NJM2761RB2-TE1

NJM2761 Audio Limiter  GENERAL DESCRIPTION The NJM2761 is the audio limiter for speaker protection. The limit level is adjustable by external resistor. It is suitable for PC, potable audio and others.  PACKAGE OUTLINE NJM2761RB2  FEATURES  Wide Operating Voltage  Variable Limit Level by external resistor  Low Output Noise  Bipolar Technology  Package Outline NJM2761V +2.7V to +13.0V 0.2 to1V -90dBV max. TVSP10, SSOP14  BLOCK DIAGRAM Vcc Vref INa OUTa INb OUTb SW INT Ver.0.5E SENSE -1- NJM2761  PIN CONFIGURATION TVSP10 1 10 2 9 3 8 4 7 5 6 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. V+ OUTa INa INT VREF SENCE SW INb OUTb GND 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. V+ OUTa INa INT VREF NC NC NC NC SENCE SW INb OUTb GND SSOP14 -2- 1 14 2 13 3 12 4 11 5 10 6 9 7 8 NJM2761 ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER SYMBOL + RATINGS UNIT 14 V Supply Voltage V Power Dissipation PD 320(TVSP10) 300(SSOP14) mW Operating Temperature Range Topr -20 to +75 C Storage Temperature Range Tstg -40 to +125 C ELECTRICAL CHARACTERISTICS +  POWER SUPPLY (Ta=25C, V =5V unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT - 2.7 5.0 13.0 V + Operating Voltage V Operating Current ICC No Signal - 1.5 2.0 mA Reference Voltage Vref No Signal 2.2 2.5 2.7 V  AC CHARACTERISTICS + (Ta=25C, V =5V, VIN=1Vrms/f=1kHz, Rsense=20k, BW=400-30kHz unless otherwise specified) PARAMETER Limit Level 1 SYMBOL TEST CONDITION GLIM1 + MIN. TYP. MAX. UNIT 150 200 250 mVrms Limit Level 2 GLIM2 V =13V,Rsense=4k,VIN=2Vrms 0.7 1.0 1.3 Vrms Limit Off GOFF SW=2V 0.9 1.0 1.1 Vrms Output Noise VNO - -100 (10) -90 (31.6) dBV (Vrms) THD+N - - 1 % CT - - -70 dB - -70 (316) dBV (Vrms) Total Harmonic Distortion Cross Talk Ripple Rejection RR RS=0, A-weighting, Vripple=100mVrms, f=1kHz - +  CONTROL CHARACTERISTICS (Ta=25C, V =5V unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Low Level Input Voltage VIL - - - 0.5 V High Level Input Voltage VIH - 2.0 - - V CONTROL TERMINAL EXPLANATION SW(TVSP10:7pin, SSOP14:11pin) MODE STATUS NOTE Limiter ON L Limiter is active. Limiter OFF H Limiter is not active. -3- NJM2761 TERMINAL DESCRIPTION No, SYMBOL TVSP10(SSOP14) FUNCTION 1 V+ Power Supply Terminal 2 9(13) OUTa OUTb Ach Output Terminal Bch Output Terminal EQUIVALENT CIRCUIT VOLTAGE - OUTa OUTb 100 V+/2 1k 3 8(12) INa INb INa INb Ach Input Terminal Bch Input Terminal V+/2 96k 48k 4 INT Smoothing Capacitor Connection Terminal INT 400 0.7V 300k 5 VREFIN Reference Voltage Stabilizing Capacitor Connection Terminal VREFIN 300k V+/2 300k -4- NJM2761 TERMINAL DESCRIPTION No. SYMBOL TVSP10(SSOP14) FUNCTION EQUIVALENT CIRCUIT VOLTAGE 12k 6(10) SENSE Resister Connection Terminal for Limit Level Setting 7(11) SW Limiter ON/OFF Switch SENSE 0V SW 150k 270k 10(14) GND Ground Terminal - -5- NJM2761 APPLICATION CIRCUIT TVSP10 V+ 0.22μF GND 10 OUTb 9 INa INb 8 4 INT SW 7 5 VREF SENSE 6 1 V+ 2 OUTa 3 1μF 1μF 0.22μF 0.022μF 0.22μF 0.22μF RSENSE V + SSOP14 0.22uF 1uF 0.22uF 0.022uF 0.22uF G ND 1 V+ 2 O UTa 3 IN a IN b 4 IN T SW 5 VR EF O UTb SEN SE 14 13 12 1uF 0.22uF 11 10 RSE NSE 6 NC NC 9 7 NC NC 8 * The limit level is twice as much as set point when a signal is input into a either one channel of Ach or Bch. * For the above reason, monaural signal should input both INa and INb. RSENSE=4000/Vlim[Ohm] Vlim: Limit level(Vrms) Limit range: 200mVrms to 1Vrms (20k to 4kOhm) * Please be careful of leakage current from the surrounding wiring because the INT terminal is high impedance. -6- NJM2761 TYPICAL CHARACTERISTICS V+ - Icc Icc-Temperature V+=5V,No-Signal,Limiter=ON,Rsense=20k  2 2 1.5 Icc[mA] Icc[mA] 1.5 1 0.5 0 V+=5V,No-Signal,Limiter=ON,Rsense=20k  1 0.5 0 5 10 0 15 -20 0 20 40 60 80 o Vcc[V] Temperature [C ] Limit Response-V + Limit Response-Rsense Vin=0dBV,Limiter=ON,Rsense=20k  V+=5V,f=1kHz,Limiter=ON Rsense=4k 1 1 V+=5.0V Rsense=20k 0.1 0.01 0.01 0.1 Output[Vrms] Output [Vrms] Rsense=8k V+=2.7V 0.1 V+=13.0V 0.01 0.01 1 0.1 Input[Vrms] 1 Input[Vrms] Limit Response-Temperature Vom V+=5V,Vin=0dBV,Limiter=ON,Rsense=20k  10 f=1kHz,Limiter=OFF,Rsense=20k  1 + V =2.7V 0.1 o V =5.0V 75C o 1 THD[%] Output [Vrms] + -20C 25C o + V =13.0V 0.1 0.01 0.01 0.1 Input[Vrms] 1 0.01 0.0001 0.001 0.01 0.1 1 Input[Vrms] -7- NJM2761 TYPICAL CHARACTERISTICS THD-Vcc 10 THD-Temperature f=1kHz,Limiter=ON,Rsense=20k  10 V+=5V,Vin=0dBV,Limiter=ON,Rsense=20k  + V =2.7V + V =5.0V THD[%] 1 THD[%] 1 + V =13.0V 0.1 -20C o 0.1 75C o 25C o 0.01 0.001 0.01 0.1 0.01 0.001 1 0.01 Input[Vrms] 1 Input[Vrms] Ripple Rejection Cross Talk -60 0.1 V+=5V,Vin=0dBV,Limiter=ON,Rsense=20k  0 V+=5V,Vripple=100mVrms,Limiter=ON -65 -20 -75 Ripple[dBV] Cross Talk[dB] -70 -80 25C -85 o 75C o -90 25C o -20C -60 o -80 -95 -100 -40 -20C o 100 75C o 1000 Frequency[Hz] 10000 -100 100 1000 10000 Frequency[Hz] [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. -8-