NJU8725 Datasheet | New Japan Radio

PRELIMINARY CLASS D AMPLIFIER FOR DIGITAL AUDIO ! GENERAL DESCRIPTION The NJU8725 is an 800m W-output class D th Amplifier featuring 6 ∆Σ modulation. It includes Digital Attenuator, Mute, and De-emphasis circuits. It converts Digital source input to PWM signal output which is output PWM signal converted to analog signal with simple external LC Filter. The NJU8725 realizes very high power-efficiency by class D operation. Therefore, it is suitable for battery-powered applications and others. ! PACKAGE OUTLINE NJU8725V ! Features # # # # # # # # # # # # # ! PIN CONFIGURATION 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 F0/DATA F1/REQ F2/SCK DIN VDDR OUTRP VSSR OUTRN VDDR LRCK BCK MCK Stereo BTL Power Amplifier Sixth-order 32f S Over Sampling ∆Σ & PWM VDD Internal 8f S Over Sampling Digital Filter STBY Sampling Frequency : 96k Hz (Max.) TEST De-Emphasis : 32k Hz, 44.1k Hz, 48k Hz MUTE System Clock : 256f S VDDL Digital Processing : Attenuator 107step, LOG Curve : Mute OUTLP Digital Audio Interface : 16bit, 18bit VSSL 2 : I S, LSB Justified, MSB Justified OUTLN Short Circuit Protection VDDL Operating Voltage : 3.0 to 3.6V Driving Voltage : VDD to 5.25V MODE C-MOS Technology RST Package Outline : SSOP24 VSS ! BLOCK DIAGRAM VDD VSS RST MCK LRCK BCK DIN MUTE STBY MODE F0/DATA F1/REQ F2/SCK Serial Audio Data Interface 8f S Over Sampling Digital Filter 32f S 6 ∆Σ & PWM th Power On Reset Circuit Synchronization Circuit Short Circuit Protection VDDL OUTLP VSSL VDDL OUTLN VSSL VDDR OUTRP System Control VSSR VDDR OUTRN VSSR -1- ! TERMINAL DESCRIPTION No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 SYMBOL VDD STBY TEST MUTE VDDL OUTLP VSSL OUTLN VDDL MODE RST VSS MCK BCK LRCK VDDR OUTRN VSSR OUTRP VDDR DIN F2/SCK I/O - I I I - O - O - I I - I I I - O - O - I I FUNCTION Logic Power Supply, VDD=3.3V Standby Control Terminal Low : Standby ON High : Standby OFF Manufacturer Testing Terminal Normally connect to GND. Mute Control...