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| NJW1200 Low-Voltage 2-channel Electronic Volume with ealaBASS !GENERAL DESCRIPTION The NJW1200 is a low-voltage 2-channel Electronic Volume with ealaBASS. It includes main volume, 2 stereo inputs selector (Differential Input), 2nd Order HPF. And It performs NJRC original dynamic bass boost technology "ealaBASS" provides graceful bass sound with low distortion. The NJW1200 performs low noise and low distortion characteristics with resistance ladder type electrical volume. The NJW1200 operates on low supply voltage. And It includes power save function. Therefore, it is suitable for low voltage supply portable systems. 2 All of internal status and variables are controlled by I C BUS interface. !FEATURES !PACKAGE OUTLINE NJW1200V Operating Voltage 2.7 to 5.5V Low Consumption 3mA typ. Power Save Function 120A typ. I2C BUS Interface ealaBASS (Dynamic Bass Boost) eala (Surround Sound for stereo source) & eala MONO (Surround Sound for monaural source) Low Output Noise -100dBV typ. Low Distortion 0.07% typ. Main Volume 0 to -78dB / 2dB step, Mute 2 stereo Inputs Selector (Differential Input) 2nd Order HPF Bi-CMOS Technology Package Outline SSOP32 !BLOCK DIAGRAM SELOUTa EVROUTa OUTa AUX Control Differential Input stage IN1a SDA DIFFGND1 HPF I2CBus Interface IN1b EVR SCL IN2a eala/ ealaBass DIFFGND2 HPF Bias IN2b Input selector EVR SELOUTb EVROUTb OUTb -1- NJW1200 ! Application Circuit C1 4.7F IN2a R1 51k DIFFGND2 R2 51k IN2b C3 4.7F 3 IN2b IN1b 30 C2 4.7F 2 DFFGND2 DIFFGND1 31 C23 4.7F R6 51k IN1b 1 IN2a IN1a 32 C24 4.7F R7 51k DIFFGND1 C25 4.7F IN1a SELOUTa C5 0.47F 4 SELOUTa NJW1200 SELOUTb 29 C21 0.47F SELOUTb 5 EVRINa EVRINb 28 6 C6 150nF R8 12k 7 C7 150nF 8 C26 10F R9 39k 9 C8 1nF EVROUTa EVROUTb 27 R11 12k 26 C19 150nF C20 150nF HPF1a HPF1b HPF2a HPF2b 25 R10 39k C27 10F C18 1nF 24 HBSTa ealaBass LPF1 ealaBass INT OUTa HBSTb ealaBass LPF3 ealaBass LPF2 OUTb eala Filter C9 470nF 10 23 C17 82nF 22 C10 1F 11 OUTa 12 21 C15 10nF 20 C14 1F OUTb 13 AUX SDA 14 SDA SURTC 19 SCL 15 SCL C13 1F VREF 18 16 GND V+ 17 C12 1F V+ V pullup ( 1.5V to V +) Power save Control Headphone Driver (NJM2776) Headphone OUTa 330 uF 1 10 330uF Headphone OUTb 10ohm 0.22uF 2 0.22uF 10ohm 0.47uF 0.33 uF 4 3 9 0.47uF 8 7 22uF VCC 22uF 5 6 [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. -2- |
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