NJM2275 Under Development RF AMPLIFIER FOR VHF/UHF(LOW) BAND GENERAL DESCRIPTION PACKAGE OUTLINE 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. 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, 1kΩ load) VHF to UHF(Low) 26dB(OUT to IN, 400MHz) MTP6 PIN CONFIGULATION Orientation Mark 1 6 2 5 3 4 Pin Function 1. RF IN 2. GND 3. BIAS CAP 4. RF OUT 5. IREF 6. V+ Top View BLOCK DIAGRAM RF IN 1 GND 2 BIAS CAP 3 Ver.2004-08-25 V+ 6 I REF 5 RF OUT 4 -1- NJM2275 ABSOLUTE MAXIMUM RATINGS PARAMETER (Ta=25°C) SYMBOL RATINGS UNIT Supply Voltage V+ 10.0 V Power Dissipation Pd 200 mW Operating Temperature Topr - 40 to +85 °C Storage Temperature Tstg - 40 to +125 °C RECOMMENDED OPERATING CONDITION PARAMETER Supply Voltage SYMBOL TEST CONDITIONS V+ (Ta=25°C) MIN. TYP. MAX. UNIT 1.8 1.9 6.0 V MIN. TYP. MAX. UNIT - 0.8 1.0 mA - 15 - dB - 30 - dB - 2.2 - dB - -7 - dB - -7 - dB - 26 - dB - - 28 - dBm ELECTRICAL CHARACTERISTICS (Ta=25°C, V+=1.9V, fin=400MHz, unless otherwise noted) PARAMETER SYMBOL Current Consumption Icc Power Gain PG Voltage Gain VG Noise Figure NF Input Return Loss l S 11l 2 Output Return Loss l S 22l 2 RF OUT - RF IN Isolation Power Input at 1dB compression Point -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 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 SG (50Ω) V+ 1 6 2 5 Cv 1000p CL 2p Cb 1000p 3 4 Lout Cout 15n 8p Spectrum Analyzer (Zin=50Ω) Test Circuit 2 : VG , Output Level versus Input Level L in 27n C in 1000p SG (50Ω) V+ 1 6 2 5 Cv 1000p CL 2p Cb 1000p 3 4 Lout Cout 27n 4p RL 1kΩ Spectrum Analyzer (Zin=50Ω) Test Circuit 3 : Power Gain versus Input signal Frequency L in 27n C in 1000p V+ 1 6 2 5 Cv 1000p CL 2p Cb 1000p 3 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 Ω. The input impedance of spectrum analyzer Zin is 50Ω. 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 V+ C in L in 1000p 27n RFIN 1 6 2 5 Cv 1000p CL 2p Cb 1000p 3 4 Lout Cout 27n 4p RL 1kΩ RFOUT Evaluation PC Board V+ Lout CL 1608 CV 1608 1608 Cout RFIN 1608 1608 Cin Lin 1608 1608 RFOUT RL ① 1608 Cb Pin1 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=25°C, V+=2.0V, unless otherwise noted ) Power Gain/NF versus Input Signal Frequency 16 8 Test Circuit3 7 PG 12 6 10 5 8 4 6 NF(dB) 3 NF 4 2 2 1 0 0 300 350 400 450 Input Signal Frequency fin(MHz) 500 Pout/Icc versus Pin Pout / Icc versus Pin 7 0 10 6 Pout -10 5 -20 4 -30 3 -40 2 Icc -50 1 -60 0 -60 -50 -40 -30 -20 -10 0 Power Input Level Pin(dBm) 10 20 Power Output Level Pout(dBm) Test Circuit1(Power Gain) Current Consumption Icc(mA) Power Output Level Pout(dBm) 10 7 Test Circuit2(Voltage Gain) 0 6 -10 5 Pout -20 4 -30 3 -40 2 Icc -50 1 -60 0 -60 -50 -40 -30 -20 -10 0 Power Input Level Pin(dBm) 10 20 [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- Current Consumption Icc(mA) Power Gain PG(dB) 14