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| 19-0797; Rev 0; 4/07 KIT ATION EVALU BLE AVAILA GPS/GNSS Low-Noise Amplifier General Description Features o High-Power Gain: 20.5dB o Ultra-Low-Noise Figure: 0.8dB o Integrated 50 Output Matching Circuit o Low Supply Current: 4.1mA o Wide Supply Voltage Range: 1.6V to 3.3V o Low Bill of Materials o Small Footprint: 1.5mm x 1.0mm o Thin Profile: 0.75mm o Lead-Free and RoHS-Compliant Package MAX2659 The MAX2659 high-gain, low-noise amplifier (LNA) is designed for GPS, Galileo, and GLONASS applications. Designed in Maxim's advanced SiGe process, the device achieves a 20.5dB gain and an ultra-low-noise figure of 0.8dB while maximizing the input-referred 1dB compression point and the 3rd-order intercept point at 12dBm and -5dBm, respectively. The MAX2659 operates from a +1.6V to +3.3V single supply and consumes only 4.1mA. The shutdown feature in the device reduces the supply current to be less than 1A. The MAX2659 is available in a very small, lead-free, RoHS-compliant, 1.5mm x 1.0mm x 0.75mm, 6-pin DFN package. . Automotive Navigation Location-Enabled Mobile Devices Telematics (Asset Tracking and Management) Personal Navigation Device (PND) Cellular Phones with GPS Notebook PC/Ultra-Mobile PC Recreational, Marine Navigation Avionics Applications Ordering Information PART MAX2659ELT+ TEMP RANGE -40C to +85C PIN-PACKAGE 6 DFN PKG CODE L611-2 +Denotes a lead-free package. Pin Diagram/Functional Diagram/Typical Application Circuit + MAX2659 GND RFOUT RF OUTPUT 1 6 GND 2 5 SHDN VCC LOGIC CONTROL RF INPUT C1 RFIN 3 L1 BIAS 4 VCC C2 L1 = 6.8nH C1 = 470pF C2 = 33nF ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. GPS/GNSS Low-Noise Amplifier MAX2659 ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +4.2V Other Pins to GND....................-0.3V to + Operating VCC + 0.3V Maximum RF Input Power .............................................+10dBm Continuous Power Dissipation (TA = +70C) 6-Pin DFN (derates 2.1mW/C above +70C)............167mW CAUTION! ESD SENSITIVE DEVICE Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10s) .................................+260C Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (MAX2659 EV kit; VCC = 1.6V to 3.3V, TA = -40C to +85C, no RF signals are applied. Typical values are at VCC = 2.85V and TA = +25C, unless otherwise noted.) (Note 1) PARAMETER Supply Voltage Supply Current Digital Input-Logic High Digital Input-Logic Low Digital Input Current SHDN = high Shutdown mode, SHDN = low 1.4 0.4 1 CONDITIONS MIN 1.6 TYP 2.85 4.1 MAX 3.3 5.6 1 UNITS V mA A V V A AC ELECTRICAL CHARACTERISTICS (MAX2659 EV kit; VCC = 1.6V to 3.3V, TA = -40C to +85C, fRFIN = 1575.42MHz. Typical values are at VCC = 2.85V and TA = +25C, unless otherwise noted.) (Note 1) PARAMETER RF Frequency Power Gain Noise Figure 3rd-Order Input Intercept Point Input 1dB Compression point Input Return Loss Output Return Loss Reverse Isolation L1 band VCC = 2.85V VCC = 1.6V (Note 2) (Note 3) (Note 4) (Note 2) (Note 2) (Note 2) 10 10 17 16.5 CONDITIONS MIN TYP 1575.42 20.5 20.5 0.8 -5 -12 15 25 32 MAX UNITS MHz dB dB dBm dBm dB dB dB Note 1: Min and Max limits guaranteed by test at TA = +25C and guaranteed by design and characterization at TA = -40C and TA = +85C. Note 2: Guaranteed by design and characterization. Note 3: Measured with the two tones located at 5MHz and 10MHz offset from the center of the GPS band with -40dBm/tone. Note 4: Measured with a tone located at 5MHz offset from the center of the GPS band. 2 _______________________________________________________________________________________ GPS/GNSS Low-Noise Amplifier Typical Operating Characteristics (MAX2659 EV kit; Typical values are at VCC = 2.85V, TA = +25C, and fRFIN = 1575.42MHz, unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2659 toc01 MAX2659 GAIN vs. RF FREQUENCY MAX2659 toc02 GAIN vs. SUPPLY VOLTAGE MAX2659 toc03 4.5 +85C 4.3 SUPPLY CURRENT (mA) 25 20 15 GAIN (dB) 21.0 20.8 +25C 3.9 -40C 3.7 10 5 0 GAIN (dB) 500 750 1000 1250 1500 1750 2000 2250 2500 RF FREQUENCY (MHz) 4.1 20.6 20.4 20.2 -5 3.5 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 SUPPLY VOLTAGE (V) -10 20.0 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 SUPPLY VOLTAGE (V) NOISE FIGURE vs. TEMPERATURE MAX2659 toc04 NOISE FIGURE vs. SUPPLY VOLTAGE MAX2659 toc05 INPUT RETURN LOSS vs. RF FREQUENCY MAX2659 toc06 1.2 1.0 NOISE FIGURE (dB) 0.8 0.6 0.4 0.2 0 -40 -15 10 35 60 1.2 1.0 NOISE FIGURE (dB) 0.8 0.6 0.4 0.2 0 0 INPUT RETURN LOSS |S11| (dB) -5 -10 -15 -20 -25 -30 85 1.6 1.8 2.0 2.2 2.4 2.6 2.8 SUPPLY VOLTAGE (V) 3.0 3.2 3.4 500 750 1000 1250 1500 1750 2000 2250 2500 RF FREQUENCY (MHz) TEMPERATURE (C) OUTPUT RETURN LOSS vs. RF FREQUENCY MAX2659 toc07 REVERSE ISOLATION vs. RF FREQUENCY MAX2659 toc08 IIP3 vs. TEMPERATURE TWO TONES LOCATED AT 5MHz AND 10MHz OFFSET WITH -40dBm/TONE MAX2659 toc09 0 OUTPUT RETURN LOSS |S22| (dB) -5 -10 -15 -20 -25 -30 -35 -40 -45 -20 -30 -40 -3.5 -4.0 -4.5 IIP3 (dBm) -5.0 -5.5 -6.0 -6.5 REVERSE ISOLATION |S12| (dB) -50 -60 -70 -80 500 750 1000 1250 1500 1750 2000 2250 2500 RF FREQUENCY (MHz) 500 750 1000 1250 1500 1750 2000 2250 2500 RF FREQUENCY (MHz) -40 -15 10 35 60 85 TEMPERATURE (C) _______________________________________________________________________________________ 3 GPS/GNSS Low-Noise Amplifier MAX2659 Typical Operating Characteristics (continued) (MAX2659 EV kit; Typical values are at VCC = 2.85V, TA = +25C, and fRFIN = 1575.42MHz, unless otherwise noted.) INPUT P1dB COMPRESSION vs. TEMPERATURE MAX2659 toc10 MAX2659 toc11 IIP3 vs. SUPPLY VOLTAGE -3 TWO TONES LOCATED AT 5MHz AND 10MHz OFFSET WITH -40dBm/TONE -4 -9 -10 P1dB COMPRESSION (dBm) -11 -12 -13 -14 -15 1.6 1.8 2.0 2.2 2.4 2.6 2.8 SUPPLY VOLTAGE (V) 3.0 3.2 3.4 -40 IIP3 (dBm) -5 -6 -7 -8 -15 10 35 60 85 TEMPERATURE (C) INPUT P1dB COMPRESSION vs. SUPPLY VOLTAGE MAX2659 toc12 INPUT P1dB COMPRESSION vs. JAMMER FREQUENCY MAX2659 toc13 -8 -10 P1dB COMPRESSION (dBm) -12 -14 -16 -18 -20 0 -5 P1dB COMPRESSION (dBm) -10 -15 -20 -25 -30 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 SUPPLY VOLTAGE (V) 500 750 1000 1250 1500 1750 2000 2250 2500 JAMMER FREQUENCY (MHz) NF vs. JAMMER POWER AT 850MHz MAX2659 toc14 NF vs. JAMMER POWER AT 1850MHz MAX2659 toc15 3.5 3.0 2.5 NF (dB) 2.0 1.5 1.0 0.5 0 -30 -25 -20 -15 -10 3.5 3.0 2.5 NF (dB) 2.0 1.5 1.0 0.5 0 -5 -30 -25 -20 -15 -10 JAMMER POWER (dBm) JAMMER POWER (dBm) 4 _______________________________________________________________________________________ GPS/GNSS Low-Noise Amplifier Pin Description PIN 1, 2 3 4 5 6 NAME GND RFIN VCC SHDN RFOUT Ground. Connect to the PCB ground plane. RF Input. Requires a DC-blocking capacitor and external matching components. Supply Voltage. Bypass to ground with a 33nF capacitor as close as possible to the IC. Shutdown Input. A logic-low disables the device. RF Output. RFOUT is internally matched to 50 and incorporates an internal DC-blocking capacitor. FUNCTION MAX2659 Detailed Description The MAX2659 is an LNA designed for GPS L1, GALILEO, and GLONASS applications. The device features a power-shutdown control mode to eliminate the need for an external supply switch. The device achieves a 20.5dB gain and an ultra-low-noise figure of 0.8dB. The MAX2659 consumes approximately 4.1mA while providing a IP1dB of -12dBm and an IIP3 of -5dBm. Shutdown The MAX2659 includes a shutdown feature to turn off the entire chip. Apply a logic high to SHDN pin to place the part in the active mode and a logic low to place the part in the shutdown mode. Applications Information A properly designed PC board (PCB) is essential to any RF microwave circuit. Use controlled-impedance lines on all high-frequency inputs and outputs. Bypass VCC with decoupling capacitors located close to the device. For long VCC lines, it may be necessary to add decoupling capacitors. Locate these additional capacitors further away from the device package. Proper grounding of the GND pins is essential. If the PCB uses a topside RF ground, connect it directly to the GND pins. For a board where the ground is not on the component layer, connect the GND pins to the board with multiple vias close to the package. Input and Output Matching The MAX2659 requires an off-chip input matching. Only a 6.8nH inductor in series with a DC-blocking capacitor is needed to form the input matching circuit. The Typical Application Circuit diagram shows the recommended input-matching network. These values are optimized for the best simultaneous gain, noise figure, and return loss performance. Table 1 lists typical device S11 values. The MAX2659 integrates an on-chip output matching to 50 at the output, eliminating the need for external matching components. Chip Information PROCESS: SiGe BiCMOS Table 1. Typical S11 Values FREQUENCY (MHz) 1000 1100 1200 1300 1400 1500 1575 1600 1700 1800 1900 2000 REAL S11 -0.58 -0.68 -0.74 -0.74 -0.676 -0.56 -0.47 -0.44 -0.36 -0.3 -0.228 -0.14 IMAGINARY S11 -j0.52 -j0.356 -j0.16 j0.036 j0.22 j0.36 j0.415 j0.43 j0.467 j0.51 j0.567 j0.622 _______________________________________________________________________________________ 5 GPS/GNSS Low-Noise Amplifier MAX2659 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 6L UDFN.EPS PIN 1 0.075x45 TOPMARK 2 4 5 3 A 4 e 5 b 6 AA PIN 1 MARK 1 E L A2 D TOP VIEW A1 SIDE VIEW 3 2 A A 1 L1 L2 BOTTOM VIEW COMMON DIMENSIONS b A A1 A2 D E L L1 L2 b e Pkg. Code SECTION A-A MIN. 0.65 -0.00 1.45 0.95 0.30 0.00 0.05 0.17 NOM. 0.72 0.20 -1.50 1.00 0.35 --0.20 0.50 BSC. MAX. 0.80 -0.05 1.55 1.05 0.40 0.08 0.10 0.23 L611-1, L611-2 TITLE: PACKAGE OUTLINE, 6L uDFN, 1.5x1.0x0.8mm APPROVAL DOCUMENT CONTROL NO. REV. -DRAWING NOT TO SCALE- 21-0147 E 1 2 6 _______________________________________________________________________________________ GPS/GNSS Low-Noise Amplifier Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) MAX2659 TABLE 1 Translation Table for Calendar Year Code Calendar Year 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Legend: Marked with bar Blank space - no bar required TABLE 2 Translation Table for Payweek Binary Coding Payweek 06-11 12-17 18-23 24-29 30-35 36-41 42-47 48-51 52-05 Legend: Marked with bar Blank space - no bar required TITLE: PACKAGE OUTLINE, 6L uDFN, 1.5x1.0x0.8mm APPROVAL DOCUMENT CONTROL NO. REV. -DRAWING NOT TO SCALE- 21-0147 E 2 2 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. |
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