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PDF AK4687 Data sheet ( Hoja de datos )
| Número de pieza | AK4687 | |
| Descripción | Asynchronous Stereo Audio CODEC | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK4687]
AK4687
Asynchronous Stereo CODEC with Capless Stereo Selector
GENERAL DESCRIPTION
The AK4687 is a stereo audio CODEC with 2-channel input selector and a line driver. The interfaces of
ADC/DAC can accept up to 24bit input data and support asynchronous operation. The input range of the
pre-amplifier, that supports 3ch stereo inputs, is selectable by external resistors. Both the input stereo
selector and output drivers support ground reference 2Vrms In/Output, making it possible to remove
AC-coupling capacitors and reducing external parts. The AK4687 has a dynamic range of 99dB for ADC,
105dB for DAC. It is well suitable for digital recording systems, digital TVs, Blu-ray recorders and Home
theater systems.
FEATURES
Asynchronous ADC/DAC Operation
3:1 Capless Stereo Line Input Selector
24bit Stereo ADC
- 64x Oversampling
- Sampling Rate up to 48kHz
- Linear Phase Digital Anti-Alias Filter
- S/(N+D): 83dB
- Dynamic Range, S/N: 99dB
- Digital HPF for Offset Cancellation
24bit Two Stereo DAC
- 128x Oversampling
- Sampling Rate up to 192kHz
- 24bit 8 times Digital Filter
- S/(N+D): 95dB
- Dynamic Range, S/N: 105dB
- De-emphasis Filter
High Jitter Tolerance
External Master Clock Input:
256fs, 384fs, 512fs 768fs (fs=32kHz ∼ 48kHz)
128fs, 192fs, 256fs 384fs (fs=64kHz ∼ 96kHz)
128fs, 192fs (fs=128kHz ~ 192kHz)
2 Audio Serial I/F (PORT1, PORT2)
- Master/Slave mode (PORT1)
- I/F format
PORT2: MSB, LSB justified (16/24 bit), I2S
PORT1: MSB, LSB justified (16/24 bit), I2S
Hardware / I2C-bus Control
Operating Voltage:
- Digital I/O and Charge Pump: 3.0V ∼ 3.6V
- ADC Analog: 3.0V ∼ 3.6V
- DAC Analog: 3.0V ∼ 3.6V
Package: 48pinLQFP
MS1307-E-00
-1-
2011/05
1 page  
[AK4687]
PIN/FUNCTION (Continued)
No. Pin Name I/O
Function
46 I2C
I
I2C Pin
“H”= I2C control, “L”= H/W control
47
SDA
AIN1
I/O Control Data Pin (I2C pin = “H”)
I Analog Input Select Pin (I2C pin = “L”)
48
SCL
AIN0
I Control Data Clock Pin (I2C pin = “H”)
I Analog Input Select Pin (I2C pin = “L”)
Note: All digital input pins must not be left floating.
ABSOLUTE MAXIMUM RATINGS
(VSS1=VSS2=VSS3=VSS4 =VSS5=0V; Note 1)
Parameter
Symbol
min max
Power Supply
DVDD
AVDD1
AVDD2
-0.3 4.0
-0.3 4.0
-0.3 4.0
Input Current (any pins except for supplies)
Digital Input Voltage
(MCLK1-2, PDN1-2, LRCK1-2, SDTI,
BICK1-2, SDA, SCL, MSN, CAD0 pins)
IIN
VIND
- ±10
-0.3 DVDD+0.3
Analog Input Voltage
(LIN1-3, RIN1-3 pins)
VINA
-0.3 AVDD1+0.3
Ambient Operating Temperature
Ta -20 85
Storage Temperature
Tstg -65 150
Note 1. VSS1, VSS2, VSS3, VSS4 and VSS5 must be connected to the same analog ground plane.
Units
V
V
V
mA
V
V
°C
°C
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(VSS1=VSS2=VSS3=VSS4=VSS5= 0V; Note 1)
Parameter
Symbol min typ max Units
Power Supply (Note 2)
DVDD
3.0 3.3 3.6 V
AVDD1 3.0 3.3 3.6 V
AVDD2 3.0 3.3 3.6 V
Note 2. The AVDD1, AVDD2 and CVDD must be the same voltage.
The voltage difference between DVDD and other voltages (AVDD1, AVDD2 and CVDD) must be less than 0.3V.
*AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
MS1307-E-00
-5-
2011/05
5 Page 
■ Timing Diagram
MCLK
LRCK
1/fCLK
tCLKH
tCLKL
1/fsn, 1/fsd, 1/fsq
BICK
tBCK
tBCKH
tBCKL
Clock Timing (Normal mode)
LRCK
BICK
tBLR
tLRB
tLRS
SDTO
SDTI
tSDS
tSDH
Audio Interface Timing
[AK4687]
VIH
VIL
VIH
VIL
VIH
VIL
VIH
VIL
tBSD
VIH
VIL
50% TVDD
VIH
VIL
LRCK= LRCK1, LRCK2
BICK= BICK1, BICK2
MS1307-E-00
- 11 -
2011/05
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK4687.PDF ] | |
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