100MHz INPUT 450kHz FM IF DEMODULATOR IC FOR VOICE

Transcription

1 MHz PUT 45kHz FM IF DEMODULATOR IC FOR VOICE GENERAL DESCRIPTION PACKAGE LE The NJM59 is a wide - operating voltage, low current FM IF demodulator IC for voice application. It includes an oscillator, mixer, limiting amplifier, quadrature detector, and active filter. The NJM59 also has a noise detector and noise comparator with hysteresis range. NJM59V FEATURES Wide Operating Voltage.8V to 9.V Low Operating Current.5mA type. at V + =.V Maximum Input Frequency MHz ( reference value ) IF Frequency 45kHz ( standard ) Bipolar Technology Package Outline SSOP6 BLOCK DIAGRAM MIX IF AF REC DET RSSI QUAD MIXER COMP RSSI QUAD DET LPF BUFFER DET OSC IF AMP AMP FILTER AMP OSC OSC MIX IF DEC FIL FIL Ver

2 ABSOLUTE MAXIMUM RATGS (Ta=5 C) PARAMETER SYMBOL RATGS UNIT Supply Voltage V +. V Power Dissipation P D 3 mw Operating Temperature T o p r - 3 to +85 C Storage Temperature T s t g - 4 to +5 C RECOMMENDED OPERATG CONDITION (Ta=5 C) PARAMETER SYMBOL TEST CONDITIONS M. TYP. MAX. UNIT Supply Voltage V V ELECTRICAL CHARACTERISTICS (Ta=5 C, V + =.V, fmix=.7mhz, flo=.5mhz, fif=45khz, fmod=khz, fdev=±khz, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITIONS M. TYP. MAX. UNIT Current Consumption I c c q No Signal ma Mixer Conversion Gain G m i x Without filter, VinMIX=46dBuVEMF, Pin3 is terminated with.8kω 4 7 db Mixer 3rd Order Intercept IP dbuvemf Mixer Input Resistance R i n M - () - kω Mixer Input Capacitance C i n M - (3.) - pf Mixer Output Resistance R o M..8.4 kω db S/N d B S / N - - dbuv Audio Output Voltage Signal to Noise Ratio AM Rejection Ratio V o d S / N A M R IF input VinIF=8dBuVEMF IF input VinIF=8dBuVEMF IF input, AM=3% VinIF=8dBuVEMF 7 3 mvrms db db IF Amplifier Input Resistance R i n I F..8.4 kω RSSI Output Voltage V r s s i RSSI Output Voltage V r s s i V + =3.V, IF input VinIF=3dBuVEMF V + =3.V, IF input VinIF=dBuVEMF V.4..6 V Noise Detector Output Voltage V n e d t Isink=.mA -..5 V Noise Detector Output Leak Current I l e a k Vnrec=.6V,Vnedt=V - 5 ua Noise Detector Level High V t h - h V Noise Detector Level Low V t h - l V The values shown in parenthesis are reference values. - - Ver.-6-8

3 TEST CIRCUIT This test circuit allows the measurement of all parameters described in ELECTRICAL CHARACTERISTICS. This test circuit includes some electrical switches that should be in the suitable position for the measurement of each parameter. REC DET RSSI QUAD.3 to 3kHz p V + p u 3.3k.u 9p 5 CD MIX.mA AF.7MHz AUDIO MIXER COMP RSSI QUAD DET LPF BUFFER DET OSC IF AMP AMP FILTER AMP p.5 MHz.8k 56p MIX SW u.u IF FILTER V + IF B A IF SW.u.u 5 5k p 45kHz p k 5.6k 3kHz MIX IF FILTER: CFWKA45KGFA (Murata Manufacturing Co., Ltd., JAPAN) Ceramic discriminator CD: CDBLA45KCAY4 (Murata Manufacturing Co., Ltd., JAPAN) CERAMIC DISCRIMATOR (especially designed for NJM59) To optimize some important performance, the following ceramic discriminator is available. For more information on this CD and 455KHz CD, please contact the CD supplier. CDBKB45KCAY7 (Murata Manufacturing Co., Ltd., JAPAN with the external capacitance Cd of 33pF (instead of 9pF) Ver

4 TERMAL FUNCTION (Ta=5 C, V + =.V) Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION OSC k.97v 3uA OSC.7V Local Oscillator Input and Output. Adding an external oscillator element of crystal unit or SAW resonator forms Colpitts - type oscillator. Output of an external oscillator circuit can also input to pin or pin. Mixer Output. Typical input impedance is.8kω. 3 MIX 558mV.6k ua IF.98V 5k Supply Voltage. IF Limiter Amplifier Input. Typical input impedance is.8kω DEC 6.98V IF Decoupling. An external decoupling Capacitor is connected. ua 7 FIL 69mV Amplifier Output and Input. External RC components form a band pass filter FIL 8k 66mV Ver.-6-8

5 Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION ua Demodulated Signal Output. 9 9 AF 78mV 5k 5k 4 4 QUAD.V Quadrature Detector Input. Adding a 9 degree-phase shifter forms a quadrature detector circuit. A 9 degree-phase shifter mainly consists of a discriminator and a resistor. ua IF Output. Output of IF Amplifier IF.8V 6uA RSSI 7.8mV Received Signal Strength Indicator (RSSI) Output. The output signal level is in logarithmic proportion to the IF limiter amplifier input signal of pin5. 45k Ver

6 Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION 3 DET -- 3 Noise Comparator Output. The result of noise comparator is output by comparing the output voltage of pin4 with internal reference. Noise Detector Output. The output of filter amplifier is rectified to direct current by external capacitor. 4 REC 67.3mV 4 7k Ground. Mixer Input. Doubly balanced to reduce spurious radiation. 6 MIX.V 6 Note. ESD protection diodes exist between each of all terminals and V +.. ESD protection diodes also exist between each terminal and ground Ver.-6-8

7 EVALUATION BOARD The evaluation PC board is useful for your design and is intended to have more understanding of the usage and performance of this device. The circuit of this board is the same as TEST CIRCUIT. For other electrical conditions, it should be necessary to reconsider each value of external components. Note that this board is not prepared to show the recommendation of pattern and parts layout. Circuit Diagram R6 REC DET RSSI V + MIX R7 5 C8 p C7.u C6 p C u C9 CD R4.7k AF.3 to 3kHz AUDIO.7MHz 33p MIXER COMP RSSI QUAD DET LPF BUFFER DET OSC IF AMP AMP FILTER AMP R 8 5 C p LOCAL.5MHz V + CF C u R9 Short or Open R8 Open or Short C5.u C.u IF R5 5 C3 C4 45kHz R3 k R 5.6k 3kHz Note. This board is designed for mixer-input type and R9 / R8 are factory-configured as follows : R8 : open R9 : chip resistor of Ω For the case of IF-input type, please change the position of the chip resistor of Ω as follows ; R8 : chip resistor of Ω R9 : open. External components CF=CFWKA45KGFA-R (Murata) CD=CDBKB45KCAY7-R (Murata) Ver

8 Circuit Side View MIX LOCAL C8 R7 REC C7 R9 R8 IF R8 R9 C5 R5 CF C R C R R3 C3 C4 NJM 59 C9 R4 CD C6 R6 DET RSSI Ground Side View AF C C Note. External Components C, C, C6, C8=pF C, C7, C5=.uF C3, C4=pF C9=33pF R=5kΩ R=5.6kΩ R3=kΩ R4=.7kΩ R5, R7=5Ω R6=kΩ R9 =OΩ R8=open C, C=uF CF=CFWKA45KGFA-R(Murata) CD=CDBKB45KCAY7-R(Murata). There are two terminals for. For proper operation, both of these terminals are necessary for power supply Ver.-6-8

9 TYPICAL CHARACTERISTICS ( Ta=5 C, V + =.V, unless otherwise noted ) Current Consumption Iccq (ma) Current Consumption versus Supply Voltage No signal Audio Output Voltage Vod (mvrms) Audio Output versus Supply Voltage fif=45khz,vinif=8dbuvemf,fmod=khz,fdev=±khz,if SW:A Supply Voltage (V) Supply Voltage (V) RSSI Output versus Supply Voltage -Mix.Input- fmix=.7mhz,vinmix=4dbuvemf,flo=.7mhz.5.5 RSSI Output versus Supply Voltage -IF Input- fif=45khz,vinif=6dbuvemf RSSI Output Vrssi (V) RSSI Output Vrssi (V) Supply Voltage (V) Supply Voltage (V) S/N versus Supply Voltage -Mix.Input- S/N versus Supply Voltage - IF Input - fmix=.7mhz,fmod=khz,fdev=±khz,am=3%,flo=.5mhz,if SW:B 7 7 fif=45khz,fdev=±khz,fmod=khz,if SW:A Signal to Noise Ratio S/N (db) Signal to Noise Ratio S/N (db) Supply Voltage (V) Supply Voltage (V) Ver

10 Audio Out db S/N Sensitivity versus Supply Voltage fmix=.7mhz,fmod=khz,fdev=±khz,flo=.5mhz,dbuv,if SW:B Mixer Input Level (dbuvemf) Supply Voltage (V) IF Detuning (db) IF Detuning characteristics fif=45khz,vinif=8dbuvemf,fdev=±khz,fmod=khz,if SW:A Relative Frequency to fif(khz) Mixer Conversion Gain versus Frequency Mixer Conversion Gain versus OSC Input 6 fif=45khz,mix :.8kΩ term. 3 fif=45khz,mix :.8kΩ term.,=.v Mixer Conversion Gain Gmix (db) Mixer Conversion Gain Gmix (db) MHz MHz Mixer Input Frequency fmix (MHz) 6 8 Local OSC Input Level (dbuv) Mixer Output Level (dbuvemf) Mixer 3rd Order Intercept fmix=.7mhz,flo=.5mhz,mix :.8kΩ term Mixer Input Level VinMIX (dbuvemf) AF Output Voltage (Vdc) AF Output versus Frequency : S-Curve VinIF=8dBuVEMF,Without.3-to-3kHz filter,if SW:A IF Frequency fif (khz) - - Ver.-6-8

11 S+N,N,AMR versus Mixer Input fmix=.7mhz,fmod=khz,fdev=±k,am=3%,flo=.5mhz,if SW:B S+N - - S+N,N,AMR versus IF Input fif=45khz,fdev=±khz,fmod=khz,am=3%,if SW:A S+N S+N,N,AMR (db) AMR N S+N,N,AMR (db) AMR N Mixer Input VinMIX (dbuvemf) IF Input VinIF (dbuvemf) RSSI Output Voltage versus Mixer Input RSSI Output Voltage versus IF Input.5 fmix=.7mhz,flo=.7mhz,if SW:B.5 fif=45khz,if SW:A RSSI Output Voltage Vrssi (Vdc).5 = 9V 3V V RSSI Output Voltage Vrssi (Vdc).5 = 9V 3V V Mixer Input Level VinMIX (dbuvemf) IF Input Level VinIF (dbuvemf) Noise Comparator Characteristics Noise Detector Characteristics. fnoise=3khz DET Output Vndet (V).5.V REC Output (V) REC Output (V) Filter Amplifier Input (mvrms) Ver

12 REC Output versus Temperature Current Consumption versus Temperature.8 fnoise=3khz,fil :.mvrms input 3. REC Output (V) Ambient Temperature ( C) Current Consumption Iccq (ma) Ambient Temperature ( C) Mixer Convesion Gain versus Temperature Audio Output versus Temperature 6 fmix=.7mhz,flo=.5mhz,mix :.8kΩ term. fif=45khz,vinif=8dbuvemf,fmod=khz,fdev=±khz Mixer Conversion Gain Gmix(dB) Audio Output Vod(mVrms) Ambient Temperature ( C) Ambient Temperature ( C ) RSSI Output versus Temperature -Mix.Input- RSSI Output versus Temperature -IF Input-.5 =3.V,fmix=.7MHz,flo=.7Mz.5 =3.V,fif=45kHz RSSI Output Voltage Vrssi (Vdc).5 8dBuVEMF 5dBuVEMF 3dBuVEMF dbuvemf RSSI Output Voltage Vrssi (Vdc).5 dbuvemf 7dBuVEMF 5dBuVEMF 3dBuVEMF Ambient Temmerature ( C) Ambient Temperature ( C) - - Ver.-6-8

13 [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