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| 19-1135; Rev 0; 9/96 PC ATION EVALU ABLE AVAIL B DC-to-Microwave, +5V Low-Noise Amplifier ____________________________Features o Internally Biased o High Gain: 18.3dB at 900MHz o 3.9dB Noise Figure o Single +4.5V to +5.5V Operation o -1dBm Output 1dB Compression Power o Low-Cost Silicon Bipolar Design o Ultra-Small SOT143 Package _______________General Description The MAX2650 is a low-noise amplifier for use from DC to microwave frequencies. Operating from a single +5V supply, it has a flat gain response to 900MHz. The MAX2650's low noise figure and high drive capability make it ideal for a variety of transmit, receive, and buffer applications. The device is internally biased, eliminating the need for external bias resistors or inductors. In a typical application, the only external components needed are input and output blocking capacitors and a V CC bypass capacitor. The MAX2650 comes in a 4-pin SOT143 package, requiring minimal board space. MAX2650 ________________________Applications Wireless Local Loop Global Positioning Systems (GPS) ISM Radios Special Mobile Radios Wireless Local-Area Networks Cellular Base Stations Set-Top Boxes PART MAX2650EUS-T TEMP. RANGE -40C to +85C PIN-PACKAGE 4 SOT143 ______________Ordering Information __________Typical Operating Circuit __________________Pin Configuration TOP VIEW OUT CBLOCK OUT VCC CBYP VCC OUT 3 4 VCC MAX2650 GND IN IN CBLOCK GND 2 1 IN MAX2650 SOT143 ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 DC-to-Microwave, +5V Low-Noise Amplifier MAX2650 ABSOLUTE MAXIMUM RATINGS VCC to GND ..............................................................-0.3V to +8V Input Power ....................................................................+13dBm Continuous Power Dissipation (TA = +70C) SOT143-4 (derate 4mW/C above +70C)...................320mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C 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. ELECTRICAL CHARACTERISTICS (VCC = +5.0V, Z0 = 50, fIN = 900MHz, TA = +25C, unless otherwise noted.) PARAMETER Operating Temperature Range Power Gain Output 1dB Compression Point Output IP3 Noise Figure Maximum Input Voltage Standing-Wave Ratio Maximum Output Voltage Standing-Wave Ratio Group Delay Supply Voltage Supply Current TA = TMIN to TMAX VCC = 4.5V to 5.5V 4.5 15.5 13.0 11.0 17.7 17.7 17.7 fIN = 100MHz to 1000MHz fIN = 800MHz to 1000MHz (Note 1) CONDITIONS MIN -40 16.5 18.3 -1 10 3.9 1.5:1 1.3:1 300 5.5 20.0 22.0 24.0 mA ps V TYP MAX 85 21 UNITS C dB dBm dBm dB Note 1: Parts are designed to operate over specified temperature range. Specifications are production tested and guaranteed at +25C. 2 _______________________________________________________________________________________ DC-to-Microwave, +5V Low-Noise Amplifier __________________________________________Typical Operating Characteristics (VCC = 5.0V, Z0 = 50, fIN = 900MHz, TA = +25C, unless otherwise noted.) MAX2650 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2650-01 OUTPUT 1dB COMPRESSION POINT vs. FREQUENCY MAX2650-02 OUTPUT 1dB COMPRESSION POINT vs. FREQUENCY MAX2650-03 40 5 +5 3 30 ICC (mA) +85C P-1 (dBm) 1 +85C -1 -40C +25C 0 4.0 4.5 5.0 VCC (V) 5.5 6.0 -5 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 FREQUENCY (GHz) P-1 (dBm) +3 5.5V +1 5.0V 4.5V 20 -40C 10 +25C -1 -3 -3 -5 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 FREQUENCY (GHz) GAIN vs. FREQUENCY MAX2650-04 GAIN vs. FREQUENCY 5.5V 20 GAIN (dB) MAX2650-05 25 +85C 25 20 GAIN (dB) 15 +25C -40C 15 4.5V 10 5.0V 10 5 5 0 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 FREQUENCY (GHz) 0 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 FREQUENCY (GHz) NOISE FIGURE vs. FREQUENCY MAX2650-07 VOLTAGE STANDING-WAVE RATIO vs. FREQUENCY MAX2650-06 5 3.5:1 4 NOISE FIGURE (dB) +85C +25C -40C VSWR 3.0:1 3 2.5:1 2 2.0:1 OUT 1 1.5:1 IN 0 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 FREQUENCY (GHz) 1.0:1 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 FREQUENCY (GHz) _______________________________________________________________________________________ 3 DC-to-Microwave, +5V Low-Noise Amplifier MAX2650 ______________________________________________________________Pin Description PIN NAME IN FUNCTION Amplifier Input. Use a series blocking capacitor with less than 3 reactance at your lowest operating frequency. Ground Connection. For optimum performance, provide a low-inductance connection to the ground plane. Amplifier Output. Use a series blocking capacitor with less than 3 reactance at your lowest operating frequency. Supply Connection. Bypass directly at the package pin. The value of the bypass capacitor is determined by the lowest operating frequency and is typically the same as the blocking capacitor value. For long VCC lines, additional bypassing may be necessary. 1 2 GND 3 OUT 4 VCC Table 1. Typical Scattering Parameters (VCC = +5V, Z0 = 50, TA = +25C.) FREQUENCY (GHz) S11 (mag) S11 (ang) S21 (dB) S21 (mag) S21 (ang) S12 (dB) S12 (mag) S12 (ang) S22 (mag) S22 (ang) K 0.05 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.20 1.40 1.60 1.80 2.00 2.20 2.40 2.50 4 0.17 0.17 0.16 0.14 0.16 0.16 0.17 0.18 0.18 0.20 0.20 0.19 0.16 0.15 0.22 0.33 0.41 0.44 0.44 -3 -6 9 8 0 -7 -17 -26 -39 -54 -66 -86 -86 -66 -40 -36 -38 -37 -37 19.8 19.8 19.7 19.7 19.6 19.5 19.3 19.0 18.6 18.0 17.4 15.7 13.4 10.6 7.4 4.6 3.1 2.5 2.3 9.76 9.72 9.69 9.70 9.52 9.43 9.21 8.93 8.46 7.92 7.40 6.10 4.69 3.40 2.35 1.70 1.43 1.34 1.30 177 172 161 151 140 129 119 107 95 84 73 51 31 14 5 4 6 6 4 -37.8 -36.7 -35.8 -35.0 -33.8 -33.2 -32.3 -31.7 -31.1 -29.5 -28.7 -26.9 -25.5 -24.4 -24.4 -25.3 -26.5 -28.6 -29.5 0.013 0.015 0.016 0.018 0.020 0.022 0.024 0.026 0.028 0.033 0.037 0.045 0.053 0.060 0.060 0.055 0.047 0.037 0.034 8 14 23 28 32 34 37 41 44 48 50 52 51 44 32 22 21 22 22 0.42 0.39 0.37 0.35 0.32 0.28 0.25 0.21 0.17 0.13 0.10 0.05 0.12 0.24 0.35 0.43 0.46 0.49 0.49 -5 -6 -13 -19 -26 -34 -43 -53 -62 -71 -76 -49 -12 -17 -27 -33 -33 -29 -25 3.18 2.92 2.70 2.54 2.31 2.24 2.12 2.09 2.10 1.91 1.88 1.88 2.03 2.32 3.01 3.97 4.85 6.26 7.05 _______________________________________________________________________________________ DC-to-Microwave, +5V Low-Noise Amplifier _______________Detailed Description The MAX2650 is a broadband amplifier with flat gain and 50 input and output ports. Its small size and internal bias circuitry make it ideal for applications where board space is limited. PC Board Layout Example An example PC board layout is given in Figure 1. It uses FR-4 with 31mil layer thickness between the RF lines and the ground plane. The board satisfies all the above requirements. MAX2650 __________Applications Information External Components As shown in the Typical Operating Circuit, the MAX2650 is easy to use. Input and output series capacitors may be necessary to block DC bias voltages (generated by the MAX2650) from interacting with adjacent circuitry. These capacitors must be large enough to contribute negligible reactance in a 50 system at the minimum operating frequency. Use the following equation to calculate their minimum value: CBLOCK = 53,000 f MAX2650 RF IN RF OUT (pF) where f (in MHz) is the minimum operating frequency. The VCC pin must be RF bypassed for correct operation. To accomplish this, connect a capacitor between the VCC pin and ground, as close to the package as is practical. Use the same equation given above (for DC blocking capacitor values) to calculate the minimum capacitor value. If there are long VCC lines on the PC board, additional bypassing may be necessary. This may be done further away from the package, at your discretion. Proper grounding of the GND pin is essential. If the PC board uses a topside RF ground, the GND pin should connect directly to it. For a board where the ground plane is not on the component side, the best technique is to connect the GND pin to it through multiple plated through-holes. VCC EXPANDED VIEW Figure 1. Example PC Board Layout _______________________________________________________________________________________ 5 DC-to-Microwave, +5V Low-Noise Amplifier +5V Low-Noise Amplifier MAX2650 ________________________________________Tape-and-Reel/Marking Information 4.0 0.1 1.0 0.1 1.5 +0.1/-0.0 DIAMETER 2.0 0.05 1.75 0.1 A 3.5 0.05 2.2 0.1 8.0 0.3 0.5 RADIUS TYPICAL Bo 0.30 0.05 0.8 0.05 0.30R MAX. 4.0 0.1 A0 A 1.0 MINIMUM MARKING INFORMATION LOT SPECIFIC XX XX CODE DH = MAX2650 Ko Ao = 3.1mm 0.1 Bo = 2.7mm 0.1 Ko = 1.2mm 0.1 NOTE: DIMENSIONS ARE IN MM. AND FOLLOW EIA481-1 STANDARD. ICs MAY ALSO BE MARKED WITH FULL PART NAME: MAX2650 ________________________________________________________Package Information D DIM INCHES MIN MAX MILLIMETERS MAX MIN 0-8 A C A1 I e1 B A A1 B B1 C D E e e1 H I 0.031 0.001 0.014 0.030 0.0034 0.105 0.047 0.070 0.071 0.082 0.004 0.047 0.005 0.022 0.038 0.006 0.120 0.055 0.080 0.079 0.098 0.012 0.787 0.025 0.356 0.762 0.086 2.667 1.194 1.778 1.803 2.083 0.102 1.194 0.127 0.559 0.965 0.152 3.048 1.397 2.032 2.007 2.489 0.305 21-0052A E H 4-PIN SOT143 SMALL-OUTLINE TRANSISTOR PACKAGE B1 e 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. 6 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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