NJM2705

NJM2705 Surround Audio Processor for Mobile Applications s GENERAL DESCRIPTION The NJM2705 is the surround audio processor for mobile applications. It regenerates the 3D surround sound with extremely narrow space two speakers (2SP mode), headphone surround with normal headphone (HP mode) and reverberation sound with only one speaker (1SP mode). It includes mode control switches for surround function and standby function and realizes low consumption power design by standby function. In addition to SSOP16, ultra small and thin packages FFP16 (Flip-Chip Fine Package) and PCSP16 (Plastic Chip Size Package) is applied. It is suitable for cellular phone, PDA and portable game. s PACKAGE OUTLINE NJM2705PB1 NJM2705SD3 NJM2705V s FEATURES q Operating Voltage q Operating Current 1.8 to 6V 0.7mA typ. at Active mode 1µA max. at Standby mode q Low Output Noise 10µVrms typ (2SP/HP/1SP mode, VR : max.) q Variable Surround Effect by external resistor (Adjustable for speaker and headphone independently.) q Standby Function q Internal Mode Control Switch q Bipolar Technology q Package Outline FFP16, PCSP16, SSOP16 s BLOCK DIAGRAM LOUT LIN 3D Filter 1SP Surround ROUT 3D Enhancer RIN Bypass mode 2SP mode Surround mode HP mode 1SP mode -1- NJM2705 s PIN CONFIGURATION FFP16 (Top View) 12 11 10 13 14 15 16 1 PCSP16 (Top View) 9 8 7 6 5 1. 2. 3. 4. 5. 6. 7. 8. LIN RIN LOUT ROUT NFSPR NFHPR NFSPL NFHPL 9. LMON 10. PS 11. SW2 12. SW1 13. STBY 14. V+ 15. GND 16. VREF 2 3 4 12 11 10 9...