MGA-72543-TR2G

MGA-72543 PHEMT* Low Noise Amplifier with Bypass Switch Data Sheet Description Features Avago’s MGA-72543 is an economical, easy-to-use GaAs MMIC Low Noise Amplifier (LNA),which is designed for an adaptive CDMA receiver LNA and adaptive CDMA transmit driver amplifier. The MGA-72543 features a minimum noise figure of 1.4 dB and 14 dB associated gain from a single stage, feedback FET amplifier. The output is internally matched to 50Ω. The input is optimally internally matched for lowest noise figure into 50Ω. The input may be additionally externally matched for low VSWR through the addition of a single series inductor. When set into the bypass mode,both input and output are internally matched to 50Ω. The MGA-72543 offers an integrated solution of LNA with adjustable IIP3. The IIP3 can be fixed to a desired current level for the receiver’s linearity requirements. The LNA has a bypass switch function,which sets the current to zero and provides low insertion loss. The bypass mode also boosts dynamic range when high level signal is being received. x Lead-free Option Available x Operating Frequency: 0.1 GHz ~ 6.0 GHz x Noise Figure: 1.4 dB at 2 GHz x Gain: 14 dB at 2 GHz x Bypass Switch on Chip Loss = -2.5 dB (Id 1 and B1 > 0) over its full frequency range, other possibilities exist that may cause an amplifier circuit to oscillate. One condition to check for is feedback in the bias circuit. It is important to capacitively bypass the connections to active bias circuits to ensure stable operation. In multistage circuits, feedback through bias lines can also lead to oscillation. Components of insufficient quality for the frequency range of the amplifier can sometimes lead to instability. Also, component values that are chosen to be much higher in value than is appropriate for the application can present a problem. In both of these cases, the components may have reactive parasitics that make their impedances very different than expected. Chip capacitors may have excessive inductance, or chip inductors can exhibit resonances at unexpected frequencies. • A Note on Supply Line Bypassing Multiple bypass capacitors are normally used throughout the power distribution within a wireless system. Consideration should be given to potential resonances formed by the combination of these capacitors and the inductance of the DC distribution lines. The addition of a small value resistor in the bias supply line between bypass capacitors will often de-Q the bias circuit and eliminate resonance effects. Statistical Parameters Several categories of parameters appear within the electrical specification portion of the MGA-72543 data sheet. Parameters may be described with values that are either “minimum or maximum,” “typical,” or “standard deviations.” The values for parameters are based on comprehensive product characterization data, in which automated measurements are made on a statistically significant number of parts taken from nonconsecutive process lots of semiconductor wafers. The data derived from product characterization tends to be normally distributed, e.g., fits the standard bell curve. Parameters considered to be the most important to system performance are bounded by minimum or maximum values. For the MGA-72543, these parameters are: Vc test, NFtest, Ga test, IIP3 test, and IL test. Each of the guaranteed parameters is 100% tested as part of the normal manufacturing and test process. Values for most of the parameters in the table of Electrical Specifications that are described by typical data are the mathematical mean (μ ), of the normal distribution taken from the characterization data. For parameters where 19 measurements or mathematical averaging may not be practical, such as S-parameters or Noise Parameters and the performance curves, the data represents a nominal part taken from the center of the characterization distribution. Typical values are intended to be used as a basis for electrical design. To assist designers in optimizing not only the immediate amplifier circuit using the MGA-72543, but to also evaluate and optimize trade-offs that affect a complete wireless system, the standard deviation (V) is provided for many of the Electrical Specification parameters (at 25°C). The standard deviation is a measure of the variability about the mean. It will be recalled that a normal distribution is completely described by the mean and standard deviation. Standard statistics tables or calculations provide the probability of a parameter falling between any two values, usually symmetrically located about the mean. Referring to Figure 15 for example, the probability of a parameter being between ±1V is 68.3%; between ±2V is 95.4%; and between ±3V is 99.7%. 68% 95% 99% -3σ -2σ -1σ Mean () +1σ (typical) +2σ +3σ Parameter Value Figure 15. Normal Distribution Curve. Phase Reference Planes The positions of the reference planes used to specify Sparameters and Noise Parameters for the MGA-72543 are shown in Figure 16. As seen in the illustration, the reference planes are located at the point where the package leads contact the test circuit. REFERENCE PLANES TEST CIRCUIT Figure 16. Phase Reference Planes. Part Number Ordering Information Part Number No. of Devices Container MGA-72543-TR1G MGA-72543-TR2G MGA-72543-BLKG 3000 10000 100 7” Reel 13” Reel antistatic bag Note: For lead-free option, the part number will have the character “G” at the end. Package Dimensions SC-70 4L/SOT-343 1.30 (.051) BSC HE E 1.15 (.045) BSC b1 D A2 A A1 b L C DIMENSIONS (mm) SYMBOL E D HE A A2 A1 b b1 c L 20 MIN. 1.15 1.85 1.80 0.80 0.80 0.00 0.25 0.55 0.10 0.10 MAX. 1.35 2.25 2.40 1.10 1.00 0.10 0.40 0.70 0.20 0.46 NOTES: 1. All dimensions are in mm. 2. Dimensions are inclusive of plating. 3. Dimensions are exclusive of mold flash & metal burr. 4. All specifications comply to EIAJ SC70. 5. Die is facing up for mold and facing down for trim/form, ie: reverse trim/form. 6. Package surface to be mirror finish. Device Orientation REEL TOP VIEW END VIEW 4 mm CARRIER TAPE 8 mm USER FEED DIRECTION 72x 72x 72x 72x COVER TAPE Tape Dimensions For Outline 4T P P2 D P0 E F W C D1 t1 (CARRIER TAPE THICKNESS) Tt (COVER TAPE THICKNESS) K0 10 MAX. A0 DESCRIPTION 10 MAX. B0 SYMBOL SIZE (mm) SIZE (INCHES) CAVITY LENGTH WIDTH DEPTH PITCH BOTTOM HOLE DIAMETER A0 B0 K0 P D1 2.40 0.10 2.40 0.10 1.20 0.10 4.00 0.10 1.00 + 0.25 0.094 0.004 0.094 0.004 0.047 0.004 0.157 0.004 0.039 + 0.010 PERFORATION DIAMETER PITCH POSITION D P0 E 1.55 0.10 4.00 0.10 1.75 0.10 0.061 + 0.002 0.157 0.004 0.069 0.004 CARRIER TAPE WIDTH THICKNESS W t1 8.00 + 0.30 - 0.10 0.254 0.02 0.315 + 0.012 0.0100 0.0008 COVER TAPE WIDTH TAPE THICKNESS C Tt 5.40 0.10 0.062 0.001 0.205 + 0.004 0.0025 0.0004 DISTANCE CAVITY TO PERFORATION (WIDTH DIRECTION) F 3.50 0.05 0.138 0.002 CAVITY TO PERFORATION (LENGTH DIRECTION) P2 2.00 0.05 0.079 0.002 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 © 2005-2010 Avago Technologies. All rights reserved. Obsoletes 5989-4189EN AV02-1296EN - October 28, 2010