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PDF AK7752 Data sheet ( Hoja de datos )
| Número de pieza | AK7752 | |
| Descripción | Audio/Hands Free DSP | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK7752]
AK7752
Audio/Hands Free DSP with Stereo CODEC
GENERAL DESCRIPTION
The AK7752 is a digital signal processor with an integrated stereo CODEC. The digital signal processor
(DSP) can execute a high-quality hands-free algorithm, using only internal memory. Fine tuning is
available for improving voice quality of the hands-free function in actual user environments. The
AK7752 includes delay RAM, an integrated PLL, four digital audio input and eight digital audio output
ports. The AK7752 can perform pre and post processing for speech recognition, volume control
adjustment and parametric equalization, executed by programs downloaded via the microprocessor
interface.
FEATURES
[ADC Block]
Sampling rate: 8kHz ~ 48kHz
24-bit stereo
S/(N+D): 86dB
DR, S/N: 89dB (fs=8 kHz), 91dB (fs=48kHz)
Integrated DC offset canceling High Pass Filter
[DAC Block]
Sampling rate: 8kHz ~ 48kHz
18-bit stereo
S/(N+D): 90dB (fs =8kHz), 88dB (fs=48kHz)
DR, S/N: 95dB (fs =8kHz), 95dB (fs=48kHz)
[Input/Output Digital Interface]
4-channel Serial Data Input
8-channel Serial Output
[General]
Integrated PLL
EEPROM (AK6514C) Interface
Microprocessor Interface: I²C BUS or AKM original mode
Power Supply: Single 3.3V ±0.3V
Operating Temperature Range: -40°C~85°C
64pin LQFP
MS0578-E-01-PB
-1-
2007/09
1 page  
[AK7752]
No. Pin Name I/O
Function
Classification
18 DLINE_IN
HF Serial Data Input Pin ( Internal pull-down )
Digital Section
I Compatible with MSB / LSB justified 24, 20 and 16 bits. Normally connected Serial Input
to Bluetooth line (receiving).
Data
Digital Section
19
DEXT_IN/
JX3
HF Serial Data Input Pin ( Internal pull-down )
Serial Input
I Compatible with MSB / LSB justified 24, 20 and 16 bits. This pin changes to Data /
a conditional jump pin (JX3) by setting control register (JX3_E) to “1”.
Conditional
Input
20 JX2
I
Conditional Jump Pin2 (Internal pull-down)
A conditional jump pin (JX2) is available by setting control register (JX2_E)
to “1”.
Conditional
Input
Conditional Jump Pin1 (Internal pull-down)
21 JX1
I A conditional jump pin (JX1) is available by setting control register (JX1_E)
to “1”.
22 JX0
Conditional Jump Pin0 (Internal pull-down)
I A conditional jump pin (JX2) is available by setting control register (JX0_E)
to “1”.
23 DVDD
- Power Supply for Digital Section (3.3V typical)
Digital
24 DVSS
- Ground Pin for Digital Section 0V
Power Supply
25 BITCLK_I
I
Serial Bit Clock Input Pin
Normally connected to the Bluetooth Data Clock line (256kHz/512kHz).
System Clock
26
SYNC_I
I
SYNC Input Pin
Normally connected to the Bluetooth Sync Clock line (8kHz).
Reset Pin (for initialization)
27 INIT_RESET_N I Use to initialize the AK7752. When changing CKM [3:0] and changing XTI Reset
or BITCLK_I input frequency, it is necessary to set this pin.
Clock Reset Pin
28 CK_RESET_N I
When changing CKM[3:0] and XTI or BITCLK_I input frequency without
using INIT_RESET_N, it is necessary to set this pin. The control register
CKRST has the same function.
29 S_RESET_N I System Reset N Pin
30 CKM[3]
I Clock Mode Select Pin 3
Mode Select
31 CKM[2]
I Clock Mode Select Pin 2
32
CLKO1
O
Clock Output Pin 1
The output frequency is selected by a control register.
Clock Output
MS0578-E-01-PB
-5-
2007/09
5 Page 
[AK7752]
(2) DC Characteristics
(Ta=-40°C ~ 85°C; AVDD, DVDD=3.0 ~ 3.6V)
Parameter
Symbol
min typ max Units
High Level Input Voltage
(Note 17)
Low Level Input Voltage
(Note 17)
SCL, SDA High Level Input Voltage
SCL, SDA Low Level Input Voltage
High Level Output Voltage Iout=-100μA (Note 18)
Low Level Output Voltage Iout=100μA
SDA Low Level Output Voltage Iout=3mA
Input Leak Current
(Note 19)
Input Leak Current (pull-down pin) (Note 20)
Input Leak Current (XTI pin)
VIH
VIL
VIH
VIL
VOH
VOL
VOL
Iin
Iid
Iix
80%VDD
70%VDD
VDD-0.5
20%VDD
30%VDD
0.5
0.4
±10
22
26
V
V
V
V
V
V
V
μA
μA
μA
Note 17. SCL and SDA pins are not included. (SI, SCLK pins are included)
Note 18. SDA pin is not included.
Note 19. Pull-down pins and XTI pin are not included.
Note 20. EESO, DLINE_IN, DEXT_IN / JX3, JX2, JX1, JX0, EESEL, I2CSEL, TESTI2 and TESTI1 (Typ150kΩ)
(3) Current Consumption
(Ta=25°C; AVDD, DVDD=3.0~3.6V (typ = 3.3V, max = 3.6V)
Parameter
min
Power Supply Current (Note 21)
AVDD
DVDD
AVDD + DVDD
typ
10
90
100
max Units
mA
mA
165 mA
Note 21. The current of DVDD changes depending on the system frequency and contents of the DSP program.
MS0578-E-01-PB
- 11 -
2007/09
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet AK7752.PDF ] | |
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