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PDF AK4642 Data sheet ( Hoja de datos )
| Número de pieza | AK4642 | |
| Descripción | 16-Bit DS Stereo CODEC | |
| Fabricantes | AKM | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AK4642 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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ASAHI KASEI
[AK4642]
AK4642
16-Bit ∆Σ Stereo CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4642 features a 16-bit stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier
and Speaker-Amplifier. Input circuits include a Micr ophone-Amplifier and an ALC (Auto Level Control)
circuit that is suitable for portable application with recording/playback function. The AK4642 is available in
a 32pin QFN, utilizing less board space than competitive offerings.
FEATURES
1. Resolution: 16bits
2. Recording Function
• 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
3. 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)
(+36dB ∼ −54dB, 0.375dB Step, Mute)
• Stereo Separation Emphasis
• Stereo Line Output
- Performance: S/(N+D): 88dB, S/N: 92dB
• Stereo Headphone-Amp
- S/(N+D): 70dB, S/N: 90dB
- Output Power: 15mW@16Ω (HVDD=3.3V)
- Pop Noise Free at Power ON/OFF
• Mono Speaker-Amp
- S/(N+D): 50dB@240mW, S/N: 90dB
- BTL Output
- Availbable for both Dynamic and Piezo Speaker
- Output Power: 400mW@8Ω (HVDD=3.3V)
3.0Vrms@50Ω (HVDD=5V)
• Beep Input
4. Power Management
5. 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)
6. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
MS0358-E-02
-
1-
2005/04
http://www.Datasheet4U.com
1 page  
ASAHI KASEI
Comparison with AK4631
Function AK4631
Mic Input
Stereo Mic Input
ADC
MIC ALC
Wind-noise Reduction Filter
Stereo Separation Emphasis
ALC for Playback
Soft Mute
Bass Boost
De-emphasis
DAC
HP-Amp
Line Output
Line Output Level
µP I/F
MCKI Pull-down
Analog Loopback
DSP Mode
Package
Regester Map
Single-ended
N/A
Mono
+27.5dB to –8dB, 0.5dB step
N/A
N/A
SP only, +18dB to –8dB
N/A
N/A
N/A
Mono
N/A
Mono
1.98Vpp
3-wire
Available
Available
Available
28pin QFN (5.2mm x 5.2mm)
[AK4642]
AK4642
Single-ended / Full-differential
Available
Stereo
+36dB to –54dB, 0.375dB step, Mute
Available
Available
Line/HP/SP, +36dB to –54dB
Available
Available
Available
Stereo
Available
Stereo
1.98Vpp/2.50Vpp
3-wire/I2C
N/A
N/A
N/A
32pin QFN (5.2mm x 5.2mm)
Upper-compatible (Difference: ALC
parameter, Analog Loopback & DSP
Mode Removed)
MS0358-E-02
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5-
2005/04
5 Page 
ASAHI KASEI
[AK4642]
Parameter
min typ
max Units
DAC Characteristics:
Resolution
- - 16 Bits
Stereo Line Output Characteristics: DAC → LOUT, ROUT pins, ALC=OFF, IVOL=0dB, DVOL=0dB, LOVL bit =
“0”, RL=10kΩ
Output Voltage (Note 17)
LOVL bit = “0”
1.78
1.98
2.18 Vpp
LOVL bit = “1”
2.25
2.50
2.75 Vpp
S/(N+D) (−3dBFS)
78 88
- dBFS
S/N (A
-weighted)
82 92
- dB
Interchannel Isolation
80 100
- dB
Interchannel Gain Mismatch
- 0.1 0.5 dB
Load Resistance
10 -
- kΩ
Load Capacitance
- - 30 pF
Headphone-Amp Characteristics: DAC → HPL/HPR pins, ALC=OFF, IVOL=0dB, DVOL=0dB
Output Voltage (Note 18)
(Note 19)
(Note 20)
1.58 1.98
2.40 3.00 3.60
2.38 Vpp
Vpp
S/(N+D) (−3dBFS)
(Note 19)
(Note 20)
60
- 80 -
70
- dBFS
dBFS
S/N (A-
weighted)
(Note 19)
(Note 20)
80
-
90
90
- dB
- dB
Interchannel Isolation
(Note 19)
(Note 20)
65
-
75
80
- dB
- dB
Interchannel Gain Mismatch
(Note 19)
(Note 20)
-
-
0.1 0.8 dB
0.1 0.8 dB
Load Resistance
(Note 19)
(Note 20)
20
100
-
-
-Ω
-Ω
Load Capacitance
C1 in Figure 2
C2 in Figure 2
-
-
- 30 pF
- 300 pF
Note 17. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ)@LOVL bit = “0”.
Note 18. Output voltage is proportional to AVDD voltage.
Vout = 0.6 x AVDD(typ)@HPG bit = “0”, 0.91 x AVDD(typ)@HPG bit = “1”.
Note 19. HPG bit = “0”, HVDD=3.3V, RL=22.8Ω.
Note 20. HPG bit = “1”, HVDD=5V, RL=100Ω.
HP-Amp
HPL/HPR pin
47µF
6.8Ω
C1
C2 16Ω
Figure 2. Headphone-Amp output circuit
MS0358-E-02
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11 -
2005/04
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4642.PDF ] | |
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