NJM2292V

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. ■ PACKAGE OUTLINE NJM2292V ■ FEATURES ● Low Operating Voltage ● Low Operating Current ● Maximum input frequency ● A ceramic discriminator is available ● Package Outline ● Bipolar Technology (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 Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL V + (Ta=25°C) RATINGS 10 300 -30 to +85 -40 to +125 UNIT V mW °C °C Pd Topr Tstg Ver.2003-12-09 -1- NJM2292 ■ 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 (V+=2.4V, fC=21.7MHz, fmod=1kHz 1mV, fdev=±3kHz, Ta=25°C) TEST CONDITION No signal, Squelch off 20 2.7 -3dB limiting VI=1mVrmsy, 1kHz Rrs=18kΩ, IFin=100mVrms Rrs=18kΩ, No signal Rhys=4.7kΩ 50 45 0.75 0.65 30 1.0 2.2 0.2 MIN. TYP. 2.0 25 3.6 3.0 70 48 0.9 0.9 80 1.4 MAX. 2.7 UNIT mA dB kΩ µVrms mVrms dB V V V mV V V V V 4.5 1.05 1.2 0.5 105 1.8 0,2 30kΩ pull up 30kΩ pull up ■ TEST CIRCUIT -2- Ver.2003-12-09 NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) FUNCTION These terminals are connected with a crystal resonator to construct a colpitts circuit. EQUIVALENT CIRCUIT 1 OSC IN 2.4V 2 OSC OUT 1.7V 3 NC No connection. Amixer output. 4 MIX OUT 1.47V 5 V + 2.4V 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.) 6 LIM IN 1.59V 7 DEC1 1.59V 8 DEC2 1.59V A limiter output 9 LIM OUT - Ver.2003-12-09 -3- NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) FUNCTION A quadrature detector input EQUIVALENT CIRCUIT 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 AMP IN - -4- Ver.2003-12-09 NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) FUNCTION An operational amplifier output. EQUIVALENT CIRCUIT 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 SQ OUT - Ver.2003-12-09 -5- NJM2292 ■ TERMINAL FUNCTION (V+=2.4V) PIN NO. SYMBOL PIN VOLTAGE(typ.) FUNCTION A hysteresis control terminal. (ESD protection diodes are connected internally with this terminal.) EQUIVALENT CIRCUIT 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