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| SMA428A High Gain, Low Noise Amplifier PRELIMINARY DATA * HIGH GAIN Gp = 21 dB at 1.85 GHz * LOW NOISE FIGURE NF = 1.3 dB at 1.85 GHz * LOW CURRENT CONSUMPTION 5.9 mA * OPEN COLLECTOR OUTPUT * TYPICAL SUPPLY VOLTAGE: 2.4-3 V * GAIN-STEP-MODE (36dB) * ULTRA MINIATURE SOT323-6L PACKAGE (LEAD FREE) APPLICATIONS * LNA FOR CELLULAR MARKET (ideal for GSM900, DCS1800 and PCS1900). * LNA FOR GPS APPLICATIONS DESCRIPTION High gain and low noise figures make the SMA428A an ideal solution for Low Noise Amplifiers and receiver front end stages up to 2.5 GHz. SMA428A's typical supply voltage range is 2.4 to 3.3 volts. It shows excellent performances in terms of NF, Gain and current consumption, using just 3 external matching components. Applying supply voltage to the GS pin and grounding Vcc pin, it provides a reduced gain step of 35 dB. SMA428A is housed in ultra miniature SOT323-6L package(LEAD FREE), the relative dimensions are 1.15mmx1.8mm with 0.8mm thickness. ABSOLUTE MAXIMUM RATINGS Symbol Vcc Vout VGS Itot Iin Ptot PIN Top Tstg Tj Device voltage Voltage at pin Out Voltage at pin GS Total Device Current Current into pin In Total dissipation, Ts < 125 oC Input Power Operating temperature Storage temperature Max. operating junction temperature Parameter Value 4 4 3.5 12 0.5 60 8 -40 to +85 -65 to +150 150 Unit V V V mA mA mW dBm oC oC oC SOT323-6L (SC70) ORDER CODE SMA428ATR BRANDING TBD BLOCK DIAGRAM Vcc, 1 GS, 4 In, 6 Out, 3 GND, 2;5 THERMAL RESISTANCE Rthjs March, 10 2003 Thermal Resistance Junction soldering point 200 oC/W 1/8 SMA428A Test Circuit (Fig. 1) Typical application circuit (Fig. 2) 47 pF VCTRL 180 pF Supply 3 k GS Vcc 6.8 nH 0.5 pF RF Out RF in 100 pF In Out SMA428A GND 2/8 SMA428A ELECTRICAL CHARACTERISTICS (Ta = +25oC, VCC = 2.7V, tested in circuit shown in fig.1, unless otherwise specified) Symbol f Itot Gp NF P-1dB IIP3 LGS ICTR Parameters Frequency Range Total device current Power Gain Noise Figure (Zs = 50 ) Input Power at 1 dB Gain Compression Input third order intercept point Insertion Loss in Gain-Step-Mode Current consumption in Gain-Step-Mode Vcc = 0.0 V, VCTRL = 2.7 V, RCTRL = 3 k Vcc = 0.0 V, VCTRL = 2.7 V, RCTRL = 3 k -23 -13 11 0.33 18 18 Test Conditions Min Typ 1850 5.9 21 1.3 1.7 7.5 Max Unit MHz mA dB dB dBm dBm dB mA PIN CONNECTION (Top View) 1 2 3 6 5 4 (Bottom View) 6 5 4 1 2 3 Pin No. 1 2 3 4 5 6 Pin Name VCC GND OUTPUT GS GND INPUT 3/8 SMA428A S-Parameters ( ZL = ZS = 50 , VCC = 2.7V, measured in application circuit shown in fig.2) 24 0 -1 23 T c = -40 C T c = 25 C -2 -3 22 T c = 25 C T c = 85 C -4 IRL (dB) T c = 8 5 C 20 Gp (dB) 21 -5 -6 -7 -8 T c = -40 C 19 -9 18 18 00 1 81 0 1 82 0 1 83 0 1 84 0 1 85 0 1 86 0 1 87 0 1 88 0 18 90 19 00 f (MHz ) -10 1 800 1810 1 820 183 0 1 840 1850 1 860 187 0 1 880 189 0 1 900 f (MHz ) -20 -22 -24 -26 -28 ISL (dB) -30 -32 -34 -36 -38 -40 180 0 18 10 1820 18 30 1840 185 0 1 860 1870 18 80 1890 190 0 f ((MHz ) T c = 25 C T c = -40 C 10 5 0 -5 -10 ORL (dB) -15 -20 T c = 85 C T c = -40 C Tc = 85 C T c = 25 C -25 -30 -35 -40 1 800 181 0 18 20 1 830 184 0 18 50 18 60 1 87 0 188 0 18 90 1 900 f (MHz ) 4/8 SMA428A TYPICAL PERFORMANCE Supply Current Vs Temperature 0 Control Current Vs Temperature 0.5 0.45 -5 0.4 0.35 0.3 -1 0 Ictrl (mA) Gp (dB) T c = 25 C -1 5 T c = 85 C -2 0 0.25 0.2 0.15 T c = -40 C -2 5 0.1 0.05 -3 0 18 00 18 10 18 20 183 0 1 84 0 1 85 0 1 86 0 18 70 18 80 18 90 190 0 f (MHz ) 0 -4 0 -25 25 T (C ) 50 85 OFF-Gain (Vcc = 0V, Vctrl = 2.7V, Rctrl = 3Kohm) -1 0 -1 2 -1 4 T c = 25 C -1 6 -1 8 Gp (dB) T c = 85 C -2 0 -2 2 T c = -40 C -2 4 -2 6 -2 8 -3 0 18 00 18 10 18 20 183 0 1 84 0 1 85 0 1 86 0 18 70 18 80 18 90 190 0 f (MHz ) 5/8 SMA428A TAPE & REEL DIMENSIONS mm MIN. A C D N T Ao Bo Ko Po P 3.8 (cumulative 10 Po) 2.25 2.7 1.2 4.0 4.0 4.2 (cumulative 10 Po) 178.5 12.8 20.2 54.5 55 55.5 14.4 TYP. 179 13.0 MAX 179.5 13.5 DEVICE ORIENTATION TOP VIEW END VIEW 428 428 428 428 6/8 SMA428A SOT323-6L MECHANICAL DATA mm Inch MAX 1.1 0.1 1 0.3 0.18 2.2 1.35 0.65 1.8 0.1 2.4 0.4 0.071 0.004 MIN. 0.031 0 0.0031 0.006 0.004 0.071 0.045 0.025 0.094 0.016 TYP. MAX 0.043 0.004 0.039 0.012 0.007 0.088 0.59 DIM. A A1 A2 b c D E e H Q MIN. 0.8 0 0.8 0.15 0.1 1.8 1.15 TYP. 7/8 SMA428A Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is registered trademark of STMicroelectronics (R) 2003 STMicroelectronics - All Rights Reserved All other names are the property of their respective owners. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 8/8 |
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