, C2 and L1, L2 are to convert the single-ended output to differential outputs while C3, C4
and L3 provide matching to 100 ohm differential impedance.
Figure 30. Proposed Balun design for ALM-2712
Table 3. Components table for proposed balun design
12
Circuit Symbol
C1
C2
C3
C4
L1
L2
L3
BIAS
Vsd
BIAS
Size
0402
0402
0402
0402
0402
0402
0402
Description
GRM1555C1H1R5CZ01 - 1.5pF (Murata)
GRM1555C1H1R5CZ01 - 1.5pF (Murata)
GRM1555C1H101JZ01 – 100pF (Murata)
GRM1555C1H101JZ01 – 100pF (Murata)
LQG15HN6N2S02B – 6.2nH (Murata)
LQG15HN6N2S02B – 6.2nH (Murata)
LQG15HN56NJ02 – 56nH (Murata)
Vdd
12 ohm
0.1uF
L1
C1
C2
L2
C3
C4
L3