NJM2750 4 INPUT / 1 OUTPUT STEREO AUDIO SELECTOR ■ GENERAL DESCRIPTION The NJM2750 is 4 Input / 1 Output Stereo Audio Selector. Based on the internal Switch OP-AMP technology, the NJM2750 has lower Output Noise, lower Distortion and higher Channel Separation than the ordinary Multiplexers or Analogue Switches. The NJM2750 is suitable for any kinds of audio equipments, such as TV, Car Stereo, Mini-Compo and so on. ■ PACKAGE OUTLINE NJM2750M ■ FEATURES ● Operating Voltage (4.7 to 13V) ● 4 Input / 1 Output Audio Selectors ● Dual Channel for Stereo Use ● Low Output Noise (-110dBV typ.) ● Low Distortion (0.005% typ.) ● Bipolar Technology ● Package Outline (DMP16) ■ BLOCK DIAGRAM ■ PIN CONFIGURATION 1 16 GND CNT1 2 15 OUTa 14 V+ 13 IN3a IN1a IN2a V+ 3 CNT2 4 LOGIC bias IN4a 5 12 Vref IN1b 6 11 OUTb IN2b 7 10 (N.C.) IN4b 8 9 IN3b PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SYMBOL IN1a CNT1 IN2a CNT2 IN4a IN1b IN2b IN4b IN3b (N.C.) OUTb Vref IN3a V+ OUTa GND FUNCTION Ach INPUT SELECTOR CONTROL 1 Ach INPUT SELECTOR 2 CONTROL 2 Ach INPUT SELECTOR 4 Bch INPUT SELECTOR 1 Bch INPUT SELECTOR 2 Bch INPUT SELECTOR 4 Bch INPUT SELECTOR 3 NO CONNECT Bch OUTPUT REFERENCE VOLTAGE Ach INPUT SELECTOR 3 POWER SUPPLY Ach OUTPUT GROUND -1- NJM2750 ■ ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL RATING UNIT + Supply Voltage V 15 V Power Dissipation PD 300 mW Operating Temperature Range TOPR -40 to +85 °C Storage Temperature Range TSTR -40 to +125 °C + ■ ELECTRICAL CHARACTERISTICS ( Ta=25°C, V =9V) PARAMETER SYMBOL + Operating Voltage V Supply Current ICC Reference Voltage No Signal VREF Voltage Gain Total Harmonic Distortion TEST CONDITION MIN. TYP. MAX. UNIT 4.7 9.0 13.0 V - 10 20 mA - 4.5 - V GV Vin=1Vrms, f=1kHz -1 0 1 dB THD+N Vin=1Vrms, f=1kHz 6 (2.0) 0.005 -110 (3) 8 (2.5) 0.05 -100 (10) % dBV (µVrms) dBV (Vrms) 70 90 - dB 70 90 - dB Output Noise Voltage VNO A-Weighted Maximum Output Voltage VOM f=1KHz, THD=1% Cross Talk CT Channel Separation CS Switch-ON Voltage Level VCH 2.4 - - V Switch-OFF Voltage Level VCL - - 0.8 V Vin=1Vrms, f=1kHz, A-Weighted Vin=1Vrms, f=1kHz, A-Weighted ■ SWITCH CONTROL LOGIC CNT2 CNT1 INPUT SELECTOR Ach / Bch L L 1 L H 2 H L 3 H H 4 -2- - NJM2750 ■ TERMINAL DESCRIPTION PIN No. SYMBLE 1 3 5 6 7 8 9 13 IN1a IN2a IN4a IN1b IN2b IN4b IN3b IN3a 2 4 CNT1 CNT2 EQUIVALENT CIRCUIT V+ VOLTAGE NOTE V+/2 180 IN1a IN2a IN3a IN4a IN1b IN2b IN3b IN4b 100K VREF GND V+ 0V (GND) 180 CNT1 CNT2 100K GND 11 15 OUTb OUTa V+ V+/2 OUTa OUTb 30 GND 12 Vref V+ V+/2 45K 30 Vref 60K GND 14 16 V+ GND V+ V+ 0V GND -3- NJM2750 ■ APPLICATION CIRCUIT + IN1a 1 16 GND 0.1uF 10k 100k CNT1 2 15 + OUTa 4.7uF + 10uF + IN2a V+ 3 14 9V V+ 0.1uF 10k + CNT2 4 13 LOGIC IN3a + IN4a bias 5 12 Vref 0.1uF + + 10uF IN1b 6 11 + OUTb 0.1uF + 100k IN2b 7 10 8 9 (N.C.) 0.1uF + 0.1uF -4- 100uF 0.1uF + 10uF + IN4b IN3b + 0.1uF 4.7uF NJM2750 ■ TYPICAL CHARACTERISTICS Supply Current vs Supply Voltage Voltage Gain vs Frequency Response V+=9V Vin=1Vrms Ta=25°C Ach. 1 9 0.8 8 0.6 7 0.4 Voltage Gain [dB] Supply Current [mA] Ta=25°C 10 6 5 4 0.2 0 -0.2 3 -0.4 2 -0.6 1 -0.8 0 -1 0 5 10 15 10 10 100 100 Supply Voltage [V] Total Harmonic Distortion vs Input Voltage V+=9V Ta=25°C Ach. 1K 10K 1000 10000 Frequency [Hz] 100K 100000 Cross Talk vs Frequency Response 10 V+=9V Vin=1Vrms A-Weighted Ta=25°C Ach. 120 110 100 90 0.1 Cross Talk [dB] THD+N[％] 1 f=20Hz 80 70 60 50 40 f=20kHz 30 0.01 20 10 0 f=1kHz 0.001 -40 -30 -20 -10 Input Voltage [dBV] 0 10 10 10 100 100 1000 10000 1k 10k Frequency [Hz] 100000 100k Channel Separation vs Frequency Response V+=9V Vin=1Vrms A-Weighted Ta=25°C Ach.in Bch.out 120 110 Channel Separation [dB] 100 90 80 70 60 50 40 30 20 10 0 10 10 100 100 1000 10000 1k 10k Frequency [Hz] 100000 100k -5- NJM2750 ■ TYPICAL CHARACTERISTICS Voltage Gain vs Ambient Temperature Supply Current vs Ambient Temperature V+=9V 9 0.8 8 0.6 7 0.4 6 5 4 0.2 0 -0.2 3 -0.4 2 -0.6 1 -0.8 0 -100 -50 0 50 100 Ambient Temperature [°C] V+=9V Vin=1Vrms f=1kHz Ach. 1 Voltage Gain [dB] Supply Current [mA] 10 -1 -100 150 -50 0 50 100 Ambient Temperature [°C] 150 Output Noise Voltage vs Ambient Temperature Total Harmonic Distortion vs Ambient Temperature V+=9V Vin=1Vrms f=1kHz Ach. 1 V+=9V Rg=0ΩA-Weighted Ach. 0 Output Noise Voltage [dBV] Total Harmonic Distortion [%] -10 0.1 0.01 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 0.001 -100 -50 0 50 100 Ambient Temperature [°C] -120 -100 150 Maximum Output Voltage vs Ambient Temperature -50 0 50 100 Ambient Temperature [°C] 150 Cross Talk vs Ambient Temperature V+=9V f=1kHz at THD+N =1% Ach. 10 120 V+=9V Vin=1Vrms f=1kHz A-Weighted Ach. 100 9 90 Cross Talk [dB] Maximum Output Voltage [dBV] 110 8 80 70 60 50 40 7 30 20 10 6 -100 -6- -50 0 50 100 Ambient Temperature [°C] 150 0 -100 -50 0 50 100 Ambient Temperature [°C] 150 NJM2750 ■ TYPICAL CHARACTERISTICS Channel Separation vs Ambient Temperature V+=9V Vin=1Vrms f=1kHz A-Weighted Ach.in Bch.out 120 110 Channel Separation [dB] 100 90 80 70 60 50 40 30 20 10 0 -100 -50 0 50 100 Ambient Temperature [°C] 150 [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. -7-