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Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 17

Technical content

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 ALM-1912 GPS Filter–LNA Front–End Module Data Sheet Note: Package marking provides orientation and identification “1912” = Product Code “YY” = Year of manufacture “WW” = Work week of manufacture RFin RFout +Vdd = 2.7VVBias LRBias GPS Filter LNA Top View RF In (pin 1) Gnd (pin 2) Gnd (pin 3) Gnd (pin 4) NC (pin5) RF Out (pin 6) Vdd (pin 7) Gnd (pin 9) Vsd (pin 8) Bottom View Gnd (pin 9) Vsd (pin 8) Vdd (pin 7) Gnd (pin 2) RF In (pin 1) NC (pin 5) RF Out (pin 6) Gnd (pin 3) Gnd (pin 4) 1912 WWYY

Absolute Maximum Rating[1] TA=25°C Symbol Parameter Units Absolute Max. Vdd Device Frain to Source Voltage [2] V 4.5 Idd Drain Current [2] mA 15 Pin,max CW RF Input Power (Vdd = 2.7V. Idd = 6mA) dBm 13 Pdiss Total Power Dissipation[4] mW 54 TL Operating Temperature °C -40 to 85 Tj Junction Temperature °C 150 TSTG Storage Temperature °C -65 to 150 Thermal Resistance [3] (Vdd = 2.7V, Idd = 6mA), θjc = 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 T B is 25°C. Derate 4.2 mW/°C for TB>145.6°C.

Table 1. Performance at Vdd = Vsd = 2.7V, Idd = 6mA (R2 = 4.7k Ohm, see Fig 7) nominal operating conditions Symbol Parameter and Test Condition Units Min. Typ Max. Table 2. Performance at Vdd = Vsd = 1.8V, Idd = 4mA & Vdd = Vsd = 2.8V, Idd = 4mA (for R2 value, see Fig 7) nominal operating

  1. Measurements at 1.575GHz obtained using schematic described in Figure 7 & 8 below.
  2. 1.575GHz IIP3 test condition: FRF1 = 1572.5 MHz, FRF2 = 1577.5 MHz with input power of -30dBm per tone measured at the worst case side band

Figure 2. Demoboard and application circuit components table

Figure 3. Demoboard and application schematic diagram

  • The module is fully matched at the input and output RF pins. Both these pins also have built-in coupling and DC-blocking capacitors. 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. 2.8V. Vsd(Pin 2, 3, 4, 5, 9) RFin (Pin 1) RFout (Pin 6) 50-Ohms TL 50-Ohms TL Vsd (Pin 8) GPS Filter Vdd Vdd (Pin 7) C1L2C2 R1 L1 LNA

-80 -70 -50 -60 -40 -30 -20 -10 0.5 1 1.5 2 2.5 3 3.5 4 Freq(GHz) Gain(dB) -20 -15 -10 -50 -40 -30 -20 -10 Freq(GHz) Gain(dB) -25 -20 -15 -10 -80 -70 -60 -50 -40 -30 -20 -10 0.5 1 1.5 2 2.5 3 3.5 4 Freq(GHz) Gain(dB) -20 -15 -10 -50 -40 -30 -20 -10 Freq(GHz) Gain(dB) -30 -25 -20 -15 -10

10 Return Loss

ALM-1912 Typical Performance Curves at 25° Figure 3a. Typical S-Parameter Plot @ Vdd = 2.7V, Idd = 6mA Figure 4b. Passband response of typical S-Parameter Plot @ Vdd = 1.8V, Idd = 4mA Figure 4a. Typical S-Parameter Plot @ Vdd = 1.8V, Idd = 4mA Figure 3b. Passband response of typical S-Parameter Plot @ Vdd = 2.7V, Idd = 6mA

Figure 27. Scattering parameter measurement reference planes

ALM-1912 Typical Scattering Parameters at 25°C, Vdd = 2.7V, Idd = 6mA The S- and Noise Parameters are measured using a coplanar waveguide PCB with 10 mils Rogers RO4350. Figure 33 shows the input and output reference planes. The circuit values are as indicated in Figure 7. Freq (GHz) S11 S11 S21 S21 S12 S12 S22 S22

ALM-1912 Typical Scattering Parameters at 25°C, Vdd = 1.8V, Idd = 4mA Freq (GHz) S11 S11 S21 S21 S12 S12 S22 S22

ALM-1912 Typical Noise Parameters at 25°C, Freq = 1.575 GHz, Vdd = 2.7V, Idd = 6mA Freq (GHz) Fmin (dB) GAMMA OPT Mag Ang Rn/50 1.575 1.43 0.23 -108 0.15 ALM-1912 Typical Noise Parameters at 25°C, Freq = 1.575 GHz, Vdd = 1.8V, Idd = 4mA Freq (GHz) Fmin (dB) GAMMA OPT Mag Ang Rn/50 1.575 1.57 0.17 -103 0.16 Notes: The exceptional noise figure performance of the ALM-1912 is due to its highly optimized design. In this regard, the Fmin of the ALM-1912 shown above is locked down by the internal input pre-match. This allows the use of relatively inexpensive chip inductors for external matching. Part Number Ordering Information Part Number Qty Container ALM-1912-BLKG 100 7" Reel ALM-1912-TR1G 3000 13” Reel Package Dimensions Notes: 1. All dimensions are in millimeters. 2. Dimensions are inclusive of plating. 3. Dimensions are exclusive of mold flash and metal burr. 4. Y refers to Year, W refers to Work Week. Top View Side View Bottom View Pin 1 Orientation 0.600 0.530 0.600 0.530 0.750 0.750 0.160 0.1850.310 0.310 0.830 0.100 all edges 0.800 0.55 1.000 0.55 0.300sq -9x 0.100 1.031 0.070 (all gaps) 0.30 0.340 2.90 ± 0.10 2.00 ± 0.10 0.95 ± 0.10 1912 WWYY

PCB Land Patterns and Stencil Design Land Pattern Stencil Opening Combination of Land Pattern & Stencil Opening 0.53 0.60 0.53 0.60 0.801.00 0.75 0.75 0.30 0.30 2.70 1.800.55 2.67 0.53 0.60 1.77 0.75 0.75 0.90 0.64 0.430.20 0.395 0.600.53 0.495 2.70 0.53 0.60 0.30-9x 0.75 0.75 0.600.53 0.27-9x 1.00 0.80 0.35 0.35 Dimensions are in mm

Notes: 1. 10 sprocket hole pitch cumulative tolerance ±0.2 2. Camber in compliance with EIA 481 3. Pocket position relative to sprocket hole measured as true position of pocket, not pocket hole 4. Ao and Bo are calculated on a plane at a distance "R" above the bottom of the pocket. USER FEED DIRECTION TOP VIEW END VIEW USER FEED DIRECTION COVER TAPE CARRIER TAPE REEL 1912 WWYY 1912 WWYY 1912 WWYY 0.30 ± 0.05 R0.20 MAX. 2.00 ± 0.05 SEE NOTE 3

4.00 SEE NOTE 1

Ø 1.5 +0.1//uniF6BB0.0 Ø 1.50 MIN. 8.00 1.75 ± 0.10 5.50 ± 0.05 SEE NOTE 3 A A 12.0 +0.3//uniF6BB0.1Bo Ao 0.12 0.12 R0.25 Ko SECTION A /uniF6BB A Ao = 3.20 Bo = 2.30 Ko = 1.30 (All dimensions in mm)

For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright © 2005-2014 Avago Technologies. All rights reserved. AV02-2218EN - June 17, 2014 Reel Dimensions - 13 Inch x 12mm PS 211211 8 7 20 3 PS PS CPN 12MM MPN Detail "X" RECYCLE LOGO SEE DETAIL "X" R19.0±0.5 Ø12.3±0.5(3x) Ø100.0±0.5 Ø329.0±1.0 11.9-15.4** 18.4 MAX.* SLOT 5.0±0.5(3x) 12.4 +2.0* -0.0 16.0mm HEIGHT x MIN. 0.4mm THICK. EMBOSSED LETTERING EMBOSSED LINE (2x) 89.0mm LENGTH LINES 147.0mm AWAY FROM CENTER POINT 7.5mm HEIGHT EMBOSSED LETTERING DATE CODE ESD LOGO Ø16.0 7.5mm HEIGHT EMBOSSED LETTERING HUB Ø100.0±0.5 Ø329.0±1.0 20.2(MIN.) 1.5(MIN.) Ø13.0 -0.2 +0.5 BACK VIEW FRONT VIEW 8 7 6 5