AK4954A Datasheet | Asahi Kasei Microdevices

[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 petitive offerings. Features 1. Recording Function - Two Low Noise Microphone Power Supplies - Stereo Single-ended input with three Selectors - Low Noise Microphone Amplifier (+26d B/+20d B/+13d B/+6d B/0d B) - Digital ALC (Automatic Level Control) (Setting Range: +36d B ∼ - 52.5d B, 0.375d B Step) - ADC Performance: S/(N+D): 88d B, DR, S/N: 97d B (Microphone Amplifier =+20d B) S/(N+D): 88d B, DR, S/N: 100d B (Microphone Amplifier =0d B) - 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: +36d B ~ - 52.5d B, 0.375d B Step) - 3-band Dynamic Range Control Circuit - Digital Volume Control (+6d B ~ - 65.5d B, 0.5d B Step, Mute) - Capacitor-less Stereo Headphone Amplifier - HP-Amplifier Performance: S/(N+D): 65d B@20m W, S/N: 100d B - Output Power: 20m W@16Ω - Pop Noise Free at Power-ON/OFF - Mono Speaker-Amplifier (with Stereo Line Output Switch) - SPK-Amplifier Performance: S/(N+D): 70d B@250m W Output Noise Level: -97d BV - BTL Output - Output Power: 400m W@8Ω (SVDD=3.3V) 100m W@8Ω (SVDD=1.5V) - Beep Generator 3. Power...