NJM2292 NARROW BAND FM IF IC ■ GENERAL DESCRIPTION The NJM2292 is a narrow band FM IF IC designed for use in cordless telephones and amature radios, etc...It contains almost all blocks of the narrow band FM IF system-a mixer, an IF amplifier, an RSSI and a Quadrature detector, for example. It features low supply current to make a sharp reduction of total power consumption possible. ■ FEATURES ● Low Operating Voltage ● Low Operating Current ● Maximum input frequency ● A ceramic discriminator is available ● Package Outline ● Bipolar Technology ■ PACKAGE OUTLINE NJM2292V (1.8 to 7.0V) (20mA typ. @V+=2.4V) (100MHz) SSOP20 ■ APPLICATIONS ● Amature radios ● Cordless telephones, etc. ■ PIN CONFIGURATION NJM2292V ■ ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage (Ta=25°C) SYMBOL + V RATINGS UNIT 10 V Power Dissipation Pd 300 mW Operating Temperature Range Topr -30 to +85 °C Storage Temperature Range Tstg -40 to +125 °C Ver.2003-12-09 -1- NJM2292 (V+=2.4V, fC=21.7MHz, fmod=1kHz 1mV, fdev=±3kHz, Ta=25°C) ■ ELECTRICAL CHARACTERISTICS PARAMETER Operating Current Mixer Gain Input resistance Limiting sensitivity Audio output voltage Filter amplifier gain Filter amplifier output voltage RSSI maximum output voltage RSSI minimum output voltage Squelch Hysteresis Squelch output voltage High level Low level Squelch inverted output voltage High level Low level SYMBOL ICC GMIX RMIX LIMIT VOUT Af Vref VRMAX VRMIN Hys SPHI SPLO SNHI SNLO TEST CONDITION MIN. No signal, Squelch off 20 2.7 Rrs=18kΩ, IFin=100mVrms Rrs=18kΩ, No signal Rhys=4.7kΩ 30kΩ pull up 30kΩ pull up MAX. UNIT 2.0 2.7 mA 50 45 0.75 0.65 25 3.6 3.0 70 48 0.9 0.9 30 1.0 80 1.4 -3dB limiting VI=1mVrmsy, 1kHz TYP. 4.5 1.05 1.2 0.5 105 1.8 0,2 2.2 0.2 dB kΩ µVrms mVrms dB V V V mV V V V V ■ TEST CIRCUIT -2- Ver.2003-12-09 NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) 1 OSC IN 2.4V 2 OSC OUT 1.7V 3 NC FUNCTION EQUIVALENT CIRCUIT These terminals are connected with a crystal resonator to construct a colpitts circuit. No connection. Amixer output. 4 MIX OUT 5 V 2.4V 6 LIM IN 1.59V 7 DEC1 1.59V 8 DEC2 1.59V + 1.47V Supply voltage A limiter input and decoupling terminals. The 7 and 8 pins are connected with about 100µF capacitors. (ESD protection diodes are connected internally with each terminal.) A limiter output 9 Ver.2003-12-09 LIM OUT - -3- NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) FUNCTION EQUIVALENT CIRCUIT A quadrature detector input 10 QUAD COIL - The output of the FM demodulated signal. 11 AF OUT 1.18V An RSSI output. The output current signal is in logarithmic proportion to the input signal. 12 RSSI - An operational amplifier inverted input. 13 -4- AMP IN - Ver.2003-12-09 NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) FUNCTION EQUIVALENT CIRCUIT An operational amplifier output. 14 AMP OUT - A squelch amplifier input. (ESD protection diodes are connected internally with this terminal.) 15 SQ IN - A squelch amplifier input. (ESD protection diodes are connected internally with this terminal.) 16 SQ OUT - A squelch amplifier inverted output. (ESD protection diodes are connected internally with this terminal.) 17 Ver.2003-12-09 SQ OUT - -5- NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) FUNCTION EQUIVALENT CIRCUIT A hysteresis control terminal. (ESD protection diodes are connected internally with this terminal.) 18 HYSTERESIS CONTROL - 19 GND 0V Ground A mixer input 20 MIX IN 2.4V [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. -6- Ver.2003-12-09