NJM2275 VHF/UHF BAND RF AMPLIFIER

Transcription

1 NJM7 VHF/UHF BAND RF AMPLIFIER GENERAL DESCRIPTION PACKAGE OUTLINE The NJM7 is a low current, low voltage RF amplifier, especially designed for VHF/UHF band. The center frequency of this narrow band amplifier is changed by external components. FEATURES Wide Operating Voltage.8V to V Low Operating Current.8mA V + =.9V, no signal input High Gain Power Gain MHz input Voltage Gain MHz input, kω load Operating Frequency band Up to 8MHz High Isolation (OUT to IN) MHz Bipolar Technology Package Outline SOT--- NJM7F PIN CONFIGULATION Orientation Mark Pin Function... BIAS CAP.. IREF. Top View Simplified Block Diagram BIAS CAP BIAS CAP Ver

2 NJM7 ABSOLUTE MAXIMUM RATINGS (Ta= C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V +. V Power Dissipation P D mw RF Input Level Pinmax dbm Operating Temperature T o p r - to + 8 C Storage Temperature T s t g - to + C RECOMMENDED OPERATING CONDITIONS (Ta= C) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Supply Voltage V V ELECTRICAL CHARACTERISTICS (Ta= C, V + =.9V, fin=mhz, unless otherwise noted) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Operating Current I c c No signal -.8. ma Power Gain Voltage Gain PG VG Pin= - dbm Test circuit Pin= - dbm Test circuit - - db - - db Noise Figure NF Test Circuit -. - db Input Return Loss Output Return Loss - Isolation l S l l S l I S L Pin= - dbm Test Circuit Pin= - dbm Test Circuit Pin= - dbm Test Circuit db db - - db Power Input at db compression Point P db Test Circuit dbm Ver

3 NJM7 TEST CIRCUIT These test circuits allow the measurement of all parameters described in ELECTRICAL CHARACTERISTICS. Test Circuit for Icc, PG, P d B and Pin vs. Pout L in 7n SG (Ω) C in Cb BIAS CAP n 8p CL p RL Ω Spectrum Analyzer (Zin=Ω) Test Circuit for VG L in 7n SG (Ω) C in Cb BIAS CAP 7n p CL RL kω Spectrum Analyzer (Zin=Ω) PG and VG has the following relation. PG = Pout Pin VG = (Pout + Prl ) Pin where Pin = input level in dbm Pout = output level in dbm Prl = the loss caused by the voltage drop of RL. RL is Ω. The input impedance of spectrum analyzer Zin is Ω. Prl is calculated from Prl = log ( ( RL + Zin) / RL) Prl = log ( / ) Ver

4 NJM7 Test Circuit for NF L in 7n C in Cb BIAS CAP n CL p 8p NF meter Test Circuit for l S l and l S l L in 7n C in Cb BIAS CAP n CL p 8p Netw ork Analyzer Test Circuit for S-Parameters (this item is not specified in ELECTRICAL CHARACTERISTICS ) Cb Cb.u BIAS CAP.u.u Netw ork Analyzer Port HP87D Port Ver

5 NJM7 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 7n Cb BIAS CAP n 8p CL p RL Ω Evaluation PC Board V + RFIN Cin 8 Lin Cb Cl Rl RFOUT Pin This evaluation board is designed to have the maximum value of PG at MHz. By using the value of Test Circuit, this board can have the maximum value of VG at MHz. is effective to obtain good NF. However, if the ground has a large noisy signal, NF may become worse. Ver

6 NJM7 TERMINAL FUNCTION (Ta= C, V + =.9 V) Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION k.9v k BIAS CAP.V RF Input Ground Bias Capacitance An external decoupling capacitor is placed between this pin and ground. k RF Output 7 IREF.7V Reference of Current Source An external decoupling capacitor is placed between this pin and ground. An external resistor from this pin to ground can controls the reference current of current source and the related performances, such as NF and gain. Supply Voltage ESD protection transistor exists between and ground. -- Ver

7 NJM7 TYPICAL CHARACTERISTICS ( Ta= C, V + =.9V, unless otherwise noted ) Operating Current Icc versus Supply Voltage Power Gain PG versus Supply Voltage.. No signal C 8 C Test circuit Icc(mA).8. C - C PG(dB) - C C 8 C C.. 7 (V) 7 (V) P-dB(dBm) Test circuit Pin at db Compression Point P-dB versus Supply Voltage C 8 C C - C VG(dB) Voltage Gain VG versus Supply Voltage Test circuit - C C 8 C C (V) 7 (V). Noise Figure NF versus Supply Voltage Test circuit Test circuit - Isolation ISL versus Supply Voltage. C C NF(dB)... C 8 C C - C ISL(dB) 8 C - C. 7 (V) 7 (V) Ver

8 NJM7.. No signal Operating Current Icc versus Ambient Temperature Ta Power Gain PG versus Ambient Temperature Ta Test circuit Icc(mA).8. V V.9V.8V PG(dB) V.9V..8V Test circuit Pin at db Compression Point P-dB versus Ambient Temperature Ta Test circuit Voltage Gain VG versus Ambient Temperature Ta P-dB(dBm) V,.9V,V VG(dB) V.9V.8V Noise Figure NF versus Ambient Temperature Ta Test circuit Test circuit - Isolation ISL versus Ambient Tempeature Ta..8V,.9V V V NF (db)... V, V ISL(dB).8V.9V Ver

9 NJM7 Pout(dBm) Output Power Pout/Operating Current Icc versus Input Power Pin =.9V fin=mhz Pin(dBm) Pout Icc 8 Icc(mA) PG (db) 8 8 Power Gain PG/Noise Figure NF versus Frequency fin PG NF 8 9 fin (MHz) NF (db) Test circuit Input Return Loss S versus Supply Voltage - Output Return Loss S versus Supply Voltage Test circuit S (db) - - C 8 C C - C S (db) C C C - 7 (V) - 8 C 7 (V) Test circuit Input Return Loss S versus Ambient Temperature - Test circuit Output Return Loss S versus Ambient Temperature V, V S (db) - -.8V,.9V S (db) - -.8V.9V V V Ver

10 NJM7 S Paramater (reference) Input Reflection Coefficient S versus Frequency Test circuit Output Reflection Coefficient S versus Frequency Test circuit - - S (db) - - S (db) Frequency (MHz) - 8 Frequency (MHz) S (db) Forward Transmission Coefficient S versus Frequency Test circuit 8 Frequency (MHz) S (db) 8 Reverse Transmission Coefficient S versus Frequency Test circuit 8 Frequency (MHz) MHz S S S S mag(units) ang(deg) mag(units) ang(deg) mag(units) ang(deg) mag(units) ang(deg) Ver

11 NJM7 S +j Test circuit S +j Test circuit +j +j +j +j MHz 8MHz 7MHz MHz MHz MHz -j -j -j MHz MHz MHz -j -j -j MHz MHz MHz MHz MHz MHz 7MHz 8MHz MHz [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