ASAHI KASEI
[AK4642EN]
AK4642EN
Stereo CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4642 features a stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier and
Speaker-Amplifier. Input circuits include a Microphone-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. 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
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)
(+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: 62mW@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)
•
Analog Mixing: Mono Input
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
MS0420-E-00
-1-
2005/09
ASAHI KASEI
[AK4642EN]
6. Sampling Rate:
•
PLL Slave Mode (LRCK pin): 7.35kHz
∼
48kHz
•
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 Slave Mode:
7.35kHz
∼
48kHz (256fs), 7.35kHz
∼
26kHz (512fs), 7.35kHz
∼
13kHz (1024fs)
7.
µP
I/F: 3-wire Serial, I
2
C Bus (Ver 1.0, 400kHz High Speed Mode)
8. Master/Slave mode
9. Audio Interface Format: MSB First, 2’s compliment
•
ADC : 16bit MSB justified, I
2
S
•
DAC : 16bit MSB justified, 16bit LSB justified, 16-24bit I
2
S
10. Ta =
−30 ∼
85°C (SPK-Amp=OFF)
−30 ∼
70°C (SPK-Amp=ON)
11. Power Supply:
•
AVDD, DVDD: 2.6
∼
3.6V (typ. 3.3V)
•
HVDD: 2.6
∼
5.25V (typ. 3.3V/5.0V)
12. Package: 32pin QFN (5mm x 5mm, 0.5mm pitch)
13. Register Upper-Compatible with Mono CODEC (AK4536/4630/4631)
Block Diagram
AVDD
PMMP
AVSS
VCOM
DVDD
DVSS
MPWR
MIC Power
Supply
PMADL
I2C
Cont rol
Register
CSN
CCLK
CDTI
PMADL or PMADR
LIN1
Internal
MIC
RIN1
MIC-Amp
LIN2
PMADR
A/D
HPF
Wind-Noise
Reduction
Stereo
Separation
PDN
ALC
External
MIC
RIN2
or
BICK
LRCK
SDTO
Audio
I/F
SDTI
Line In
PMLO
LOUT
Line Out
ROUT
PMHPL
PMDAC
HPL
Headphone
HPR
MUTET
PMHPR
D/A
DATT Bass
SMUTE Boost
Stereo
ALC Separation
HPF
PMPLL
MCKO
PLL
MCKI
VCOC
PMSPK
SPP
Speaker
SPN
PMBP
HVDD
HVSS
MIN
Figure 1. Block Diagram
MS0420-E-00
-2-
2005/09
ASAHI KASEI
[AK4642EN]
Ordering Guide
AK4642EN
AKD4642
−30 ∼
+85°C
32pin QFN (0.5mm pitch)
Evaluation board for AK4642
Pin Layout
MCKO
18
HVDD
HVSS
24
23
22
21
20
MUTET
ROUT
LOUT
MIN
RIN2 / IN2−
LIN2 / IN2+
LIN1 / IN1−
RIN1 / IN1+
19
17
MCKI
HPR
SPN
SPP
HPL
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
16
15
14
DVSS
DVDD
BICK
LRCK
SDTO
SDTI
CDTI / SDA
CCLK / SCL
AK4642EN
Top View
13
12
11
10
9
MPWR
VCOM
VCOC
AVDD
AVSS
MS0420-E-00
-3-
CSN / CAD0
PDN
I2C
2005/09
ASAHI KASEI
[AK4642EN]
Comparison with AK4537
Function
Mic Input
Stereo Mic Input
MIC-Power
MIC-Amp
MIC ALC
Wind-noise Reduction Filter
Stereo Separation Emphasis
Mono Mic Mode
ALC for Playback
DATT
Bass Boost
DAC Digital Filter
Stopband Attenuation
Line Output Level
Usage for Piezo Speaker
PLL Input Frequency
µP
I/F
X’tal
MCKI AC Input
MCKI Pull-down
Analog Loopback
Mono Line Output
Stereo Beep Input
Power Supply (HVDD)
Package
Register Map
AK4537
Single-ended
1-Input
2-Output, R
L
=2kΩ (min)
+20dB or 0dB
+27.5dB to –8dB, 0.5dB step
N/A
N/A
N/A
SP only, +18dB to –8dB
0 to –127dB, Mute
+5.74dB/+5.94dB/+16.04dB@20Hz
43dB
1.98Vpp
N/A
11.2896MHz, 12MHz, 12.288MHz
4-wire/I
2
C(100kHz mode)
Available
Available
Available
Available
Available
Available
2.4
∼
3.6V
52pin QFN (7.2mm x 7.2mm)
AK4642EN
Single-ended / Full-differential
2-Input selectable
1-Output, R
L
=0.5kΩ (min)
+32dB/+26dB/+20dB or 0dB
+36dB to –54dB, 0.375dB step, Mute
Available
Available
Available
Line/HP/SP, +36dB to –54dB
+12 to –115dB, Mute
+5.76dB/+10.80dB/+16.06dB@20Hz
59dB
1.98Vpp/2.50Vpp
Available
11.2896MHz, 12MHz, 12.288MHz,
13.5MHz, 24MHz, 27MHz
3-wire/I
2
C(400kHz mode)
N/A
N/A
N/A
N/A
N/A
N/A
2.6
∼
5.25V
32pin QFN (5mm x 5mm)
No Compatibility
MS0420-E-00
-4-
2005/09
ASAHI KASEI
[AK4642EN]
Comparison with AK4631
Function
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
AK4631
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)
AK4642EN
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/I
2
C
N/A
N/A
N/A
32pin QFN (5mm x 5mm)
Upper-compatible (Difference: ALC
parameter, Analog Loopback & DSP
Mode Removed)
MS0420-E-00
-5-
2005/09