DC-to-Microwave, Low-Noise Amplifier

Transcription

1 19-9; Rev 2; /0 EVALUATION KIT AVAILABLE DC-to-Microwave, Low-Noise Amplifier General Description The is a low-voltage, low-noise amplifier for use from DC to microwave frequencies. Operating from a single +V supply, it has a 3dB bandwidth of 10MHz. The s low noise figure and high drive capability make it ideal for a variety of transmit, receive, and buffer applications. In a typical application, the only external components needed are input and output blocking capacitors and a V CC series resistor. To improve gain and output power, an RF choke can be added in series to the bias resistor. The comes in a -pin SOT13 package, requiring minimal board space. Features Single +V Supply Operation 3dB Bandwidth: DC to 10MHz High Gain: 18dB at 00MHz Low Noise Figure: 3.dB at 00MHz High Drive Capability: +3dBm at 16mA I D Ultra-Small SOT13 Package Applications Satellite Receivers TV Tuners Wireless Local Loops ISM Radios Global Positioning Systems Wireless Local-Area Networks Land Mobile Radios Set-Top Boxes Typical Operating Circuit Ordering Information PART TEMP RANGE PIN-PACKAGE EUS-T -0 C to +8 C SOT13- Pin Configuration V CC TOP VIEW C BYP (OPTIONAL) R BIAS L CHOKE (OPTIONAL) 1 C BLOCK 2 3 IN IN C BLOCK IN SOT13 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at

2 ABSOLUTE MAXIMUM RATINGS I D...0mA Input Power...+13dBm Continuous Power Dissipation (T A = +70 C) SOT13- (derate mw/ C above +70 C)...320mW Operating Temperature Range...-0 C to +8 C Junction Temperature...+ C Storage Temperature Range...-6 C to + C Lead Temperature (soldering, s) C 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. CAUTION! ESD SENSITIVE DEVICE ELECTRICAL CHARACTERISTICS (I D = 16mA, Z 0 = 0Ω, f IN = 00MHz, T A = +2 C, unless otherwise noted.) PARAMETER Operating Temperature Range Power Gain Gain Flatness 3dB Bandwidth CONDITIONS MIN TYP MAX (Note 1) -0 8 f IN = 0MHz 19.0 f IN = 00MHz f IN = 0MHz to 00MHz ± UNITS C db db MHz Input Voltage Standing-Wave Maximum Ratio Output Voltage Standing-Wave Maximum Ratio f IN = 0MHz to 0MHz f IN = 0MHz to 0MHz 1.9:1 1.6:1 Output 1dB Compression Point Noise Figure Output IP3 Group Delay Device Voltage Device Voltage Temperature Coefficient T A = T MIN to T MAX (Note 2) dbm db dbm ps V mv/ C Note 1: Parts are designed to operate over specified temperature range. Specifications are production tested and guaranteed at +2 C. Note 2: Guaranteed by design, not tested. 2

3 Typical Operating Characteristics (I D = 16mA, Z 0 = 0Ω, f IN = 00MHz, T A = +2 C, unless otherwise noted.) 2 20 GAIN vs. FREQUENCY T A = -0 C -01 :1 :1 VOLTAGE STANDING-WAVE RATIO vs. FREQUENCY -02 PUT 1dB COMPRESSION POINT vs. FREQUENCY T A = +8 C T A = +2 C -03 GAIN (db) 1 T A = +8 C VSWR 3:1 P-1 (dbm) 3 2 T A = -0 C 2:1 IN : NOISE FIGURE vs. FREQUENCY GHz GAIN vs. CURRENT -0 NOISE FIGURE (db) 3 T A = +8 C T A = +2 C T A = -0 C GAIN (db) 1 1.0GHz 2.0GHz 0.GHz I D (ma)

4 Pin Description PIN NAME 1 2, FUNCTION Amplifier Output. Use a series blocking capacitor with less than 3Ω reactance at your lowest operating frequency. Bias with an external resistor and an optional RF choke. Ground Connection. For optimum performance, provide a low-inductance connection to the ground plane. 3 IN Amplifier Input. Use a series blocking capacitor with less than 3Ω reactance at your lowest operating frequency. Table 1. Typical Scattering Parameters (I D = 16mA, Z 0 = 0Ω, T A = +2 C) FREQUENCY (GHz) S11 S11 S21 (db) S21 S21 S12 (db) S12 S12 S22 S22 K

5 Detailed Description The is a broadband amplifier with flat gain and 0Ω input and output ports. Its small size and simple bias circuitry make it ideal for applications where board space is limited. Applications Information External Components As shown in the Typical Operating Circuit, the is easy to use. Input and output series capacitors may be necessary to block DC bias voltages (generated by the ) from interacting with adjacent circuitry. These capacitors must be large enough to contribute negligible reactance in a 0Ω system at the minimum operating frequency. Use the following equation to calculate their minimum value: Grounding Proper grounding of the pins is essential. If the PC board uses a topside RF ground, the pins should be connected directly to it. For a board where the ground plane is not on the component side, the best technique is to connect the pins to it through multiple plated through-holes. PC Board Layout Example An example PC board layout is given in Figure 1. It uses FR- with 31mil layer thickness between the RF lines and the ground plane. This board satisfies all the above requirements. C BLOCK = 3,000 f (pf) where f (in MHz) is the minimum operating frequency. Bias current is supplied to the through an external resistor and optional RF choke connected between V CC and the pin. A bypass capacitor from V CC to may be necessary to isolate the V CC line from other circuitry. The resistor value determines the bias current from the following equation: I D = V CC - V D R BIAS where V D is the device voltage, nominally 3.8V. An optional RF choke can be added to improve the s gain and output power. The choke should be large enough to reduce the loading effect that the bias resistor has on the amplifier output. This is a function of R BIAS, frequency of operation, and output impedance. EXPANDED VIEW Figure 1. Example PC Board Layout

6 Tape-and-Reel Information.0 ± ± /-0.0 DIAMETER 2.0 ± ±0.1 A 3. ± ± ± RADIUS TYPICAL 0.30 ± ±0.0 Bo.0 ±0.1 Ko A0 Ao = 3.1mm ±0.1 Bo = 2.7mm ±0.1 Ko = 1.2mm ± MINIMUM A NOTE: DIMENSIONS ARE IN MM. AND FOLLOW EIA81-1 STANDARD. MARKING INFORMATION LOT SPECIFIC CODE X X X X DF = 0.30R MAX. ICs MAY ALSO BE MARKED WITH FULL PART NAME: 2611 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 SOT-13 L.EPS PACKAGE LINE, SOT-13, L E 1 1 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 9086 (08) Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.