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AK4954A

AKM
Part Number AK4954A
Manufacturer AKM
Description 32bit Stereo CODEC
Published May 11, 2014
Detailed Description [AK4954A] AK4954A 32-bit Stereo CODEC with MIC/HP/SPK-AMP GENERAL DESCRIPTION The AK4954A is a low power consumption 32...
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AK4954A
AK4954A

Overview
[AK4954A] AK4954A 32-bit Stereo CODEC with MIC/HP/SPK-AMP GENERAL DESCRIPTION The AK4954A is a low power consumption 32-bit stereo CODEC with a microphone, a headphone and a speaker amplifiers.
The input circuits include a microphone amplif ier and an ALC (Automatic Level Control) circuit, and the output circuits include a cap-less headphone amplifier and a speaker amplifier.
It is suitable for portable application with recording/playback function.
The integrated charge pump circuit generates a negative voltage and removes the output AC coupling capacitors.
The speaker amplifier has a wide operating voltage range, which is from 0.
9V to 5.
5V, enabling a direct drive to batteries.
The AK4954A is available in a small 32-pin QFN (4x4mm 0.
4mm pitch), utiliz ing less board space than competitive offerings.
FEATURES 1.
Recording Function • Two Low Noise Microphone Power Supplies • Stereo Single-ended input with three Selectors • Low Noise Microphone Amplifier (+26dB/+20dB/+13dB/+6dB/0dB) • Digital ALC (Automatic Level Control) (Setting Range: +36dB ∼ −52.
5dB, 0.
375dB Step) • ADC Performance: S/(N+D): 88dB, DR, S/N: 97dB (Microphone Amplifier =+20dB) S/(N+D): 88dB, DR, S/N: 100dB (Microphone Amplifier =0dB) • Two Types of Decimation Filters • Overflow Detection • Wind-noise Reduction Filter • Stereo Separation Emphasis Circuit • 5-band Notch Filter • Digital Microphone Interface 2.
Playback Function • Digital ALC (Automatic Level Control) (Setting Range: +36dB ~ −52.
5dB, 0.
375dB Step) • 3-band Dynamic Range Control Circuit • Digital Volume Control (+6dB ~ −65.
5dB, 0.
5dB Step, Mute) • Capacitor-less Stereo Headphone Amplifier - HP-Amplifier Performance: S/(N+D): 65dB@20mW, S/N: 100dB - Output Power: 20mW@16Ω - Pop Noise Free at Power-ON/OFF • Mono Speaker-Amplifier (with Stereo Line Output Switch) - SPK-Amplifier Performance: S/(N+D): 70dB@250mW Output Noise Level: -97dBV - BTL Output - Output Power: 400mW@8Ω (SVDD=3.
3V) 100mW@8Ω (SVDD=1.
5V) • Beep Generator 3.
Power Manage...


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