NJM2592

NJM2592 www.DataSheet4U.com 470MHz INPUT MIXER AND 455kHz FM IF DEMODULATOR IC GENERAL DESCRIPTION The NJM2592 is a wide-operating voltage, low-current FM IF demodulator IC with 455kHz(standard) IF frequency. It includes an oscillator, mixer, limiting amplifier, quadrature detector, active filter, and FSK comparator. The NJM2592 also has a RSSI circuit and RSSI comparator for carrier sense. NJM2592V PACKAGE OUTLINE FEATURES Wide Operating Voltage 1.8V to 9.0V Low Operating Current 2.2mA type. at V+ =2.0V, external local oscillator input Maximum Mixer Input Signal Frequency 470MHz (reference value) Level 0dBm Mixer Input Resistance 50Ω IF Frequency 455kHz (standard) Conventional Quadrature Detector External Phase-shifting Capacitor External Discriminator or LC Resonant Circuit RSSI Comparator with Open-Collector Output Quick Charge/Discharge Circuit for FSK Reference Voltage Bipolar Technology Package Outline SSOP20 BLOCK DIAGRAM MIX IN 20 SENSE RSSI CARRIER FSK CHARGE LPF SW OUT GND LEVEL OUT SENSE OUT 19 18 17 + 16 15 + 14 13 + FILTER AMP LPF IN 12 AF OUT 11 MIXER RSSI COMP FSK COMP BUFFER RSSI + IF AMP CHARGE QUAD DET OSC 1 OSC (B) 2 OSC (E) 3 MIX OUT 4 V+ 5 IF IN 6 DEC 7 8 9 10 QUAD IN IF FSK FSK OUT VREF1 VREF2 Ver.2004-08-25 -1- NJM2592 www.DataSheet4U.com ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation Mixer Input Signal Level Operating Temperature Storage Temperature SYMBOL V+ Pd VmixMAX Topr Tstg RATINGS 10.0 300 0 - 40 t...