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PDF AK4537 Data sheet ( Hoja de datos )
| Número de pieza | AK4537 | |
| Descripción | 16-Bit Stereo CODEC | |
| Fabricantes | Asahi Kasei Microsystems | |
| Logotipo |  |
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ASAHI KASEI
[AK4537]
AK4537
16-Bit ∆Σ Stereo CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4537 targeted at PDA and other low-power, small size applications. It features a 16-bit 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. The AK4537 is available in a
52-QFN, utilizing less board space than competitive offerings.
FEATURES
1. Resolution : 16bits
2. Recording Function
• Stereo Mic Input
• Stereo Line Input
• 1st MIC Amplifier : +20dB or 0dB
• 2nd Amplifier with ALC
-8dB ∼ +27.5dB, 0.5dB Step (MIC input)
-23.5dB ∼ +12dB, 0.5dB Step (LINE input)
• ADC Performance : S/(N+D) : 79dB, DR, S/N : 83dB (MIC input)
S/(N+D) : 88dB, DR, S/N : 91dB (LINE input)
3. Playback Function
• Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz)
• Digital Volume (0dB ∼ -127dB, 0.5dB Step, Mute)
• Stereo Headphone-Amp
- S/(N+D) : 70dB, S/N : 90dB
- Output Power : 15mW@16Ω (HVDD=3.3V)
- Click Noise Free at Power ON/OFF
• Mono Speaker-Amp with ALC
- S/(N+D) : 64dB@150mW, S/N : 90dB
- BTL Output
- Output Power : 300mW@8Ω, THD+N=10% (HVDD=3.3V)
• Mono and Stereo Beep Inputs
• Mono Line Output
- Differential Output
- Performance : S/(N+D) : 89dB, S/N : 95dB
• Stereo Line Output
- Performance : S/(N+D) : 88dB, S/N : 92dB
4. Power Management
5. Master Clock
(1) PLL Mode
• Frequencies : 11.2896MHz, 12MHz and 12.288MHz
• Input Level : CMOS
(2) External Clock Mode
• Frequencies : 2.048MHz ∼ 12.288MHz
6. Output Master Clock Frequencies : 32fs/64fs/128fs/256fs
7. Sampling Rate :
(1) PLL mode
• 8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
(2) External Clock mode
• 8kHz ∼ 48kHz
8. Control mode: 4-wire Serial / I2C Bus
9. Master/Slave mode
MS0202-E-00
-1-
2003/2
1 page  
ASAHI KASEI
No. Pin Name
1 MICOUTL
2 MICOUTR
3
EXT
MICR
4 MPE
5 MPI
6 EXT
MICR
7 VCOM
8 AVSS
9 AVDD
10 PVDD
11 PVSS
12 VCOC
13 NC
14 CAD0
15 PDN
16 CSN
CAD1
17 CCLK
SCL
18 CDTI
SDA
19 CDTO
20 I2C
21 SDTI
22 SDTO
23 LRCK
24 BICK
25 MCKO
26 NC
[AK4537]
PIN/FUNCTION
I/O Function
O MIC-Amp Lch Output Pin
O MIC-Amp Rch Output Pin
I External Microphone Input Pin (Mono Input)
(PMMICR bit = “0”)
I Stereo Microphone Rch Input Pin
(PMMICR bit = “1”)
O MIC Power Supply Pin for External Microphone / Stereo Microphone Rch
O MIC Power Supply Pin for Internal Microphone / Stereo Microphone Lch
I Internal Microphone Input Pin (Mono Input)
(PMMICL bit = “0”)
I Stereo Microphone Lch Input Pin
(PMMICL bit = “1”)
O
Common Voltage Output Pin, 0.45 x AVDD
Bias voltage of ADC inputs and DAC outputs.
- Analog Ground Pin
- Analog Power Supply Pin
- PLL Power Supply Pin
- PLL Ground Pin
O
Output Pin for Loop Filter of PLL Circuit
This pin should be connected to PVSS with one resistor and capacitor in series.
- No Connect. No internal bonding.
I Chip Address 0 Select Pin
I
Power-Down Mode Pin
“H”: Power up, “L”: Power down reset and initializes the control register.
I Chip Select Pin (I2C = “L”)
I Chip Address 1 Select Pin (I2C = “H”)
I Control Data Clock Pin (I2C = “L”)
I Control Data Clock Pin (I2C = “H”)
I Control Data Input Pin (I2C = “L”)
I/O Control Data Input Pin (I2C = “H”)
O Control Data Output Pin (I2C = “L”)
I
Control Mode Select Pin
“H”: I2C Bus, “L”: 4-wire Serial
I Audio Serial Data Input Pin
O Audio Serial Data Output Pin
I/O Input / Output Channel Clock Pin
I/O Audio Serial Data Clock Pin
O Master Clock Output Pin
- No Connect. No internal bonding.
MS0202-E-00
-5-
2003/2
5 Page 
ASAHI KASEI
[AK4537]
FILTER CHARACTERISTICS
(Ta=−10 ∼ 70°C; AVDD, DVDD, PVDD, HVDD=2.4 ∼ 3.6V; fs=44.1kHz; DEM=OFF)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 22) ±0.1dB
PB
0
−1.0dB
- 20.0
−3.0dB
- 21.1
Stopband
SB 27.0
Passband Ripple
PR
Stopband Attenuation
SA 65
Group Delay
(Note 23)
GD
17.0
Group Delay Distortion
∆GD
0
ADC Digital Filter (HPF):
Frequency Response (Note 22) −3.0dB
FR
3.4
−0.5dB
10
−0.1dB
22
DAC Digital Filter:
Passband
(Note 22) ±0.1dB
PB
0
−6.0dB
- 22.05
Stopband
SB 24.1
Passband Ripple
PR
Stopband Attenuation
SA 43
Group Delay
(Note 23)
GD
16.8
DAC Digital Filter + SCF:
Frequency Response: 0 ∼ 20.0kHz
FR
±0.5
BOOST Filter:
(Note 24)
Frequency Response MIN 20Hz
FR
- 5.74
100Hz
- 2.92
1kHz
- 0.0
MID 20Hz
FR
- 5.94
100Hz
- 4.71
1kHz
- 0.14
MAX 20Hz
FR
- 16.04
100Hz
- 10.55
1kHz
- 0.3
max
17.4
-
-
±0.1
20.0
-
±0.06
-
-
-
-
-
-
-
-
-
Units
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
Hz
Hz
Hz
kHz
kHz
kHz
dB
dB
1/fs
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Note 22. The passband and stopband frequencies scale with fs (system sampling rate).
For example, ADC is PB=0.454*fs (@-1.0dB), DAC is PB=0.454*fs (@-0.01dB).
Note 23. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
16-bit data of both channels from the input register to the output register of the ADC. This time includes the group
delay of the HPF. For the DAC, this time is from setting the 16-bit data of both channels from the input register to
the output of analog signal.
Note 24. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips
to the full-scale.
MS0202-E-00
- 11 -
2003/2
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4537.PDF ] | |
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