Stereo CODEC. AK4950 Datasheet

AK4950 CODEC. Datasheet pdf. Equivalent


AKM AK4950
[AK4950]
AK4950
24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP & mini DSP
GENERAL DESCRIPTION
The AK4950 is a 24bit stereo CODEC with a microphone, speaker and headphone amplifiers. The input
circuits include a microphone amplifier and the output circuits include a speaker amplifier. It is suitable for
portable application with recording/playback function. The integrated charge pump generates an internal
negative power supply rail and removes the output coupling capacitor. A one channel composite In/Out
video amplifier is also integrated. Digital sound processing is provided by the internal DSP. The AK4950 is
available in a small 32pin QFN (4mm x 4mm, 0.4mm pitch), saving more board space.
FEATURES
1. Recording Functions
Stereo Single-ended input with two Selectors
MIC Amplifier (+24dB/+21dB/+18dB/+16dB/+14dB/+11dB/+8dB/+5dB/0dB)
Digital ALC (Automatic Level Control)
(Setting Range: +35.625dB ∼ −54dB, 0.375dB Step)
ADC Performance: S/(N+D): 83dB, DR, S/N: 88dB (MIC-Amp=+18dB)
S/(N+D): 85dB, DR, S/N: 96dB (MIC-Amp=0dB)
MIC Sensitivity Compensation
Wind-noise Reduction Filter
4 Band Notch Filter
Stereo Separation Emphasis Circuit
Digital MIC Interface
2. Playback Functions
Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)
Digital ALC (Automatic Level Control)
(Setting Range: +35.625dB ~ 54dB, 0.375dB Step)
Digital Volume Control (+12dB ~ 78dB, 0.375dB Step)
Stereo Separation Emphasis Circuit
Stereo Line Output
- S/(N+D): 83dB, S/N: 92dB
Mono Mixing Output
Mono Speaker-Amplifier
- SPK-Amp Performance: S/(N+D): 75dB@150mW, 70dB@250mW,
S/N: 95dB
- Thermal Shut-down
- BTL Output
- Output Power: 400mW@8Ω (SVDD=3.3V)
Analog Mixing: Mono Input
3. Power Management
4. Master Clock:
(1) PLL Mode
Frequencies: 11.2896MHz, 12MHz, 13.5MHz, 24MHz, 25MHz, 27MHz (MCKI pin)
32fs or 64fs (BICK pin)
(2) External Clock Mode
Frequencies: 512fs or 1024fs (MCKI pin)
MS1320-E-00
-1-
2011/10


AK4950 Datasheet
Recommendation AK4950 Datasheet
Part AK4950
Description 24bit Stereo CODEC
Feature AK4950; [AK4950] AK4950 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP & mini DSP GENERAL DESCRIPTION Th.
Manufacture AKM
Datasheet
Download AK4950 Datasheet




AKM AK4950
[AK4950]
5. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
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 (512fs), 7.35kHz 13kHz (1024fs)
6. μP I/F: 3-wire Mode, I2C Bus (Ver 1.0, 400kHz Fast-Mode)
7. Master/Slave mode
8. Audio Interface Format: MSB First, 2’s complement
ADC: 24bit MSB justified, 16/24bit I2S
DAC: 24bit MSB justified, 16bit LSB justified, 24bit LSB justified, 16/24bit I2S
9. Video Functions
One Composite Signal Input
Capacitor-less Video Amplifier for Composite Signal Output
Gain: +6 / +9 / +12 / +16.5dB
LPF
Charge Pump Circuit for Negative Power Supply
10. Ta = 30 85°C
11. Power Supply:
Analog Power Supply (AVDD): 2.7 ~ 3.6V
Digital I/O Power Supply (TVDD): 1.6 ~ 3.6V
12. Package: 32pin QFN (4 x 4mm, 0.4mm pitch)
MS1320-E-00
-2-
2011/10



AKM AK4950
Block Diagram
[AK4950]
Internal
MIC
External
MIC
Line Out
Speaker
Composite
Video Out
MPWR
LIN1
RIN1
LIN2
RIN2
LOUT
ROUT/MIN
AVDD VSS1 REGFILA REGFILB VCOM
TVDD VSS2
PMMP
MIC Power
Supply
PMADL
LDO: 2.3V
LDO: 1.8V
MIC-Amp
PMADR
PMADL or PMADR
A/D HPF
PMLO
PMBP
Analog Block
Digital Block
MIC Power, SPK-Amp, LINE/Video-out-Amp
PMPFIL
MIC Sensitivity
Compensation
HPF2
LPF
Stereo
Separation
3 Band EQ
ALC
1 Band EQ
Audio
I/F
VSS3
SPP
SPN
PMSPK
SPK-amp
PMDAC
Mono/
D/A DEM Stereo
VOUT
PMV
LPF
+6/9/12/16.5dB
CLAMP
PMCP
Charge CLK
Pump GEN
VIN
VSS4 PVEE
DVOL
SMUTE
PMPLL
PLL
Control
Register
PDN
BICK
LRCK
SDTO
SDTI
MCKO
MCKI
CSN/SDA
CCLK/SCL
CDTIO/CAD0
I2C
Total: 32pin
Figure 1. Block Diagram
MS1320-E-00
-3-
2011/10







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