AK4953A Datasheet, PDF (1/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
AK4953A
24bit Stereo CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4953A is a low power consumption 24bit stereo CODEC with a microphone, headphone and
speaker amplifiers. The input circuits include a microphone amplifier 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
AK4953A is available in a small 36pin QFN (5x5mm 0.4mm pitch), utilizing less board space than
competitive offerings.
FEATURES
1. Recording Function
• Stereo Single-ended input with three Selectors
• MIC Amplifier (+29dB/+26dB/+23dB/+20dB/+16dB/+12dB/0dB)
• Digital ALC (Automatic Level Control)
(Setting Range: +36dB ∼ −54dB, 0.375dB Step)
• ADC Performance: S/(N+D): 82dB, DR, S/N: 88dB (MIC-Amp=+20dB)
S/(N+D): 85dB, DR, S/N: 96dB (MIC-Amp=0dB)
• Wind-noise Reduction Filter
• 5 Band Notch Filter
• Digital MIC Interface
2. Playback Function
• Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)
• Digital ALC (Automatic Level Control)
(Setting Range: +36dB ~ −54dB, 0.375dB Step)
• Digital Volume Control (+12dB ~ −115dB, 0.5dB Step, Mute)
• Capacitor-less Stereo Headphone Amplifier
- HP-Amp Performance: S/(N+D): 80dB@24mW, S/N: 96dB
- Output Power: 24mW@16Ω
- Pop Noise Free at Power-ON/OFF
• Mono Speaker-Amplifier
- SPK-Amp Performance: S/(N+D): 70dB@250mW, S/N: 95dB
- BTL Output
- Output Power: 400mW@8Ω (SVDD=3.3V)
100mW@8Ω (SVDD=1.5V)
• Beep Generator
3. Power Management
4. Master Clock:
(1) PLL Mode
• Frequencies: 11.2896MHz, 12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
32fs or 64fs (BICK pin)
(2) External Clock Mode
• Frequencies: 256fs, 384fs, 512fs or 1024fs (MCKI pin)
MS1252-E-00
-1-
2010/10