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Stereo CODEC. AK4673 Datasheet |
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[AK4673]
AK4673
Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
GENERAL DESCRIPTION
The AK4673 is a stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier and Touch
Screen Controller (TSC) which includes the SAR type ADC. The AK4673 features analog mixing circuits,
PLL and a 4-wire resistive touch screen I/F that allows easy interfacing in mobile phone and portable A/V
player designs. The AK4673 is available in a 57pin BGA package, utilizing less board space than
competitive offerings.
FEATURES
1. Recording Function
• 4 Stereo Input Selectors
• Stereo Mic Input (Full-differential or Single-ended)
• Stereo Line Input
• MIC Amplifier (+32dB/+26dB/+20dB or 0dB)
• Digital ALC (Automatic Level Control)
(+36dB ∼ −54dB, 0.375dB Step, Mute)
• ADC Performance: S/(N+D): 83dB DR, S/N: 86dB (MIC-Amp=+20dB)
S/(N+D): 88dB DR, S/N: 95dB (MIC-Amp=0dB)
• Wind-noise Reduction Filter
• Stereo Separation Emphasis
• Programmable EQ
2. Playback Function
• Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)
• Bass Boost
• Soft Mute
• Digital Volume (+12dB ∼ −115.0dB, 0.5dB Step, Mute)
• Digital ALC (Automatic Level Control)
(+36dB ∼ −54dB, 0.375dB Step, Mute)
• Stereo Separation Emphasis
• Programmable EQ
• Stereo Line Output
- Performance: S/(N+D): 88dB, S/N: 92dB
• Stereo Headphone-Amp
- S/(N+D): 70dB@7.5mW, S/N: 90dB
- Output Power: 70mW@16Ω (HVDD=5V), 62mW@16Ω (HVDD=3.3V)
- Pop Noise Free at Power ON/OFF
• Analog Mixing: 4 Stereo Input
3. Power Management
4. Master Clock:
(1) PLL Mode
• Frequencies:
- MCKI pin: 11.2896MHz, 12MHz, 12.288MHz, 13MHz, 13.5MHz,
19.2MHz, 24MHz, 26MHz, 27MHz
- LRCK pin: 1fs
- BICK pin: 32fs or 64fs
(2) External Clock Mode
• Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
5. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
MS0670-E-00
-1-
2007/09
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[AK4673]
6. Sampling Rate:
• PLL Slave Mode (LRCK pin): 7.35kHz ∼ 48kHz
• PLL Slave Mode (BICK pin): 7.35kHz ∼ 48kHz
• PLL Slave Mode (MCKI pin):
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• PLL Master Mode:
8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• EXT Master/Slave Mode:
7.35kHz ∼ 48kHz (256fs), 7.35kHz ∼ 26kHz (512fs), 7.35kHz ∼ 13kHz (1024fs)
7. Master/Slave mode
8. Audio Interface Format: MSB First, 2’s complement
• ADC: 16bit MSB justified, I2S, DSP Mode
• DAC: 16bit MSB justified, 16bit LSB justified, 16-24bit I2S, DSP Mode
9. Touch Screen Control Function
• 12-bit SAR type A/D Converter with S/H circuit
• 4-wire Resistive Touch Screen Interface
• Pen Pressure Measurement
• Auto Power Down
• Continuous Read Operation
10. μP I/F: I2C Bus (Ver 1.0, 400kHz Fast-Mode)
11. Ta = -30 ∼ 85°C
12. Power Supply:
• AVDD (Analog): 2.6 ∼ 3.6V
• DVDD (Digital): 2.6 ∼ 3.6V
• HVDD (Headphone): 2.6 ∼ 5.25V
• TVDD1 (Digital I/O): 2.5 ∼ 3.6V
• TVDD2 (Digital I/O): 1.6 ∼ 3.6V
• TSVDD (Touch Screen Controller): 2.5 ∼ 3.6V
13. Package: 57pin BGA (5mm x 5mm, 0.5mm pitch)
MS0670-E-00
-2-
2007/09
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[AK4673]
■ Block Diagram
Internal
MIC
External
MIC
Line In
Line In
Stereo Line Out
Headphone
MPWR
LIN1
RIN1
LIN2
RIN2
XP YP XN YN
PENIRQN
TSVDD TVDD1 SCLT SDAT
MPMPWMPR
MIC Power
Supply
PMADL
or PMMICL
Touch Panel I/F
PEN
INTERRUPT
SAR A/D
Control
Register
MIC-Amp
PMADR
or PMMICR
PMADL or PMADR
A/D
HPF
Wind-Noise Stereo
Reduction Separation
ALC
LIN3/MIN
* RIN3
LIN4
RIN4
PMAINR4
PMAINL4
LOUT
PMLO
ROUT
PMHPL
HPL
HPR
MUTET
PMHPR
PMAINR2
PMAINL2
PMAINR3
Audio
I/F
PMAINL3
PMMIN
PMDAC
D/A
DATT Bass
SMUTE Boost
ALC
Stereo
Separation
HPF
PMPLL
PLL
I2CA
CADT
CADA
SCLA
SDAA
PDN
TVDD2
BICK
LRCK
SDTO
SDTI
MCKO
MCKI
* VCOC
HVDD VSS2
AVDD VSS1
VSS3
VCOM
DVDD
(VCOC and RIN3 pins are shared by the same pin.)
Figure 1. Block Diagram
MS0670-E-00
-3-
2007/09
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