[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 I
2
S, 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 I
2
S, 16bit DSP Mode
MS1402-E-06
-1-
2013/02
AKM [ ASAHI KASEI MICROSYSTEMS ]
