[AK4675]
AK4675
Stereo CODEC with MIC/RCV/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4675 is a stereo CODEC with a built-in Microphone-Amplifier, Receiver-Amplifier, cap-less
Headphone-Amplifier and stereo audio class-D Speaker-Amplifier. The AK4675 features dual PCM I/F in
addition to audio I/F that allows easy interfacing in mobile phone designs with Bluetooth I/F. The
Speaker-Amplifier includes ALC (Automatic Level Control) circuit what is able to stabilize each output
sound levels. The AK4675 is available in an 83pin BGA, utilizing less board space than competitive
offerings.
FEATURES
1. Recording Function (Stereo CODEC)
•
4 Stereo Input Selector x 2ch
•
4 Stereo Inputs (Single-ended) or 2 Stereo Input (Full-differential)
•
MIC Amplifier: +30dB
∼ −12dB,
3dB step
•
Digital ALC (Automatic Level Control): +36dB
∼ −54dB,
0.375dB Step, Mute
•
Wind-noise Reduction Filter
•
Stereo Separation Emphasis
•
5-band Programmable Notch Filter
•
Audio Interface Format: 16bit MSB justified, I
2
S, DSP Mode
2. Playback Function (Stereo CODEC)
•
Digital Volume (+12dB
∼ −115.0dB,
0.5dB Step, Mute)
•
Digital ALC (Automatic Level Control): +36dB
∼ −54dB,
0.375dB Step, Mute
•
Stereo Separation Emphasis
•
5-band EQ
•
Stereo Line Output
•
Mono Receiver-Amp
- BTL Output
- Output Power: 30mW@32Ω (AVDD=3.3V)
•
Stereo Cap-less Headphone Amplifier
- Mono / Stereo Mode
- Output Power: 64mW x 2ch @ 16Ω, SVDDA=3.3V, THD+N = –40dB
- THD+N: -58dB @ 16Ω, Po=30mW, SVDDA=3.3V
- Output Noise Level: 24μVrms
- Outputs Volume: +12dB to –50dB, 2dB Step
- Pop Noise Free at Power-ON/OFF and Mute
•
Class-D Speaker Amplifier
- BTL output
- Output Power: 1.6W @ 8Ω, SVDDA=5.0V
0.8W @ 8Ω, SVDDA=3.6V
- THD+N: –65dB @8Ω, Po=0.25W, SVDDA=3.6V
- Output Noise Level: 71μVrms
- ALC (Automatic Level Control) Circuit
- Pop Noise Free at Power-ON/OFF and Mute
- External filter-less
- Short Protection circuit
•
Thermal Shutdown / Short protection circuit
•
Analog Mixing: 4 Stereo Input
•
Audio Interface Format: 16bit MSB justified, 16bit LSB justified, 16-24bit I
2
S, DSP
Mode
3. Dual PCM I/F for Baseband & Bluetooth Interface
MS0963-E-00
-1-
2008/05
AKM [ ASAHI KASEI MICROSYSTEMS ]
