NJM2591 100MHz INPUT 450kHz FM IF DEMODULATOR IC FOR VOICE GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2591 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 NJM2591 also has a noise detector and noise comparator with hysteresis range. NJM2591V FEATURES Wide Operating Voltage 1.8V to 9.0V + Low Operating Current 2.5mA type. at V =2.0V Maximum Input Frequency 100MHz ( reference value ) IF Frequency 450kHz ( standard ) Bipolar Technology Package Outline SSOP16 BLOCK DIAGRAM MIX NOISE NOISE IF AF IN GND REC DET RSSI OUT QUAD OUT 16 15 14 13 12 11 10 9 LPF MIXER RSSI NOISE QUAD COMP DET NOISE DET BUFFER IF AMP NOISE AMP FILTER OSC AMP 1 2 3 4 5 6 7 8 V+ IF IN DEC FIL OSC OSC MIX FIL IN OUT IN OUT OUT Ver.2018-03-09 - 1 - NJM2591 ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL RATINGS UNIT + Supply Voltage V 10.0 V Power Dissipation P 300 mW D Operating Temperature T o p r - 30 to +85 C Storage Temperature T s t g - 40 to +125 C RECOMMENDED OPERATING CONDITION (Ta=25C) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT + Supply Voltage V 1.8 2.5 9.0 V ELECTRICAL CHARACTERISTICS + (Ta=25C, V =2.0V, fmix=21.7MHz, flo=21.25MHz, fif=450kHz, fmod=1kHz, fdev=1.5kHz, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Current Consumption I c c q No Signal - 2.5 - mA Without filter, Mixer Conversion Gain G m i x VinMIX=46dBuVEMF, 21 24 27 dB Pin3 is terminated with 1.8k Mixer 3rd Order Intercept IP3 - 96 - dBuVEMF Mixer Input Resistance R i n M - (10) - k Mixer Input Capacitance C i n M - (3.2) - pF Mixer Output Resistance R o M 1.2 1.8 2.4 k 12 dB S/N 12 d B S / N - 11 - dBuV IF input Audio Output Voltage V o d 70 100 130 mVrms VinIF=80dBuVEMF IF input Signal to Noise Ratio S / N 43 65 - dB VinIF=80dBuVEMF IF input, AM=30% AM Rejection Ratio A M R - 40 - dB VinIF=80dBuVEMF IF Amplifier Input Resistance R i n I F 1.2 1.8 2.4 k + V =3.0V, IF input RSSI Output Voltage 1 V r s s i 1 0.2 0.36 0.52 V VinIF=30dBuVEMF + V =3.0V, IF input RSSI Output Voltage 2 V r s s i 2 1.4 2.0 2.6 V VinIF=100dBuVEMF Noise Detector Output Voltage V n e d t Isink=0.2mA - 0.1 0.5 V Noise Detector Output Leak Current I l e a k Vnrec=0.6V,Vnedt=2V - 0 5 uA Noise Detector Level High V t h - h - 0.5 0.7 V Noise Detector Level Low V t h - l 0.3 0.4 - V The values shown in parenthesis are reference values. Ver.2018-03-09 - 2 -