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PDF AK4691 Data sheet ( Hoja de datos )
| Número de pieza | AK4691 | |
| Descripción | 4ch ADC + 2ch DAC | |
| Fabricantes | AKM | |
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[AK4691]
AK4691
4ch ADC + 2ch DAC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4691 is a 16bit, 4ch ADC and 2ch DAC with Microphone-Amplifier, Headphone-Amplifier, and
Speaker-Amplifier. The recording block corresponds to supports 4-channel inputs, and also has 3-input
selector for Internal/External MIC and LINE, output power for Microphone, Pre-Amp, and ALC (Automatic
Level Control) circuit. The playback bock has Lineout-Amplifier, Headphone-Amplifier, and
Speaker-Amplifier. The AK4691 is suitable for portable applications such as built-in LCD. The AK4691 is
available in a 57pin BGA, utilizing less board space than competitive offerings.
FEATURES
1. Recording Function
• 4-channel Single-ended Pre-Amp
(Pre-Amp Gain: 0dB, +18dB, +20dB, +24dB or +28dB)
• 2-channel Line Input
• 3-input Selector (Internal MIC, External MIC or LINE)
• 4-channel Digital ALC (Automatic Level Control)
• ADC Performance: S/(N+D): 82dB, DR, S/N: 90dB (Pre-Amp=+24dB)
S/(N+D): 85dB, DR, S/N: 90dB (LINE)
• Wind-noise Reduction Filter
• Stereo Separation Emphasis
• Fade-in/out Function
2. Playback Function
• Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)
• Digital Volume (+12dB ∼ −115.0dB, 0.5dB Step, Mute)
• Digital ALC (Automatic Level Control)
• Stereo Separation Emphasis
• Stereo Line Output
- Performance: S/(N+D): 85dB, S/N: 90dB
- Output Level: -3.9dBV @ AVDD=LVDD=3.0V, LVOL=0dB
+2dBV @ AVDD=3.0V, LVDD=4.5V, LVOL=+5.9dB
• Stereo Headphone-Amp
- S/(N+D): 70dB, S/N: 90dB
- Output Power: 58mW @ 16Ω (LVDD=3.3V)
- Pop Noise Free at Power ON/OFF
• Mono Speaker-Amp
- S/(N+D): 50dB@240mW, S/N: 90dB
- BTL Output
- Output Power: 400mW @ 8Ω (SVDD=3.3V)
• Analog Mixing
3. Power Management
4. Master Clock:
(1) PLL Mode
• Frequencies:
11.2896MHz, 12MHz, 12.288MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
1fs (LRCK pin)
32fs or 64fs (BICK pin)
(2) External Clock Mode
• Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
5. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
MS0672-E-00
-1-
2007/11
1 page  
[AK4691]
PIN/FUNCTION
No. Pin Name
Power Supply
D9 AVDD
C8 VSS1
I/O
-
-
C9 VCOM
O
G1 DVDD
H1 VSS2
H6 SVDD
H7 VSS3
B6 MVDD
A5 MPWR
A8 MRF
G8 LVDD
G9 LVCM
J8 VSS4
C2 TVDD1
H2 TVDD2
-
-
-
-
-
O
O
-
O
-
-
-
Audio Interface
D2 MCKI
G2 MCKO
F2 LRCK
F1 BICK
D1 SDTI
E1 SDTO1
E2 SDTO2
I
O
I/O
I/O
I
O
O
Control Register Interface
C1 I2CN
I
H3
CSN
CAD0
J3
CCLK
SCL
H4
CDTI
SDA
MIC Block
B5 INTL1
B4 EXTL1
B8 PRELN1
A3 INTR1
B2 EXTR1
A6 PRERN1
A4 INTL2
B3 EXTL2
B7 PRELN2
A2 INTR2
B1 EXTR2
A7 PRERN2
ADC Block
D8 LIN
E9 RIN
I
I
I
I
I
I/O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Function
Analog Power Supply Pin, 2.6 ∼ 3.6V
Ground 1 Pin
Common Voltage Output Pin, 0.5 x AVDD
Bias voltage of ADC inputs and DAC outputs.
Digital Power Supply Pin, 2.6 ∼ 3.6V
Ground 2 Pin
Speaker-Amp Power Supply Pin, 2.6 ∼ 3.6V
Ground 3 Pin
MIC Block Power Supply Pin, 2.6 ∼ 5.5V
MIC Power Output Pin
MIC Power Supply Ripple Filter Pin
Headphone & LINEOUT-Amp Power Supply Pin, 2.6 ∼ 5.5V
LINEOUT-Amp Common Voltage Output Pin, 0.5 x LVDD
Ground 4 Pin
Digital I/F(Audio Interface) Power Supply 1 Pin, 1.6 ∼ 3.6V
Digital I/F(Control Register Interface) Power Supply 2 Pin, 1.6 ∼ 3.6V
External Master Clock Input Pin
Master Clock Output Pin
Input / Output Channel Clock Pin
Audio Serial Data Clock Pin
Audio Serial Data Input Pin
Audio Serial Data Output 1 Pin
Audio Serial Data Output 2 Pin
Control Mode Select Pin
“L”: I2C Bus, “H”: 3-wire Serial
Chip Select Pin (I2CN pin = “H”)
Chip Address 0 Select Pin (I2CN pin = “L”)
Control Data Clock Pin (I2CN pin = “H”)
Control Data Clock Pin (I2CN pin = “L”)
Control Data Input Pin (I2CN pin = “H”)
Control Data Input/Output Pin (I2CN pin = “L”)
Internal MIC Lch Input 1 Pin
External MIC Lch Input 1 Pin
Lch Pre-Amp Negative Input 1 Pin
Internal MIC Rch Input 1 Pin
External MIC Rch Input 1 Pin
Rch Pre-Amp Negative Input 1 Pin
Internal MIC Lch Input 2 Pin
External MIC Lch Input 2 Pin
Lch Pre-Amp Negative Input 2 Pin
Internal MIC Rch Input 2 Pin
External MIC Rch Input 2 Pin
Rch Pre-Amp Negative Input 2 Pin
Lch Line Input Pin
Rch Line Input Pin
MS0672-E-00
-5-
2007/11
5 Page 
[AK4691]
Parameter
min typ max Units
Speaker-Amp Characteristics: DAC → SPP/SPN pins, ALC=OFF, IVOL=DVOL=0dB, RL=8Ω, BTL, SVDD=3.0V
(Note 27)
Output Voltage (Note 26)
SPKG1-0 bits = “00”, 0dBFS (Po=140mW)
- 0.5 - dBV
SPKG1-0 bits = “10”, −3.75dBFS (Po=240mW)
1.4
3 4.6 dBV
SPKG1-0 bits = “11”, −3.75dBFS, SVDD=3.3V,
(Po=400mW)
-
5 - dBV
S/(N+D)
SPKG1-0 bits = “00”, 0dBFS (Po=140mW) - 60 - dB
SPKG1-0 bits = “10”, −3.75dBFS (Po=240mW)
20
50 - dB
SPKG1-0 bits = “11”, −3.75dBFS, SVDD=3.3V
(Po=400mW)
-
20 - dB
S/N (A-weighted)
80 90 - dB
Load Resistance
Load Capacitance
8 - -Ω
- - 30 pF
Mono Input: BEEP pin (External Input Resistance=20kΩ)
Maximum Input Voltage (Note 28)
- 1.8 - Vpp
Gain (Note 29)
BEEP Æ LOUT/ROUT LVOL2-0 bits = “000”
BEEP Æ HPL/HPR
HPG bit = “0”
BEEP Æ SPP/SPN
−4.5
−24.5
0 +4.5 dB
−20
−15.5
dB
ALC bit = “0”, SPKG1-0 bits = “00”
ALC bit = “0”, SPKG1-0 bits = “01”
−0.57
-
+4.43
+6.43
+8.93
-
dB
dB
ALC bit = “0”, SPKG1-0 bits = “10”
-
+10.65
- dB
ALC bit = “0”, SPKG1-0 bits = “11”
-
+12.65
- dB
ALC bit = “1”, SPKG1-0 bits = “00”
-
+6.43
- dB
ALC bit = “1”, SPKG1-0 bits = “01”
-
+8.43
- dB
ALC bit = “1”, SPKG1-0 bits = “10”
-
+12.65
- dB
ALC bit = “1”, SPKG1-0 bits = “11”
-
+14.65
- dB
Note 26. Output voltage is proportional to AVDD voltage. But actual speaker output level is clipped according to the
supplied SVDD voltage.
Vout = typ. 1.0 x AVDD Vpp @ SPKG1-0 bits = “00” & 0dBFS, typ. 1.26 x AVDDVpp @ SPKG1-0 bits = “01”
& 0dBFS, typ. 2.04 x AVDDVpp @ SPKG1-0 bits = “10” & 0dBFS, typ. 2.58 x AVDDVpp @ SPKG1-0 bits =
“11” & 0dBFS at Full-differential.
Note 27. In case of measuring at the SPP and SPN pins.
Note 28. The Maximum voltage is in proportion to both AVDD and external input resistance (Rin). Vin = 0.6 x AVDD x
Rin / 20kΩ (typ).
Note 29. The gain is in inverse proportion to external input resistance.
* 0dBV = 1Vrms = 2.83Vpp
MS0672-E-00
- 11 -
2007/11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4691.PDF ] | |
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