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PDF AK4954A Data sheet ( Hoja de datos )

Número de pieza AK4954A
Descripción 32bit Stereo CODEC
Fabricantes AKM 
Logotipo AKM Logotipo



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[AK4954A]
AK4954A
32-bit Stereo CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4954A is a low power consumption 32-bit stereo CODEC with a microphone, a headphone and a
speaker amplifiers. The input circuits include a microphone amplif ier and an ALC (Automatic Level
Control) circuit, and the output circuits include a cap-less headphone amplifier and a speaker amplifier. It
is suitable for portable application with recording/playback function. The integrated charge pump circuit
generates a negative voltage and removes the output AC coupling capacitors. The speaker amplifier has
a wide operating voltage range, which is from 0.9V to 5.5V, enabling a direct drive to batteries. The
AK4954A is available in a small 32-pin QFN (4x4mm 0.4mm pitch), utiliz ing less board space than
competitive offerings.
FEATURES
1. Recording Function
Two Low Noise Microphone Power Supplies
Stereo Single-ended input with three Selectors
Low Noise Microphone Amplifier (+26dB/+20dB/+13dB/+6dB/0dB)
Digital ALC (Automatic Level Control)
(Setting Range: +36dB ∼ −52.5dB, 0.375dB Step)
ADC Performance: S/(N+D): 88dB, DR, S/N: 97dB (Microphone Amplifier =+20dB)
S/(N+D): 88dB, DR, S/N: 100dB (Microphone Amplifier =0dB)
Two Types of Decimation Filters
Overflow Detection
Wind-noise Reduction Filter
Stereo Separation Emphasis Circuit
5-band Notch Filter
Digital Microphone Interface
2. Playback Function
Digital ALC (Automatic Level Control)
(Setting Range: +36dB ~ 52.5dB, 0.375dB Step)
3-band Dynamic Range Control Circuit
Digital Volume Control (+6dB ~ 65.5dB, 0.5dB Step, Mute)
Capacitor-less Stereo Headphone Amplifier
- HP-Amplifier Performance: S/(N+D): 65dB@20mW, S/N: 100dB
- Output Power: 20mW@16Ω
- Pop Noise Free at Power-ON/OFF
Mono Speaker-Amplifier (with Stereo Line Output Switch)
- SPK-Amplifier Performance: S/(N+D): 70dB@250mW
Output Noise Level: -97dBV
- BTL Output
- Output Power: 400mW@8Ω (SVDD=3.3V)
100mW@8Ω (SVDD=1.5V)
Beep Generator
3. Power Management
MS1542-E-00-PB
-1-
2013/06
http://www.Datasheet4U.com

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AK4954A pdf
[AK4954A]
Comparison with AK4953A
Function AK4953A
AK4954A
Resolution
24-bit
32-bit
AVDD
2.85V 3.5V
2.5V 3.5V
DVDD
1.6V ~ 2.0V
1.6V ~ 1.98V
SVDD
0.9V 5.5V
TVDD
DVDD 3.5V
1.6V or (DVDD-0.2)V 3.5V
ADC DR, S/N
88dB @ MGAIN = +20dB
97dB @ MGAIN = +20dB
96dB @ MGAIN = 0dB
100dB @ MGAIN = 0dB
DAC S/N
96dB
100dB
Input level
typ. 2.4Vpp @ MIC Gain=0dB
typ. 0.8 x AVDD @ MGAIN=0dB
Output level (Headphone) typ. 1.75Vpp @ DVOL=0dB
typ. 0.485 x AVDD @ DVOL=0dB
MIC Power Output Voltage typ 2.3V (2 Line Outputs)
0.8 x AVDD (2 Line Outputs)
MIC Power Output Noise -108dBV (A-weighted)
-120dBV (A-weighted)
MIC-Amp
0dB/+12dB/+16dB/+20dB/+23dB/
0dB/+6dB/+13dB/+20dB/+26dB
+26dB/+29dB
ADC Overflow Output
No
Yes (pin selectable OVF/MCKI)
Stereo Emphasis
No
Yes
Output Volume
+36dB -54dB, 0.375dB Step (Note 1) +36dB -52.5dB, 0.375dB Step (Note 1) &
& +12dB -115dB, 0.5dB Step
+6dB -65.5dB, 0.5dB Step
Dynamic Range Control
No
Yes (for Playback)
Line Output Switch for
No
Yes
Speaker-Amp
Master Clock Reference for 11.2896MHz, 12MHz, 13.5MHz,
11.2896MHz, 12MHz, 12.288MHz,
PLL Mode
Serial μP Interface
24MHz, 27MHz
3-wire Serial or I2C Bus
13.5MHz, 24MHz, 27MHz
I2C Bus
Power Consumption
(Stereo Recording) typ. 9.4mW
typ. 10.4mW (Low-power operation mode)
(Headphone Playback) typ. 10.2mW
typ. 6.2mW (Low-power operation mode)
Package
36-pin QFN (5 x 5mm, 0.4mm pitch) 32-pin QFN (4 x 4mm, 0.4mm pitch)
Note 1. ALC and Vol ume circuits are shared by input and out put. Therefore, i t is impossible to use ALC and Vol ume
control function at the same time for both recording and playback mode.
MS1542-E-00-PB
-5-
2013/06

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AK4954A arduino
[AK4954A]
Parameter min
typ max Unit
Beep Output Characteristics: BEEP Generator HPL, HPR pins, SPP/SPN pins, LOUT, ROUT pins
Output Voltage (BPLVL = 0dB)
HPL, HPR pins (RL=16Ω)
SPP/SPN pins (RL=8Ω, BTL, SLG = +4.26dB)
LOUT, ROUT pins (RL=10kΩ, SLG = 0dB)
Gain
- 1.5
- 2.8
- 1.4
- Vpp
- Vpp
- Vpp
Gain Setting
-60 -
0 dB
Step Width
- 3 - dB
Power Supplies:
Power-up (PDN pin = “H”)
MIC + ADC + DAC + Headphone out
AVDD+DVDD+TVDD
(Note 21) -
9.2 13.8 mA
AVDD+DVDD+TVDD
(Note 22) -
8.2 - mA
SVDD (No Load)
- 8 12 μA
MIC + ADC + DAC + Speaker out
AVDD+DVDD+TVDD
(Note 23) -
8.2 12.3 mA
AVDD+DVDD+TVDD
(Note 24) -
7.2 - mA
SVDD (No Load)
- 0.8 1.2 mA
Power-down (PDN pin = “L”) (Note 25)
AVDD+DVDD+TVDD+SVDD -
0 10 μA
SVDD (Note 26) -
0 10 μA
Note 21. When PLL Master Mode (MCKI=12MHz), and PMADL=PMADR=PMDAC=PMPFIL=PMHPL=PMHPR=
PMVCM=PMPLL=PMBP=PMMP=M/S bits = “1”, and LPMIC = LPDA bits = “0”. In this case, the MPWR1
(MPWR2) pin outputs 0mA. AVDD= 7.3mA (typ), DVDD= 1.6mA (typ), TVDD= 0.3mA (typ).
Note 22. When EXT Slave Mode (PMPLL=M/S bits =“0”), PMADL=PMADR=PMDAC=PMHPL=PMHPR=
PMVCM=PMBP=PMMP bits = “1”, and PMPFIL = LPMIC = LPDA bits = “0”. In this case, the MPWR1
(MPWR2) pin outputs 0mA. AVDD= 6.5mA (typ), DVDD= 1.6mA (typ), TVDD= 0.1mA (typ).
Note 23. When PLL Master Mode (MCKI=12MHz), and PMADL=PMADR=PMDAC=PMPFIL=PMSL=PMVCM=
PMPLL=PMBP=PMMP=M/S bits = “1”, and LPMIC = LPDA bits = “0”. In this case, the MPWR1 (MPWR2)
pin outputs 0mA. AVDD= 6.5mA (typ), DVDD= 1.4mA (typ), TVDD= 0.3mA (typ).
Note 24. When EXT Slave Mode (PMPLL=M/S bits =“0”), PMADL=PMADR=PMDAC=PMSL=PMVCM=
PMBP=PMMP bits = “1”, and PMPFIL = LPMIC = LPDA bits = “0”. In this case, the MPWR1 (MPWR2) pin
outputs 0mA. AVDD= 5.7mA (typ), DVDD= 1.4mA (typ), TVDD= 0.1mA (typ).
Note 25. All digital input pins are fixed to TVDD or VSS2.
Note 26. When AVDD, DVDD, and TVDD are powered OFF.
MS1542-E-00-PB
- 11 -
2013/06

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