NJM2204A LOG AMPLIFIER GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2204A is an integrated IF limitting amplifier which contains temperature compensated reference power supply, 6 stage differential limitting amplifier and 6 stage logarithmic suppression circuit. Its votage gain is 58dB and linearity is 1dB within 50dB log dynamic range. The voltage gain and log dynamic range are NJM2204AD enlarged by connecting multiple stages. The NJM2204A is suitable to telecommunication equipment. FEATURES Wide log dynamic range (50dB) Wide linearity range (1dB) Large Voltage Gain (60dB) Wide stable operating supply voltage range (8 to 12V) Wide stable operating temperature range (-20 to 85C) Package Outline DIP16 Bipolar Technology APPLICATION Cellular Personal wireless Radio Business wireless Radio Handy talky PIN CONFIGURATION Pin No. Pin Name Function 1 RF IN AC Signal Input (C-coupling) 2 LOG OUT 1 LOG Detector Output (from 1st stage) 3 GND1 Ground 1 4 V 1 Internal Reference Voltage 1 REF 5 V Compensation Input to Reference Voltage COMP 6 V Compensated Output of Reference Voltage st 7 GND2 Ground 2 8 EXT C2 Terminate with C 9 RF OUT Limited AC Output NJM2204AD 10 V2 Internal Reference Voltage2 REF 11 LOG OUT 4 LOG Detector Output (from 6th stage) NJM2204AD 12 LOG OUT 3 LOG Detector Output (from 4th and 5th stage) + 13 V 2 Supply Voltage Input 2 14 EXT C1 Terminate with C 15 LOG OUT 2 LOG Detector Output (from 2nd and 3rd stage) + 16 V 1 Supply Voltage Input 1 Ver.2003-12-09 -1- NJM2204A BLOCK DIAGRAM NJM2204AD + LOG DETECTOR OUTPUT CHARACTERISTICS(EXAMPLE) (T =25C, V =9V, V =6.0V) a REF PARAMETER TEST CONDITION MIN. TYP. MAX. UNIT fIN=455kHz, VIN=8dB (50 termination) 0.976 1.004 1.032 V f =455kHz, V =-2dB (50 termination) 0.868 0.896 0.924 V IN IN f =455kHz, V =-12dB (50 termination) 0.727 0.755 0.783 V IN IN f =455kHz, V =-22dB (50 termination) 0.586 0.614 0.642 V IN IN Log Detector Output f =455kHz, V =-32dB (50 termination) 0.446 0.474 0.502 V IN IN f =455kHz, V =-42dB (50 termination) 0.305 0.333 0.361 V IN IN f =455kHz, V =-52dB (50 termination) 0.164 0.192 0.202 V IN IN f =455kHz, V =-62dB (50 termination) 0.057 0.085 0.113 V IN IN Log Detector Linearity T =-20C to 85C, V =-2 to -52dBm - - 1 dB a IN * Log Detection Linearity : It is error between RF input level and ideal input level to straight line connected two detection output points of two input level (-2dBm, -52dBm). * Temperature coefficient of Log detection output voltage : approximately 90V / C Typ. (-20 to +85C). TEST CIRCUIT Ver.2003-12-09 - 2 -