NJM2755 4-Input / 1-Output Stereo Audio Selector ■ GENERAL DESCRIPTION The NJM2755 is 4 Input / 1 Output Stereo Audio Selector. The NJM2755 consists of switches and buffer operational amplifiers. Based on the internal switch op-amp technology, the NJM2755 features lower output noise, lower distortion and higher channel separation than the general Multiplexers or Analogue Switches. The NJM2755 contains compatibility with NJM2752(2in-1out SW),NJM2753(3in-1out SW). ■ PACKAGE OUTLINE NJM2755V ■APPLICATIONS ●LCD-TV/PDP-TV ●Car Stereo ●Any Audio System ■ FEATURES ● Operating Voltage 4.7 to 10V ● 4 Input / 1 Output Stereo Audio Selectors ● Low Output Noise -114dBV typ. ● Low Distortion 0.0009% typ. ● Bipolar Technology ● Package Outline SSOP16 ■ BLOCK DIAGRAM IN1A LOGIC IN1B IN2A CNT1 CNT2 OUTA IN2B IN3A OUTB IN3B V＋ ＋ IN4A IN4B Vref Vref GND Ver.1.1 -1- NJM2755 ■ PIN CONFIGURATIONS NJM2755 SSOP16 SSOP16 PIN.No. SYMBOL OUTA 2 IN1A 3 V+ 4 IN2A 5 CNT1 6 IN3A 7 CNT2 8 IN4A OUTB 16 IN1B 15 GND 14 IN2B 13 Vref 12 IN3B 11 N.C 10 IN4B 9 NJM2755V 1 FUNCTION PIN.No. SYMBOL FUNCTION 1 OUTA Ach Output Terminal 9 IN4B Bch Input Terminal4 2 IN1A Ach Input Terminal1 10 N.C No Connection 3 V+ Power Supply Terminal 11 IN3B Bch Input Terminal3 4 IN2A Ach Input Terminal2 12 Vref Reference Terminal 5 CNT1 Control Switch Terminal1 13 IN2B Bch Input Terminal2 6 IN3A Ach Input Terminal3 14 GND GND Terminal 7 CNT2 Control Switch Terminal2 15 IN1B Bch Input Terminal1 8 IN4A Ach Input Terminal4 16 OUTB Bch Output Terminal [Reference] The NJM2755 contains compatibility with NJM2752 (2in-1out SW),NJM2753 (3in-1out SW). -2- OUTA 2 IN1A 3 V+ 4 IN2A 5 CNT1 6 N.C 7 N.C NJM2752V 1 OUTB 14 1 OUTA IN1B 13 2 IN1A GND 12 3 V+ IN2B 11 4 IN2A Vref 10 5 CNT1 N.C 9 6 IN3A N.C 8 7 CNT2 NJM2753V NJM2753 NJM2752 OUTB 14 IN1B 13 GND 12 IN2B 11 Vref 10 IN3B 9 N.C 8 NJM2755 ■ ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL + Supply Voltage V Power Dissipation PD RATING UNIT 12 SSOP16 1) 490 2) 630 V NOTE 1): EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting 2): EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 4layer, FR-4) mounting mW Operating Temperature Range TOPR -40 to +85 °C Storage Temperature Range TSTR -40 to +150 °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 10 V - 10 15 mA - 4.5 - V GV Vin=1Vrms, f=1kHz -1 0 1 dB THD+N Vin=1Vrms, f=1kHz 6 (2.0) 0.0009 -114 (2) 8 (2.5) 0.03 -100 (10) % dBV (µVrms) dBV (Vrms) 85 100 - dB 90 110 - 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 - - 0.5 V Input Impedance RIN - 100 - kΩ ROUT - 45 - Ω Output Impedance 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 -3- NJM2755 ■ TERMINAL DESCRIPTION PIN No. 2 4 6 8 9 11 13 15 5 7 SYMBOL FUNCTION IN1A IN2A IN3A IN4A IN4B IN3B IN2B IN1B Ach Input Terminal1 Ach Input Terminal2 Ach Input Terminal3 Ach Input Terminal4 Bch Input Terminal4 Bch Input Terminal3 Bch Input Terminal2 Bch Input Terminal1 CNT1 CNT2 Control Switch Terminal1 Control Switch Terminal2 TERMINAL VOLTAGE EQUIVALENT CIRCUIT V+/2 650 100k 3p 0V (GND) CNT 650 100k 1 16 OUTA OUTB Ach Output Terminal Bch Output Terminal V+/2 OUTA OUTB 45 100k 12 Vref Reference Terminal V+/2 50k VREF 650 50k 3 14 V+ GND Power Supply Terminal GND Terminal V+ 0V V+ 12k GND -4- NJM2755 ■MEASUREMENT CIRCUIT 10µF + OUTB 16 IN1B 15 GND 14 IN2B 13 Vref 12 IN3B 11 CNT2 N.C 10 IN4A IN4B 9 1 OUTA 2 IN1A 3 V+ 4 IN2A 5 CNT1 6 IN3A 7 8 + + 100µF 10µF + 10µF + NJM2755 10µF 10µF 10µF + + + + 10µF 10µF 10µF 10µF 10µF + + + -5- NJM2755 ■APPLICATION CIRCUIT 10µF + 1 OUTA 2 IN1A 3 V+ 4 IN2A 5 CNT1 6 IN3A 7 CNT2 8 IN4A OUTB 16 IN1B 15 GND 14 IN2B 13 Vref 12 IN3B 11 N.C 10 IN4B 9 + + 100µF 10µF + 1µF 100k + 10µF 100k 1µF + 10µF NJM2755 10µF + 10µF + 10µF + 10µF + + + 10µF 10µF 10µF Application note: Resistor(100k) and capacitor(1µF) connected to CNT1 are added to reduce pop-noise. The value of input capacitor connected to IN1A and IN2A depends on cut-off frequency(calculated by fc=1/2πRC) you need. R(input impedance)=100kΩ. -6- NJM2755 !TYPICAL CHARACTERISTICS ICC vs Supply Voltage No signal VREF vs Supply Voltage No signal 14 7 12 6 10 5 8 4 VREF[V] ICC [mA] 25oC,105oC -40oC 6 3 4 2 2 1 0 -40 to 105oC 0 0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 Supply Voltage [V] Supply Voltage [V] GAIN vs FrequencyV=9V, I/O: INA1-Aout THD+N vs Input Voltage BW: 400-30kHz, f=1kHz, I/O: INA1-Aout 14 100 1 0.8 10 0.6 o -40 to 105 C -40oC 1 0.2 THD+N [%] Gain Output [dB] 0.4 0 -0.2 25oC 0.1 105oC 0.01 -0.4 -0.6 0.001 -0.8 -1 10 100 1000 10000 100000 0.0001 0.01 0.1 Frequency [Hz] 1 10 Input Voltage [Vrms] THD+N vs Frequency I/O: INA1-Aout Maximum Output Voltage vs Frequency V=9V, THD=1%, I/O: INA1-Aout 1 2.7 Maximum Output Voltage [Vrms] 2.65 THD+N [%] 0.1 -40 to 105oC 0.01 0.001 2.6 2.55 2.5 2.45 2.4 2.35 0.0001 2.3 10 100 1000 Frequency [Hz] 10000 100000 1 10 100 1000 10000 100000 Frequency [Hz] -7- NJM2755 !TYPICAL CHARACTERISTICS Maximum Output Voltage vs Supply Voltage THD=1%, I/O: INA1-1Aout Maximum Output Voltage vs Load Resistance V=9V, THD=1%, f=1kHz, I/O: INA1-Aout / INB1-Bout 3.0 4 2.5 Maximum Output Voltage [Vrms] Maximum Output Voltage [Vrms] 3.5 3 2.5 2 1.5 1 2.0 1.5 1.0 0.5 0.5 0 0.0 0 2 4 6 8 10 12 14 1 10 100 Supply Voltage [±V] Cross Talk vs Frequency V=9V, Vin=1Vrms, BW:10-80kHz, I/O: INA2-INA4/Aout, Select Channel:1ch -40 -60 Rg=3.3kΩ -70 100000 -50 Cross Talk[dB] Cross Talk[dB] -60 10000 Cross Talk vs Frequency V=9V, Vin=1Vrms, BW:10-80kHz, I/O: INA2-INA4/Aout, Select Channel:1ch -40 Rg=5.1kΩ -50 1000 RL[Ω] Rg=620Ω -80 105oC -70 25oC -80 -90 -40oC -90 -100 -100 Rg=0Ω -110 -110 10 100 1000 10000 100000 10 100 1000 Frequency [Hz] -50 Rg=5.1kΩ -60 Rg=3.3kΩ -70 Rg=620Ω -80 Rg=0Ω -90 -100 -60 -70 -40 to 105oC -80 -90 -100 -110 -110 10 100 1000 Frequency [Hz] -8- Channel Separation vs Frequency V=9V, Vin=1Vrms, BW:10-80kHz, I/O: INB1-Aout -40 Channel Separation[dB] Channel Separation[dB] -50 100000 Frequency [Hz] Channel Separation vs Frequency V=9V, Vin=1Vrms, BW:10-80kHz, I/O: INB1-Aout -40 10000 10000 100000 10 100 1000 Frequency [Hz] 10000 100000 NJM2755 !TYPICAL CHARACTERISTICS CNT Voltage vsCross Talk V=9V, Vin=1Vrms, A-w eghit I/O: IN2A-Aout 10 -40oC 25oC 10 105oC 0 -10 -10 -20 -20 -30 -30 -40 -40 Cross Talk[dB] Cross Talk[dB] 0 CNT Voltage vsCross Talk V=9V, Vin=1Vrms, A-w eghit I/O: IN1A-Aout -50 -60 -70 -80 25oC -40oC -50 -60 -70 -80 -90 -90 -100 -100 -110 -110 -120 -120 -130 105oC -130 1.5 1.7 1.9 2.1 CNT Voltage[V] 2.3 2.5 1 1.2 1.4 1.6 1.8 2 CNT Voltage[V] [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. -9-