AK4679EG Datasheet, PDF (1/220 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with DSP and MIC/RCV/HP/SPK/LINE-AMP

[AK4679]
AK4679
24bit Stereo CODEC with DSP and MIC/RCV/HP/SPK/LINE-AMP
GENERAL DESCRIPTION
The AK4679 is a 24bit stereo CODEC and a built-in Microphone-Amplifier, Receiver-Amplifier, Mono
Class-D Speaker-Amplifier, Cap-less Class-G Headphone-Amplifier and Line-Amplifier as well as
HF/Audio DSP. The AK4679 features AKM DSP core to deal with hands free function for wide band and
dual PCM I/F in addition to audio I/F that allows easy interfacing in mobile phone designs with Bluetooth
I/F. The playback features also include 5-band Parametric EQ and Dynamic Range Control; therefore the
AK4679 can automatically adjust the volume to a comfortable level that has no distortion and provides
great flexibility. The AK4679 is available in a 78pin BGA, utilizing less board space than competitive
offerings.
FEATURES
‹ CODEC&Amp block
1. Recording Function (Stereo CODEC)
• 4 Stereo Input Selectors
• 4 Stereo Inputs (Single-ended) or 3 Mono Input (Full-differential)
• MIC Amplifier: +24dB ~ −6dB, 3dB step
• 2 Output MIC Power Supplies
• Digital ALC (Automatic Level Control): +36dB ~ −54dB, 0.375dB Step, Mute
• ADC CHARACTERISTICS: S/(N+D): 80dB, DR, S/N: 87dB (MIC-Amp=+18dB)
S/(N+D): 80dB, DR, S/N: 92dB (MIC-Amp=0dB)
• Stereo Digital MIC Interface
• Wind-noise Reduction Filter
• Stereo Separation Emphasis
• 3-band Programmable Notch Filter
• Audio Interface Format: 24/16bit MSB justified, 24/16bit I²S, 16bit DSP Mode
2. Playback Function (Stereo CODEC)
• Digital Volume (+6dB ~ −57.0dB, 0.5dB Step, Mute)
• Digital ALC (Automatic Level Control): +36dB ~ −54dB, 0.375dB Step, Mute
• Stereo Separation Emphasis
• Dynamic Range Control
• 5-band Parametric Equalizer
• Stereo Line Output (Selectable Full-differential / Single-ended)
• Mono Receiver-Amp
- BTL Output
- Output Power: 60mW @ 32Ω
- Analog Volume: +12 ~ −30dB & Mute, 3dB Step
• Cap-less Stereo Class-G Headphone-Amp
- Output Power: 25mW @ 32Ω, 45mW @ 16Ω
- Analog Volume: +6 ~ −62dB & Mute, 2dB Step
- Zero crossing Detection
- Pop Noise Free at Power-ON/OFF
• Mono Class-D Speaker-Amp
- BTL Output
- Short Protection Circuit
- Output Power: 1.1W @ 8Ω, SVDD=4.2V, THD+N = 10%
0.89W @ 8Ω, SVDD=4.2V, THD+N = 1%
- Analog Volume: +12 ~ −30dB & Mute, 3dB Step
- Pop Noise Free at Power-ON/OFF
• Audio Interface Format:
- 24/16bit MSB justified, 16bit LSB justified, 16/24bit I²S, 16bit DSP Mode
MS1402-E-06
-1-
2013/02