NJM2552 100MHz INPUT MIXER AND 450kHz FM/AM IF DEMODULATOR IC GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2552 is a FM IF demodulator IC with 450kHz (standard) IF input, which operates from 2.2V to 9.0V supply. It includes an oscillator, mixer, limiting amplifier, FM/AM detectors, and RSSI circuit. The NJM2552 is suitable for FM /AM receivers for data / voice radio systems. NJM2552V FEATURES Wide Operating Voltage 2.2V to 9.0V + Low Operating Current FM: 2.5mA at V =2.7V, AM SW =LOW + AM and FM: 5mA at V =2.7V, AM SW =HIGH Maximum Mixer Input Frequency 100MHz (reference value) IF Frequency 450kHz (standard) AM/FM detector circuits selectable AM SW= HIGH Simultaneous operation of AM/FM sections AM SW= LOW FM section only Built-in AGC circuit in AM section Wide Range RSSI (Received Signal Strength Indication) Bipolar Technology Package Outline SSOP20 BLOCK DIAGRAM MIX FM AF AM AGC RSSI AM AF RF AGC AM AMP AMP + V IN IN OUT OUT OUT OUT SW OUT IN 20 19 18 17 16 15 14 13 12 11 AM DET -A AMP RSSI MIXER OSC AGC AM AMP + - AMP FM AMP FM + DET - 1 2 3 4 5 6 7 8 9 10 QUAD OSC MIX FM FM IF OSC AM IF AM GND FM IF IN (E) OUT DEC OUT IN (B) IN DEC Ver.2018-03-23 - 1 - NJM2552 ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL RATINGS UNIT + Supply Voltage V 12 V Power Dissipation P d 300 mW Operating Temperature T o p r -40 to +85 C Storage Temperature T s t g - 50 to +125 C RECOMMENDED OPERATING CONDITION (Ta=25C) PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT + Supply Voltage V 2.2 2.7 9.0 V ELECTRICAL CHARACTERISTICS + Ta=25C, V =2.7V, fMIX=10.7MHz, fLO=10.25MHz, fIF=450kHz, FM: fdev=3kHz, fmod=1kHz, AM SW=LOW AM: AM=30%, fmod=1kHz, AM SW=HIGH, unless otherwise noted. PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT No signal, Circuit 1 Current Consumption I c c q 1 - 5 6.6 mA AM SW=HIGH No signal, Circuit 1 Current Consumption I c c q 2 - 2.5 3.1 mA AM SW=LOW VinMIX=40dBuV, Mixer Conversion Gain G m i x Pin3 with ceramic filter and 18 22 26 dB 1.8k terminated. Circuit5 Mixer 3rd Order Intercept IIP3 Circuit5 - 95 - dBuV Mixer Input Resistance R i n M - 3.6 - k Mixer Input Capacitance C i n M - 3.2 - pF Mixer Output Resistance R o M - 1.8 - k FM IF Section SINAD 12dB S I N A D Mixer input, Circuit 2 - 5 - dBuV fIF input, Circuit 4 Demodulated Output Level 1 V o d 1 55 80 105 mVrms VinIF =80dBuV fIF input, Cricuit4 Total Harmonic Distortion 1 T H D 1 - 1 2 % VinIF =80dBuV fIF input, Circuit4 Signal to Noise Ratio 1 S / N 1 43 60 - dB VinIF=80dBuV fIF input, Circuit4 AM Rejection Ratio A M R 30 40 - dB VinIF=80dBuV, AM=30% Ver.2018-03-23 - 2 -