LM48824TM

• Product Introduction

 peculiarity   G-class power saving Grounding reference headphone output - no output coupling capacitors required Common mode detection i 2C quantity and mode control High output impedance shutdown Differential input Advanced click and pop suppression Low supply current Low total harmonic distortion mode option   illustrate LM48824 is a Class G, ground-referenced stereo headphone amplifier designed for portable devices. LM48824 the grounding reference architecture of the functional state, thus eliminating the capacitors required for large DC partitions in traditional headphone amplifiers, saving board space, and minimizing system costs. LM48824 need the national patent pending Class G to provide power savings over traditional Class AB headphone amplifier architectures. In addition, output noise improves common-mode detection, corrects any divergence between amplifier ground and potential headphone return terminals to reduce noise generated by any justification mismatch. The high output impedance mode allows the LM48824's output to be driven by an external source without degrading the signal. Other features include flexible power requirements, differential inputs for improved noise suppression, a low-power (2.5μA) shutdown mode, and a 32-step 2C volume control mute function. LM48824's superior click suppression eliminates transient noise heard when power-up/down and off. LM48824 in an ultra-small 16-bump, 0.4mm pitch micro SMD package (1.69 mm x 1.69 mm) Key specifications: ■ Quiescent power supply current is 3.6V 0.9 mAh (typical) ■ Output power at V DD = 3.6V / channel R L = 16Ω, THD + N ≤1% 37mW (typical) ■ Output power at V DD = 3.6V / channel R L = 32Ω, THD + N ≤1% 29mW (typical) ■ PSRR at 217Hz 100 dB (typical) ■ Shut off the current 2.5μA (typical)

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• 移动电话，PDA，MP3播放器
• 便携式电子设备，笔记本电脑