NJM2594 DOUBLE BALANCED MODULATION / DEMODULATION ! GENERAL DESCRIPTION The NJM2594 is a double balanced modulation/demodulation circuit, applied to suppressed carrier modulation, amplitude modulation, synchronous detection, FM or PM detection circuit. Single input voltage and simplification of external circuit offers wider applications. ! PACKAGE OUTLINE NJM2594M ! FEATURES " Operating Voltage " Excellent Carrier Suppression " Simplification of External Circuit " Bipolar Technology " Package Outline 4.5 to 9V NJM2594V DMP8, SSOP8 ! BLOCK DIAGRAM NC CARRIER SIGNAL INPUT BYPASS INPUT 8 7 6 5 1 2 3 4 V+ OUTPUT1 OUTPUT2 GND BLOCK DIAGRAM -1- NJM2594 ! ABSOLUTE MAXIMUM RATINGS PARAMETER (Ta=25°C) SYMBOL RATINGS UNIT Supply Voltage V+ 14.0 V Power Dissipation PD 250(SSOP-8), 300(DMP-8) mW Operating Temperature Topr - 40 to +85 °C Storage Temperature Tstg - 40 to +125 °C Id 10 mA Output 2 Drive Current ! RECOMMENDED OPERATIONAL CONDITION PARAMETER SYMBOL TEST CONDITIONS V+ Supply Voltage ! (Ta=25°C) MIN. TYP. MAX. UNIT 4.5 5.0 9.0 V (Ta=25°C,V+=5.0V) ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Current Consumption TEST CONDITIONS Icc No Signal MIN. TYP. MAX. UNIT - 11 14 mA Conversion Gain note(3) Gc note(1) - 2.0 0 + 2.0 dB Signal Leakage Level note(4) Ls note(1) - -35 -20 dB Carrier Leakage Level note(5) Lc note(1) - -40 -20 dB Intermodulation note(6) IMD note (2) - - 60 - dB - 600 - Ω - 3.8 - pF - 1200 - Ω Signal Input Resistance Rs Signal Input Capacitance Cs Carrier Input Resistance Rc Carrier Input Capacitance Cc note (7) - 2.2 - pF Output Resistance Ro OUTPUT1 terminal - 350 - Ω Output Capacitance Co OUTPUT1 terminal - 2.6 - pF note (7) note (7) Notes : (1) Input signal : Fs=1.75MHz, 70mVrms(-10dBm) Carrier signal : Fc=28.25MHz,100mVrms(-7dBm) Desired output signal : fundamental carrier upper-sideband output, Fd=30MHz (2) Input signal 1 : Fs1=1.75MHz, 42.5mVrms(-14.42dBm) Input signal 2 : Fs2=2.00MHz, 42.5mVrms(-14.42dBm) Carrier signal : Fc=28.25MHz,100mVrms(-7dBm) (3) The ratio of desired output signal level to input signal level (4) The ratio of output signal at input signal frequency to desired output signal (5) The ratio of output signal at carrier signal frequency to desired output signal (6) The ratio of 29.75MHz Intermodulation signal to desired output signal (7) Measured at 10MHz -2- NJM2594 ! MEASUREMENT CIRCUIT " Emitter - follower Output Items for measurement : Conversion Gain, Signal Leakage Level, Carrier Leakage Level, Intermodulation Measured at OUTPUT2 (pin 3) Signal Input Fs 0.01uF 5 4 6 3 7 2 Open (1) 50Ω Carrier Input Fc 0.01uF 0.01uF (1) 50Ω 0.01uF 8 Spectrum Analyzer (Rin=50Ω) 510Ω V+ 1 0.022uF TEST CIRCUIT 1 " Collector Output Items for measurement : Current Consumption Measured at OUTPUT1 (pin2) Signal Input Fs 0.01uF 5 4 6 3 7 2 (1) 50Ω Carrier Input Fc 0.01uF 330Ω 0.01uF (1) 50Ω Open 4.3kΩ 47Ω 0.01uF 8 1 A Spectrum Analyzer (Rin=50Ω) V+ 0.022uF TEST CIRCUIT 2 Notes : (1)Impedance-matching resistor -3- NJM2594 ! (Ta=25°C,V+=5.0V) TERMINAL FUNCTION Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION Power Supply. 1 1 V+ 5V Collector Output. 2 OUTPUT1 V+＋ 4.0V 2 3 3 OUTPUT2 3.3V Emitter Output. Since there is no internal resistor to the ground, emitter current may be obtained by connecting an external resistor. This terminal voltage is obtained with a 510Ω external resistor. Ground. 4 GND -- Signal Input Terminal. 5 6 SIGNAL INPUT V+ BYPASS 2.2V 2.2V Common base lead of two differential circuits. This terminal should be connected externally to AC ground. Carrier Input Terminal. 7 8 -4- CARRIER INPUT NC 5 6 7 2.2V -- No Connect. The NC terminal is not connected to internal circuit so that this terminal can be open or grounded. NJM2594 ! APPLICATION CIRCUIT " Emitter - follower output Signal Input Fs V+ Cs Cb Carrier Input Fc Rc= 350Ω 5 4 0.01uF 6 3 7 2 Open 8 1 Ii Cc Ground or Open RL RL~ Emitterfollower Output + V -1.7 Ii V+ 0.022uF APPLICATION CIRCUIT 1 " Collector output Signal Input Fs Cs 5 Cb Carrier Input Fc 4 V+ 6 Rc= 350Ω Open 7 2 Collector Output 8 1 V+ Cc Ground or Open 3 0.01uF 0.022uF APPLICATION CIRCUIT 2 " " " The impedance of AC coupling capacitor connected to input / output terminals should be adequately low at the frequency of input / output signals, respectably. The impedance of base-coupling capacitor connected to BYPASS terminal should be adequately low against the both of input/output signals to keep better performance on leakage and distortion characteristics. In case of APPLICATION CIRCUIT 1, idle (emitter) current may be supplied by adding an external resistor between OUTPUT2 (pin3) and ground. The relation of idle current Ii and external resistance RL is determined by : RL~ ! " + V -1.7 Ii Note that there is some degradation in intermodulation characteristics with increasing the external resistance RL, or decreasing a load impedance of Emitter-follower output. The level of output signal comes constant at carrier input signal level over 100mV ( see Typical Characteristics). -5- NJM2594 ! HOW TO DECREASE LEAKAGE LEVEL By adjusting DC bias of SIGNAL INPUT terminal, carrier leakage level may be decreased. By adjusting DC bias of CARRIER INPUT terminal, signal leakage level may be decreased. In actual circuit, it can be seen the case that either of these adjustment is provided, not both. Singal Input Fs Carrier Input Fc 5 4 6 3 7 2 220kΩ 220kΩ 8 1 V+ 10kΩ 10kΩ Variable Resistor for Carrier Leakage Level Adjustment Variable Resistor for Signal Leakage Level Adjustment LEAKAGE ADJUSTMENT CIRCUIT ! EVALUATION PC BOARD The evaluation PC board shown in next page is useful for your design and is intended to have more understanding of the usage and performance of this device. Two kinds of board are prepared for two packages, SSOP and DMP, respectively. Each board can be applied to two kinds of circuit, emitter-follower output type and collector output type, as shown below. This circuit is the same as MEASUREMENT CIRCUIT. For other electrical conditions, it should be necessary to reconsider each value of components, especially of capacitance. Note that this board is not prepared to show the recommendation of pattern and parts layout. ● Emitter - follower output Signal Input Fs (3) 0.01uF 5 Carrier Input Fc ● Collector output Signal Input Fs (5) 0.01uF (2) 50Ω -6- 7 (4) 0.01uF 3 Output 2 Open 8 1 5 4 6 3 7 (4) 0.01uF 2 8 1 (3) 0.01uF (1) 50Ω Carrier Input Fc 6 (5) 0.01uF (2) 50Ω 4 (8) 0.01uF (1) 50Ω RL (7) V+ (6) 0.022uF Open (9) (10) 0.01uF 330Ω (12) 4.3kΩ (11) Output (50Ω) A V+ 47Ω (6) 0.022uF NJM2594 Evaluation PC Board Component Placement View ● Emitter - follower output SIGNAL INPUT （裏面） OUTPUT2 （裏面） RL 4 50Ω 2 7 NJM2594 50Ω 1 0.01uF 3 0.01uF 5 0.01uF 0.01uF 8 6 0.022uF CARRIER INPUT （裏面） GND Collector output SIGNAL INPUT （裏面） 50Ω 1 0.01uF 3 0.01uF NJM2594 ● VCC（裏面） 4 50Ω 2 5 0.01uF 0.01uF 9 330Ω 10 4.3Ω 12 11 47Ω 6 0.022uF CARRIER INPUT （裏面） GND OUTPUT1 （裏面） VCC（裏面） -7- NJM2594 ! TYPICAL CHARACTERISTICS ( Ta=25°C,V+=5.0V, unless otherwise noted ) Operating Current versus Supply Voltage (TEST CIRCUIT2, No input signal) 14.0 (TEST CIRCUIT2, No input signal) 14.0 12.0 2pin Output Voltage (V) Operating Current Icc (mA) 2pin Output Voltage versus Supply Voltage 10.0 8.0 6.0 4.0 2.0 0.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0 1 2 3 4 Supply Voltage V+ (V) 3pin Output Voltage versus Supply Voltage 5/6/7 pin Output Voltage 3pin Output Voltage (V) 10.0 8.0 6.0 4.0 2.0 0.0 9 10 11 12 13 14 2.5 2.0 1.5 1.0 0.5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0 1 2 3 4 Supply Voltage V+ (V) Intermodulation IMD (dB) 2 1 0 -1 -2 -3 4 5 6 7 8 9 10 11 12 13 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 14 4 Carrier Leakage Level Lc (dB) 6 7 8 9 10 9 10 11 12 13 14 5 6 7 8 9 10 11 12 13 14 Carrier Leakage Level versus Supply Voltage (TEST CIRCUIT1, Fs=1.75MHz/-10dBm, Fc=28.25MHz/-7dBm) 5 8 Supply Voltage V+ (V) Signal Leakage Level versus Supply Voltage 4 7 (TEST CIRCUIT1, Fs1=1.75MHz/-14.42dBm,Fs2=2MHz/14.42dBm, Fc=28.25MHz/-7dBm) Supply Voltage V+ (V) 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 6 Intermodulation versus Supply Voltage (TEST CIRCUIT2, Fs=1.75MHz/-10dBm, Fc=28.25MHz/-7dBm) 3 5 Supply Voltage V+ (V) Conversion Gain versus Supply Voltage Conversion Gain Gc (dB) 8 0.0 0 Signal Leakage Level Ls (dB) 7 (TEST CIRCUIT2, No input signal) 3.0 12.0 11 Supply Voltage V+ (V) -8- 6 5/6/7 pin Output Voltage versus Supply Voltage (TEST CIRCUIT2, No input signal) 14.0 5 Supply Voltage V+ (V) 12 13 14 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 (TEST CIRCUIT1, Fs=1.75MHz/-10dBm, Fc=28.25MHz/-7dBm) 4 5 6 7 8 9 10 11 Supply Voltage V+ (V) 12 13 14 NJM2594 ! TYPICAL CHARACTERISTICS ( Ta=25°C,V+=5.0V, unless otherwise noted ) 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 OUTPUT2 Level note(1) versus Input Signal Frequency (TEST CIRCUIT1, Fs=1.75MHz/-10dBm, Fc=1 to 1000MHz/-7dBm) Fc+Fs OUTPUT2 Level (dB) OUTPUT2 Level (dB) OUTPUT2 Level note(1) versus Carrier Frequency Fs Fc 1 10 100 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 (TEST CIRCUIT1, Fs=1 to 1000MHz/-10dBm, Fc=28.25/-7dBm) Fs+Fc Fs Fc 1 1000 10 100 1000 Input Signal Frequency Fs (MHz) Carrier Signal Frequency Fc (MHz) OUTPUT2 Level note(1) versus Carrier Frequency OUTPUT2 Level (dB) (TEST CIRCUIT1, Fs=1.75MHz/-10dBm, Fc=1 to 1000MHz/-15/-7/0dBm) 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 Fs=0dBm Fs=-7dBm Fs=-15dBm Note : (1) OUTPUT2 level (dB): the ratio of OUTPUT2 Level to input signal level. 1 10 100 1000 Carrier Signal Frequency Fc (MHz) OUTPUT2 Level versus Input Signal Level 10 0 Fs+Fc 0 OUTPUT2 Level (dBm) OUTPUT2 Level (dBm) OUTPUT2 Level versus Carrier Signal Level (TEST CIRCUIT1, Fs=1.75MHz, Fc=28.25MHz/-7dBm) -10 -20 Fs -30 -40 Fc -50 -60 -70 (TEST CIRCUIT1, Fs=1.75MHz/-10dBm, Fc=28.25MHz) Fs+Fc -10 -20 -30 Fs -40 -50 Fc -60 -70 -80 -30 -25 -20 -15 -10 -5 0 5 10 Input Signal Level L-Fs (dBm) -30 -25 -20 -15 -10 -5 0 5 10 Carrier Signal Level L-Fc (dBm) OUTPUT2 Level versus Input Signal Level (TEST CIRCUIT1, Fs1=1.75MHz, Fs2=2MHz Fc=28.25MHz/-7dBm) OUTPUT2 Level (dBm) 0 Fs1+Fc -10 -20 -30 -40 IMD -50 -60 -70 -80 -90 -100 -20 -15 -10 -5 0 5 10 Input Signal Level L-Fs (dBm) -9- NJM2594 ! TYPICAL CHARACTERISTICS ( Ta=25°C,V+=5.0V, unless otherwise noted ) 2pin Output Voltage versus Ambient Temperature (TEST CIRCUIT2, No input signal) 14.0 13.5 13.0 12.5 12.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 2pin Output Voltage (V) Operating Current Icc (mA) Operating Current versus Ambient Temperature -50 -25 0 25 50 75 100 (TEST CIRCUIT2, No input signal) 4.5 4.4 4.3 4.2 4.1 4.0 3.9 3.8 3.7 3.6 3.5 125 -50 -25 2.5 5/6/7 pin Output Voltage (V) 3pin Output Voltage (V) (TEST CIRCUIT2, No input signal) 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 -50 -25 0 25 50 75 100 2.0 1.9 1.8 1.7 1.6 1.5 -50 -25 Intermodulation IMD (dB) Conversion Gain Gc (dB) -1 -2 -3 75 100 125 -50 Signal Leakage Level Ls (dB) Carrier Leakage Level Lc (dB) 0 25 50 75 Ambient Temperature (°C) - 10 - 100 125 -25 0 25 50 75 100 125 Carrier Leakage Level versus Ambient Temperature (TEST CIRCUIT1, Fs=1.75MHz/-10dBm, Fc=28.25MHz/-7dBm) -25 75 Ambient Temperature (°C) Signal Leakage Level versus Ambient Temperature -50 50 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 Ambient Temperature Ta(°C) 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 25 Intermodulation versus Ambient Temperature 0 50 0 (TEST CIRCUIT1, Fs1=1.75MHz/-14.42dBm,Fs2=2MHz/-14.42dBm, Fc=28.25MHz/-7dBm) 1 25 125 Ambient Temperatue (°C) 2 0 100 2.2 2.1 Conversion Gain versus Ambient Temperature -25 75 2.4 2.3 125 (TEST CIRCUIT2, Fs=1.75MHz/-10dBm, Fc=28.25MHz/-7dBm) -50 50 (TEST CIRCUIT2, No input signal) Ambient Temperature (°C) 3 25 5/6/7 pin Output Voltage versus Ambient Temperature 3pin Output Voltage versus Ambient Temperature 3.8 3.7 3.6 0 Ambient Temperature (°C) Ambient Temperature (°C) 100 125 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 (TEST CIRCUIT1, Fs=1.75MHz/-10dBm, Fc=28.25MHz/-7dBm) -50 -25 0 25 50 75 Ambient Temperature (°C) 100 125 NJM2594 [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. - 11 -