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| NJM2275 Under Development RF AMPLIFIER FOR VHF/UHF(LOW) BAND GENERAL DESCRIPTION The NJM2275 is a low current, low voltage RF amplifier, especially designed for VHF/UHF(low) band. The center frequency of this narrow band amplifier is changed by external components. PACKAGE OUTLINE NJM2275F FEATURES Wide Operating Voltage Low Operating Current High Gain Power Gain Voltage Gain Operating Frequency band High Isolation Bipolar Technology Package Outline 1.8V to 6V 0.8mA type. at V+ =1.9V, 400MHz input 15dB (1.9V, 400MHz input) 30dB (1.9V, 400MHz input, 1k load) VHF to UHF(Low) 26dB(OUT to IN, 400MHz) MTP6 PIN CONFIGULATION Orientation Mark 1 2 3 Top View 6 5 4 Pin Function 1. RF IN 2. GND 3. BIAS CAP 4. RF OUT 5. IREF 6. V+ BLOCK DIAGRAM RF IN 1 GND 2 BIAS CAP 3 V+ 6 I REF 5 RF OUT 4 Ver.2004-08-25 -1- NJM2275 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation Operating Temperature Storage Temperature SYMBOL V+ Pd Topr Tstg RATINGS 10.0 200 - 40 to +85 - 40 to +125 (Ta=25C) UNIT V mW C C (Ta=25C) MIN. 1.8 TYP. 1.9 MAX. 6.0 UNIT V RECOMMENDED OPERATING CONDITION PARAMETER Supply Voltage SYMBOL V+ TEST CONDITIONS ELECTRICAL CHARACTERISTICS (Ta=25C, V+=1.9V, fin=400MHz, unless otherwise noted) PARAMETER Current Consumption Power Gain Voltage Gain Noise Figure Input Return Loss Output Return Loss RF OUT - RF IN Isolation Power Input at 1dB compression Point SYMBOL Icc PG VG NF l S 11l 2 l S 22l 2 I SL P-1dB TEST CONDITIONS No signal Pin= - 40dBm Test circuit1 Pin= - 40dBm Test circuit2 Test Circuit1 Pin= - 40dBm Test Circuit1 Pin= - 40dBm Test Circuit1 Pin= - 40dBm Test Circuit1 Test Circuit1 MIN. TYP. 0.8 15 30 2.2 -7 -7 26 - 28 MAX. 1.0 UNIT mA dB dB dB dB dB dB dBm -2- Ver.2004-08-25 NJM2275 TEST CIRCUIT This test circuit allows the measurement of all parameters described in "ELECTRICAL CHARACTERISTICS". Test Circuit 1 : PG , lS11l2 , lS22l2 , P-1dB , Output Level versus Input Level L in 27n C in 1000p 1 SG (50) Cb 1000p 3 4 Lout Cout 15n 8p 6 V+ Cv 1000p 2 5 CL 2p Spectrum Analyzer (Zin=50) Test Circuit 2 : VG , Output Level versus Input Level L in 27n C in 1000p 1 SG (50) Cb 1000p 3 4 Lout Cout 27n 4p 6 V+ Cv 1000p 2 5 CL 2p RL 1k Spectrum Analyzer (Zin=50) Test Circuit 3 : Power Gain versus Input signal Frequency L in 27n C in 1000p 1 6 V+ Cv 1000p 2 Cb 1000p 3 5 CL 2p 4 Lout Cout 15n 8p NF meter PG and PG shown in "Output level versus Input Level" are given by , PG = Pout - Pin VG = (Pout + Prl ) - Pin Prl is caused by the voltage drop of RL. RL is 1000 . The input impedance of spectrum analyzer Zin is 50. Prl is calculated from Prl = 20log ( ( RL + Zin) / RL) Prl = 20 log (1050 / 50 ) Ver.2004-08-25 -3- NJM2275 EVALUATION PC BOARD The evaluation board is useful for your design and to have more understanding of the usage and performance of this device. This circuit is the same as TEST CIRCUIT. Note that this board is not prepared to show the recommendation of pattern and parts layout. Circuit Diagram C in L in 1000p 27n RFIN 1 6 V+ Cv 1000p 2 Cb 1000p 3 5 CL 2p 4 Lout Cout 27n 4p RL 1k RFOUT Evaluation PC Board V+ Lout CV 1608 1608 Cout RFIN 1608 1608 1608 CL 1608 1608 RFOUT RL Cb Cin Lin Pin1 1608 This evaluation board is designed to have the maximum value of VG at 400MHz. By using the value of Test Circuit1, this board can be changed to have the maximum value of PG at 400MHz. If NF is not so good, Pin 5 may have a noisy signal. In such cases, it may be effective to connect a capacitor between Pin 5 and ground. However, if the ground has a large noisy signal, NF may become worse. -4- Ver.2004-08-25 NJM2275 TYPICAL CHARACTERISTICS ( Ta=25C, V+=2.0V, unless otherwise noted ) Power Gain/NF versus Input Signal Frequency 16 14 Test Circuit3 PG 8 7 6 5 4 NF 3 2 1 0 300 350 400 450 Input Signal Frequency fin(MHz) 500 Power Gain PG(dB) 12 10 8 6 4 2 0 Pout/Icc versus Pin 10 0 Pout -10 -20 -30 -40 Icc -50 -60 -60 -50 -40 -30 -20 -10 0 Power Input Level Pin(dBm) 10 20 1 0 5 4 3 2 Test Circuit1(Power Gain) 7 6 Current Consumption Icc(mA) 10 0 -10 -20 -30 -40 -50 -60 -60 -50 NF(dB) Pout / Icc versus Pin Test Circuit2(Voltage Gain) 7 6 5 Pout 4 3 2 Icc 1 0 -40 -30 -20 -10 0 Power Input Level Pin(dBm) 10 20 Current Consumption Icc(mA) Power Output Level Pout(dBm) Power Output Level Pout(dBm) [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver.2004-08-25 -5- |
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