ESMT AD8356A 2.1-Channel Digital Audio Amplifier with Headphone Driver Over-temperature protection Under-voltage shutdown Short-circuit protection I2C control interface Features 2 16/18/20/24-bit input with I S, Left-alignment and Right-alignment data format PSNR & DR(A-weighting) Loudspeaker: 93dB (PSNR), 98dB (DR) Headphone: 87dB (PSNR), 91dB (DR) Multiple sampling frequencies (Fs) 32kHz / 44.1kHz / 48kHz and 64kHz / 88.2kHz / 96kHz System clock = 64x, 128x, 192x, 256x, 384x, 512x, 576x, 768x, 1024x Fs Supply voltage 3.0~12V for loudspeaker driver 3.0~3.3V for others 2.5~5.5V tolerant input interface Loudspeaker output power ( @10% THD+N) 2×8.7W(Full,8Ω)+16.7W(Full, 4Ω) for 2.1-channel 2×4.3W(Half,4Ω)+16.7W(Full, 4Ω) for 2.1-channel 2×8.7W(Full,8Ω) for stereo 2×4.3W(Half,4Ω) for stereo 2×16.7W(Full, 4Ω) for stereo Headphone power 34mW into 32Ω@1kHz and 1% THD+N 65mW into 16Ω@1kHz and 1% THD+N 110mW into 8Ω@1kHz and 1% THD+N 200mW into 4Ω@1kHz and 1% THD+N Sound processing including： Bass (+18dB~-12dB, 3dB frequency is 250Hz), Treble (+18dB~-12dB, 3dB frequency is 7kHz), 5 bands parametric EQ, Volume control (+24dB~-103dB, 1dB/step) and Dynamic range control Anti-pop design Applications CD and DVD TV audio Car audio Boom-box MP3 docking systems Portable / Handheld Powered speaker Wireless audio USB speaker Description This is a 2.1-channel fully digital audio amplifier with output power which can deliver up to 2×8.7W to 8Ω load for L,R channel and 16.7W to 4Ω load for sub-woofer channel simultaneously with 12V supply voltage. Using I2C digital control interface, AD8356A provides sound processing includes Volume, Bass, Treble, EQ, Mixing and Dynamic Range Control (DRC). Users can use one AD8356A for stereo or 2.1-channel, two for 5.1-channel and three for 7.1-channel, respectively ORDERING INFORMATION Product Number Package Comments AD8356A-KG 7x7 48L QFN Pb-free Reset HPSPK PD I2C Control Interface MCLK SA1 SA0 SCL SDA M0 M1 Functional Block Diagram PLL BCLK SDATA0 SDATA1 SDATA2 LRCIN Input Interface PLL_Byp Audio Signal Processing Elite Semiconductor Memory Technology Inc. HPL Headphone Driver or HPR Internal System Clock Protection Circuits PCM to PWM Loudspeaker Driver ERROR L Subwoofer R Publication Date : Nov. 2005 Revision : 1.0 1/3 ESMT AD8356A HP-SPK 37 VDDRB 38 RB 39 GNDR 40 RA 41 VDDRA 42 VDDLA 43 LA 44 GNDL 45 LB 46 VDDLB 47 PLL_Byp 48 Pin Assignment MCLK 1 36 HPL PLLGND 2 35 HPR PLLVDD 3 34 AGND CLK_OUT 4 33 AVDD 32 PWMSA DVDD 5 M0 6 31 DEF DGND 7 30 SDA M1 8 SDATA0 9 29 SCL SDATA1 10 27 SA0 SDATA2 11 26 ERROR 28 SA1 25 PD LRCIN 12 24 Reset 23 VDDSRB 22 SRB 21 GNDSR 20 SRA 19 VDDSRA 18 VDDSLA 17 SLA 16 GNDSL 15 SLB 14 VDDSLB 13 BCLK Pin Description PIN NAME TYPE DESCRIPTION CHARACTERISTICS 1 MCLK I Master clock input 5V tolerant Schmitt trigger TTL input buffer 2 PLLGND P Ground for PLL 3 PLLVDD P Supply for PLL (Note1) 4 CLK_OUT O PLL output 5V tolerant TTL output buffer 5 DVDD P Digital Power (Note1) 6 M0 I Mode selection 0 5V tolerant Schmitt trigger TTL input buffer 7 DGND P Digital Ground 8 M1 I Mode selection 1 5V tolerant Schmitt trigger TTL input buffer 9 SDATA0 I Serial audio data input 0 5V tolerant Schmitt trigger TTL input buffer 10 SDATA1 I Serial audio data input 1 5V tolerant Schmitt trigger TTL input buffer 11 SDATA2 I Serial audio data input 2 5V tolerant Schmitt trigger TTL input buffer 12 LRCIN I Left/Right clock input (Fs) 5V tolerant Schmitt trigger TTL input buffer 13 BCLK I Bit clock input (64Fs) 5V tolerant Schmitt trigger TTL input buffer 14 VDDSLB P Supply for subwoofer-left channel B (Note2) 15 SLB O Subwoofer-left channel output (-) 16 GNDSL P Ground for subwoofer-left channel 17 SLA O Subwoofer-left channel output (+) 18 VDDSLA P Supply for subwoofer-left channel A (Note2) 19 VDDSRA P Supply for subwoofer-right channel A (Note2) 20 SRA O Subwoofer-right channel output (+) 21 GNDSR P Ground for subwoofer-right channel 22 SRB O Subwoofer-right channel output (-) Elite Semiconductor Memory Technology Inc. Publication Date : Nov. 2005 Revision : 1.0 2/3 ESMT AD8356A 23 VDDSRB P Supply for subwoofer-right channel B (Note2) 24 Reset I Reset, low active 5V tolerant Schmitt trigger TTL input buffer 25 PD I Power down, low active 5V tolerant Schmitt trigger TTL input buffer 26 ERROR O ERROR output Open-drain output 2 27 SA0 I I C select address 0 5V tolerant Schmitt trigger TTL input buffer 28 SA1 I I2C select address 1 5V tolerant Schmitt trigger TTL input buffer 2 29 SCL I I C serial clock input 5V tolerant Schmitt trigger TTL input buffer 30 SDA I I2C serial data input 31 DEF I Default volume, 0=Mute, 1=Un-Mute 5V tolerant Schmitt trigger TTL input buffer 32 PWMSA O Half-bridge, sub-woofer channel output 5V tolerant TTL output buffer 33 AVDD P Analog supply (Note1) 34 AGND P Analog ground 35 HPR O Headphone right channel output 36 HPL O Headphone left channel output 37 HP-SPK I Headphone detection 38 VDDRB P Supply for right channel B 39 RB O Right channel output (-) 40 GNDR P Ground for Right channel 41 RA O Right channel output (+) 42 VDDRA P Supply for right channel A (Note2) 43 VDDLA P Supply for left channel A (Note2) 44 LA O Left channel output (+) 45 GNDL P Ground for left channel 46 LB O Left channel output (-) 47 VDDLB P Supply for left channel B (Note2) 48 PLL_Byp I PLL Bypass 5V tolerant Schmitt trigger TTL input buffer 5V tolerant Schmitt trigger TTL input buffer with open-drain output (Note2) Note1：These pins provide the supply for digital PWM controller, headphone drivers, built-in PLL and protection circuits except for loudspeaker short-circuit protection circuits. Note2：These pins provide the supply for loudspeaker driver stages, which are known as “PVDD” Available Package Package Type Device No. θja(℃/W) Ψjt(℃/W) θjc(℃/W) Exposed Thermal Pad 7x7 48L QFN AD8356A 23.5 1.6 12.5 Yes (Note3) Note3：The thermal pad is at the bottom for QFN package. To optimize the performance of thermal dissipation, solder the thermal pad to PCB’s ground plane is suggested. Elite Semiconductor Memory Technology Inc. Publication Date : Nov. 2005 Revision : 1.0 3/3