NJU7392 2ch Pushbutton Interface EVR with eala Stereo Expander ■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE The NJU7392 is a 2-channel electronic volume which include a Volume control, 2-in stereo input selector (with 1 x Differential input), eala Stereo Expander control (Stereo enhancement for narrow speakers), Bass boost control with ALC feature and a Stand-by function (Power-saving mode). The NJU7392 has also built-in push button interface for its volume, Bass Boost and eala Stereo Expander controls - making application possible without the use of micro-controller. The NJU7392 is suitable for low power application and also for application with narrow speaker such as mobile audio player and cradle speaker for mobile game. ■ FEATURES • Operating Voltage • Low operating current +2.7 to +5.5V 5mA typ. (Active mode) 1µA typ. (stand-by mode) • Low output noise 20µVrms typ. (eala Stereo Expander : ON) • Input Selector 2ch (single-end / quasi-differential) • Sound Space adjustment for narrow speaker • Pushbutton interface EVR 0 to -68dB, MUTE • Bass Boost with ALC • CMOS Technology • Package Outline SSOP32 ■ BLOCK DIAGRAM V+ V+ Power Indicator V+ V+ Expander Indicator Bass Indicator Power Button Input 1L Output L Diff Input 1R eala Stereo Expander Input Selector Input 2L P-VOL Bass Boost with Limitter Output R Input 2R V+ V+ V+ V+ V+ Expander Button Down Up Bass Button Input1/Input2 for palmtop NJU7392 Ver.1.5 E_DS for laptop –1– NJU7392 ■ ABSOLUTE MAXIMUM RATING (Ta=25°C) PARAMETER SYMBOL RATING UNIT +7 V + Power Supply Voltage V Power Dissipation 1) 950* PD Maximum Input Voltage VIMAX Operating Temperature Range 0~V * Tstg V -40 ~ +85 o C -40 ~ +125 o C Topr Storage Temperature Range mW + 2) 1) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting 2) * Don’t apply the input voltage that exceeds supply voltage. ■ ELECTRICAL RECOMMENDED OPERATING CONDITION (Ta=25°C) * PARAMETER Operating Voltage SYMBOL V TEST CONDITION MIN. TYP. MAX. UNIT - 2.7 3.3 5.5 V MIN. TYP. MAX. UNIT + ■ ELECTRICAL CHARACTERISTICS ●DC CHARACTERISTICS (Ta=25°C, V+=3.3V, unless otherwise specified) PARAMETER Operating Current Reference Voltage SYMBOL TEST CONDITION IDD1 No Signal, Active - 5.0 8.0 mA IDD2 No Signal, Standby - 0.1 1.0 µA VREF No signal 1.5 1.65 1.8 V ●AC CHARACTERISTICS + (Ta=25°C, V =3.3V, VIN=500mVrms, f=1kHz, Expander: OFF, Treble:0dB, Bass Boost: OFF, VOL:0dB, unless otherwise specified) TEST CONDITION PARAMETER SYMBOL Maximum Input Voltage 1 VIM1 Maximum Input Voltage 2 VIM2 Maximum Input Voltage 3 VIM3 Output Noise Voltage 1 VNO1 IN L R VIN - L BW=400Hz-30kHz - VIN R Expander: Palmtop THD=1%, BW=400Hz-30kHz Expander: Palmtop Bass: ON, f=1kHz THD=1%, BW=400Hz-30kHz VIN 0 L 0 VIN R VIN VIN L VIN VIN R Rg=0Ω, A-weighted 0 0 L 0 0 R Rg=0Ω, A-weighted 0 0 L VOL=-68dB 0 0 R Expander: Palmtop 0 0 L Rg=0Ω, A-weighted 0 0 R 0 0 L 0 0 R VIN - L - VIN R Expander: Palmtop VIN 0 L BW=400Hz-30kHz 0 VIN R Expander: Palmtop Bass: ON BW=400Hz-30kHz VIN 0 L 0 VIN R THD=1% Output Noise Voltage 2 VNO2 Output Noise Voltage 3 VNO3 Output Noise Voltage 4 VNO4 Expander: Palmtop Bass: ON, Rg=0Ω, A-weighted Total Harmonic Distortion 1 THD+N1 BW=400Hz-30kHz Total Harmonic Distortion 2 THD+N3 Total Harmonic Distortion 3 THD+N3 –2– OUT MIN. TYP. MAX. UNIT 550 580 - mVrms 550 580 - mVrms 550 580 - mVrms - -100 (10) -94 (20) dBV (µVrms) - -100 (10) -94 (20) dBV (µVrms) - -90 (32) -80 (100) dBV (µVrms) - -90 (32) -80 (100) dBV (µVrms) - 0.05 0.1 % - 0.1 0.5 % - 0.1 0.5 % NJU7392 Ver.1.5_E_DS NJU7392 TEST CONDITION PARAMETER SYMBOL IN L VIN - L - VIN R VIN - L - VIN R Expander: Laptop VIN VIN L f=10kHz VIN VIN R Expander: Palmtop VIN VIN L f=10kHz VIN VIN R VIN 0 L 0 VIN R VIN 0 L 0 VIN R Bass: ON VIN=100mVrms f=100Hz VIN VIN L VIN VIN R VOL=-68dB VIN - L - VIN R Bypass Gain GVBYP Treble=0dB Treble Gain GVTRE f=10kHz Expander Gain 1 GVEXP1 Expander Gain 2 GVEXP2 Expander Gain 3 GVEXP3 Expander: Laptop Expander Gain 4 GVEXP4 Expander: Palmtop Bass Gain GVBASS Maximum Attenuate level GVVOL-68 Mute Level Mute Channel Balance GCB Bass Limit Level VLIM Cross Talk CT Channel Separation CS R OUT BW=400Hz-30kHz VIN - L - VIN R VIN - L - VIN R Bass: ON VIN VIN L f=100Hz Selected Input: No Signal, Rg=0Ω BW=400Hz-30kHz VIN VIN R VIN - L - VIN R 0 VIN L VIN 0 R VOL=Mute BW=400Hz-30kHz VIN=0.7Vrms Rg=0Ω BW=400Hz-30kHz MIN. TYP. MAX. UNIT -1.0 0.0 1.0 dB 2.0 3.0 4.0 dB 1.7 3.7 5.7 dB 3.0 5.0 7.0 dB 2.1 4.1 6.1 dB 3.3 5.3 7.3 dB 4.0 6.0 8.0 dB -70 -68 -66 dB - -90 -86 dB -1.0 0.0 1.0 dB 0.75 1.0 1.25 Vrms 70 80 - dB 70 80 - dB MIN. TYP. MAX. UNIT ● Indicator Output Block (Ta=25°C, V+=3.3V, unless otherwise specified) PARAMETER High Input Voltage Low Input Voltage SYMBOL VOH VOL TEST CONDITION ISOURCE=1mA (pin 17, pin 18, pin 19) ISINK=1mA (pin 17, pin 18, pin 19) + V *0.8 0 - + V + V *0.2 V 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. NJU7392 Ver.1.5_E_DS –3–