Stereo CODEC. AK4678 Datasheet

AK4678 CODEC. Datasheet pdf. Equivalent

AK4678 Datasheet
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Part AK4678
Description Stereo CODEC
Feature AK4678; [AK4678] AK4678 24bit Stereo CODEC with MIC/RCV/HP/SPK/LINE-AMP GENERAL DESCRIPTION The AK4678 is a .
Manufacture AKM
Datasheet
Download AK4678 Datasheet




AKM AK4678
[AK4678]
AK4678
24bit Stereo CODEC with MIC/RCV/HP/SPK/LINE-AMP
GENERAL DESCRIPTION
The AK4678 is a 24bit stereo CODEC with a built-in Microphone-Amplifier, Receiver-Amplifier, Mono
Class-D Speaker-Amplifier, Cap-less Class-G Headphone-Amplifier and Line-Amplifier. The AK4678
features 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 AK4678 can automatically adjust a comfortable volume without distortion and provides
great flexibility. The AK4678 is available in a 49pin CSP, utilizing less board space than competitive
offerings.
FEATURES
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 @ 32
- Analog Volume: +12 ~ 30dB & Mute, 3dB Step
Cap-less Stereo Class-G Headphone-Amp
- Output Power: 25mW @ 32, 45mW @ 16
- 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 @ 8, SVDD=4.2V, THD+N = 10%
0.89W @ 8, 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
MS1403-E-04
-1-
2014/12



AKM AK4678
[AK4678]
3. Dual PCM I/F for Baseband & Bluetooth Interface
Four sample Rate Converters (Up sample: up to x6: Down sample: down to x1/6)
Sample Rate:
- PORTA (Mono): 8 ~ 16kHz
- PORTB (Stereo): 8 ~ 48kHz
Digital Volume
Slave Mode
Audio Interface Format:
- 16bit Linear, 8bit A-law, 8bit μ-law
- Short/Long Frame, I2S, MSB justified
4. Power Management
5. Master Clock(Audio I/F):
(1) PLL Mode
Frequencies: 11.2896MHz, 12MHz, 12.288MHz, 13MHz, 13.5MHz, 19.2MHz,
24MHz, 25MHz, 26MHz, 27MHz (MCKI pin)
32fs or 64fs (BICK pin)
(2) External Clock Mode
Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
6. Output Master Clock Frequencies(Audio I/F): 32fs/64fs/128fs/256fs
7. Sampling Frequency (Audio I/F)
PLL Slave Mode (BICK pin): 8kHz ~ 48kHz
PLL Master Mode:
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
EXT Master/Slave Mode:
8kHz 48kHz (256fs), 8kHz ~ 24kHz (512fs), 8kHz ~ 12kHz (1024fs)
8. Audio I/F: Master/Slave mode
9. μP I/F: I2C Bus (Ver 1.0, 400kHz Fast Mode)
10. Ta = 30 ~ 85C
11. Power Supply:
SVDD (SPK/RCV/LINE-Amp):
3.0 ~ 5.5V
AVDD (Analog):
1.7 ~ 2.0V
DVDD (Digital Core):
1.7 ~ 2.0V
PVDD (HP-Amp & Charge Pump): 1.7 ~ 2.0V
TVDD (Digital I/F):
1.6 ~ 3.6V
12. Package : 49pin CSP(2.96 x 2.96 mm, 0.4mm pitch)
MS1403-E-04
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2014/12



AKM AK4678
Block Diagram
Internal
MIC
External
MIC
MPWR2
MPWR1
LIN1/IN1+
RIN1/IN1
LIN2/IN2
RIN2/IN2+
LIN3/IN3+
RIN3/IN3
LIN4
RIN4
Stereo Line Out
LOUT/LOP
ROUT/LON
Headphone Out
Receiver Out
Speaker Out
HPL
HPR
RCP
RCN
SPP
SPN
[AK4678]
SVDD
PMMPMWPR2
MIC Power
Supply
PMMPMWPR1
MIC Power
Supply
VSS3
AVDD
VSS1 VCOM
MIC-Amp
PMADL
PMADR
To ADC Lch
To ADC Rch
PMLO
PMRO
PMHPL
From DAC Lch
From DAC Rch
PMHPR
PMRCV
To HP-Amp
From PVDD pin
PMSPK
Class-D SPK-Amp
To Headphone-Amp
Charge Pump
SPFIL
Figure 1. Analog Block Diagram
CNB CPB
PVDD
VEE
CPA
CNA
MS1403-E-04
-3-
2014/12







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