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Wednesday, September 17, 2008
AKM Semiconductor AK4373: Audio DAC integrates speaker and headphone amplifiers
Sep 17 2008 2:15PM | Permalink | Email this | Comments (0) |
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Integrating speaker and headphone amplifiers, the AK4373 24-bit stereo DAC eliminates the need for large capacitors for ac coupling. The headphone amplifier operates in differential or single-ended mode and provides output power of 90 mW into 8Ω. The mono-bridge-tied-load speaker amplifier drives 800 mW into 8Ω. The device consumes 7 mW in playback mode. DSP functions include highpass and lowpass filters, stereo separation, five-band equalization, and automatic level control. Features include a power-supply-management function, allowing block-by-block control of circuits, using a three-wire or an I2C microcontroller interface for control. The operating-voltage ranges from 2.2 to 3.6V in analog cores, 2.2 to 4V for the headphone/speaker amplifier, and 1.6 to 3.6V for digital interfaces. Available in a 5×5-mm QFN-33 package, the AK4373 stereo DAC costs $1.14 (10,000).
AKM Semiconductor, www.akm.com
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