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PDF AK4695 Data sheet ( Hoja de datos )
| Número de pieza | AK4695 | |
| Descripción | 24bit 4ch CODEC | |
| Fabricantes | AKM | |
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[AK4695]
AK4695
24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP
GENERAL DESCRIPTION
The AK4695 is a low power consumption 24bit stereo CODEC with microphone, headphone, speaker
and line amplifiers. The input circuits include 4ch microphone amplifiers, input selectors and an ALC
(Automatic Level Control) circuit, and the output circuits include a line amplifier, 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 AK4695 is available in a small 42pin CSP, utilizing less board space than competitive
offerings.
FEATURES
1. Recording Function
Two Low Noise MIC Power Supplies
Stereo Single-ended input with five Selectors
Low Noise MIC Amplifier: +30dB ~ +24dB (3dB Step), +21dB ~ +3dB (1.5dB Step)
ADC Performance: S/(N+D): 86dB, DR, S/N: 98dB (MIC-Amp=+21dB)
S/(N+D): 93dB, DR, S/N: 103dB (MIC-Amp=+12dB)
Microphone Sensitivity Compensation: 0dB ~ 9dB, 0.75dB Step
HPF x 2/LPF, 2-band Equalizer
4ch Digital ALC (Automatic Level Control)
(Setting Range: +54dB ~ 36dB, 0.375dB Step)
Soft Mute
4ch Digital MIC Interface
2. Playback Function
Digital ALC (Automatic Level Control)
(Setting Range: +54dB ~ 36dB, 0.375dB Step)
3-band Dynamic Range Control Circuit
Digital Volume Control (+12dB ~ 115dB, 0.5dB Step, Mute)
Stereo Line Amplifier
Capacitor-less Stereo Headphone Amplifier
- HP-AMP Performance: S/(N+D): 75dB@15mW
- Output Power: 30mW@16
- Pop Noise Free at Power-ON/OFF
Mono Speaker Amplifier (with Stereo Line Output Switch)
- SPK-AMP Performance: S/(N+D): 70dB@250mW
- BTL Output
- Output Power: 400mW@10%, 6 (SVDD=2.8V)
- Thermal Shutdown
- Beep Input: +16dB ~ +2dB, 2dB Step
3. Power Management
4. Master Clock: 256fs, 512fs or 1024fs (MCKI pin)
5. Sampling Frequency: 8kHz ~ 48kHz (256fs, 512fs), 8kHz ~ 16kHz (1024fs)
MS1463-E-01
-1-
2014/12
1 page  
[AK4695]
PIN/FUNCTION
No. Pin Name I/O Function
D6 MPWRA O MIC Power Supply A Pin
C6 MPWRB O MIC Power Supply B Pin
D4
MICIN0L
DDAT0
I Lch MIC Input 0 Pin
I Digital Microphone Data Input 0 Pin
C4 MICIN0R I Rch MIC Input 0 Pin
DMCLK
O Digital Microphone Clock Output Pin
A4
MICIN1L
DDAT1
I Lch MIC Input 1 Pin
I Digital Microphone Data Input 1 Pin
(DMIC bit = “0”)
(DMIC bit = “1”)
(DMIC bit = “0”)
(DMIC bit = “1”)
(DMIC bit = “0”)
(DMIC bit = “1”)
B4 MICIN1R I Rch MIC Input 1 Pin
B6 MICIN2L I Lch MIC Input 2 Pin
A6 MICIN2R I Rch MIC Input 2 Pin
B5 MICIN3L I Lch MIC Input 3 Pin
A5 MICIN3R I Rch MIC Input 3 Pin
A3 AUXINL I Lch Auxiliary Input Pin
A2 AUXINR I Rch Auxiliary Input Pin
E4 BEEPIN
I Beep Signal Input pin
G5
SPP
LOUTB
O Speaker-Amp Positive Output Pin
O Lch Line Output B Pin
F4
SPN
ROUTB
O Speaker-Amp Negative Output Pin
O Rch Line Output B Pin
(LBSEL bit = “0”)
(LBSEL bit = “1”)
(LBSEL bit = “0”)
(LBSEL bit = “1”)
F1 HPL
O Lch Headphone-Amp Output Pin
G1 HPR
O Rch Headphone-Amp Output Pin
F6 LOUTA
O Lch Line Output A Pin
G6 ROUTA
O Rch Line Output A Pin
B3 PDN
Power-down & Reset Pin
I When “L”, the AK4695 is in power-down mode and is held reset.
The AK4695 must be always reset upon power-up.
C2 CSN
I Chip Select Pin
C1 CCLK
I Control Data Clock Pin
D1 CDTIO
I/O Control Data Input/Output Pin
A1 GPO1
O General Purpose Output 1 Pin
B1 MCKI
I External Master Clock Input Pin
E3 BCKI
I Audio Serial Data Clock Input Pin
D3 LRCK
I Input/Output Channel Clock Input Pin
D2 SDTI
I Audio Serial Data Input Pin
E2 SDTO1
O Audio Serial Data Output 1 Pin
E1 SDTO2
O Audio Serial Data Output 2 Pin
D5 AVDD
- Analog Power Supply Pin, 2.7 ~ 3.5V
E5 VSS1
- Ground 1 Pin (Recording & Line Output A Analog GND)
F5 VSS2
- Ground 2 Pin (Playback Analog GND)
F2 DVDD
- Digital & Headphone-Amp Power Supply Pin, 1.6 ~ 2.0V
C3 TVDD
- Digital I/O Power Supply Pin, 1.6 ~ 3.5V
B2 VSS3
- Ground 3 Pin (Digital GND)
G4 SVDD
- Speaker-Amp & Charge Pump Power Supply Pin, 2.7 ~ 3.5V
E6 VCOM
Common Voltage Output Pin
O Bias voltage of ADC inputs and DAC outputs.
This pin must be connected to VSS1 via a 1μF capacitor.
C5 MRF
O MIC Power Supply Ripple Filter Pin
MS1463-E-01
-5-
2014/12
5 Page 
[AK4695]
Parameter
min typ
max Unit
DAC Characteristics:
Resolution
--
24 Bits
Stereo Line Output A Characteristics: DACA → LOUTA/ROUTA pins (Measurement Point 1; Note 20),
ALC=DRC=OFF, IVOL=DVLA=0dB, LVOL= +3.2dB, RL=1k+22k
Output Voltage
0dBFS, LVOL=-0.4dB (Note 18)
-10dBFS, LVOL=+3.2dB
-4.2
-10.6
-3.2
-9.6
-2.2 dBV
-8.6 dBV
0dBFS, LVOL=-0.4dB
72 87
- dB
S/(N+D)
-2dBFS, LVOL=+3.2dB
40 -
- dB
-10dBFS, LVOL=+3.2dB
69 84
- dB
S/N (A-weighted)
LVOL=-0.4dB
S=-10dBFS, LVOL=+3.2dB
85
76
95
86
- dB
- dB
Interchannel Isolation
85 100
- dB
Interchannel Gain Mismatch
- 0 0.5 dB
PSRR (fin = 1kHz) (Note 19)
- 50
- dB
Load Resistance (RL) (Note 20)
10 -
-
Load Capacitance (CL1) (Note 20)
- - 30
Load Capacitance (CL2) (Note 20)
- - 500
Crosstalk (Note 21)
- -100
-
Headphone-Amp Characteristics: DACB → HPL, HPR pins, ALC=DRC=OFF, IVOL=DVLB= 0dB,
DACAST bit “1”, RL=16
k
pF
pF
dB
Output Voltage (Note 22)
0dBFS
-3dBFS
- 0.7
1.26 1.40
- Vrms
1.54 Vpp
S/(N+D) (0dBFS)
0dBFS
-3dBFS
- 70
55 75
- dB
- dB
S/N (A-weighted)
87 97
- dB
Interchannel Isolation
65 80
- dB
Interchannel Gain Mismatch
- 0 0.8 dB
Output Offset Voltage (Note 23)
-1 0
+ 1 mV
(Note 24)
- 50
- dB
PSRR (fin = 1kHz)
(Note 25)
- 60
- dB
(Note 26)
- 80
- dB
Load Resistance
16 -
-
Load Capacitance
- - 300 pF
Crosstalk (Note 27)
- -60
- dB
Note 18. The full-scale output voltage is proportional to AVDD. typ. (0.70 x AVDD) Vpp
Note 19. PSRR is applied to AVDD or DVDD with 100mpVpp sine wave.
Note 20. Measured at measurement points in Figure 3.
Measurement point 1 Measurement point 2
1μF 1k
Line Output
CL1 CL2 RL
Figure 3. Load Resistance RL & Load Capacitance CL1, CL2
Note 21. A recording cross talk (MPWR on, MGAIN=+21dB, the AUXINL/R inputs are coupled by 1μF and a 600
resistor is connected between VSS1 and the AUXINL/R pins.) of DAC and LINE output (LVOL=+3.2dB,
0dBFS). (The reference voltage is the full-scale output voltage.)
Note 22. The full-scale output voltage is proportional to AVDD. typ. (0.707 x AVDD) Vpp
Note 23. -1.5mV(min) and +1.5mV(max) when AVDD=3.5V.
Note 24. PSRR is applied to AVDD with 100mpVpp sine wave.
Note 25. PSRR is applied to SVDD with 100mpVpp sine wave.
Note 26. PSRR is applied to DVDD with 100mpVpp sine wave.
Note 27. A recording cross talk (MPWR on, MGAIN=+21dB, the AUXINL/R inputs are coupled by 1μF and a 600
resistor is connected between VSS1 and the AUXINL/R pins.) of DAC and HP output (0dBFS). (The reference
voltage is full-scale output voltage.)
MS1463-E-01
- 11 -
2014/12
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4695.PDF ] | |
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