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PDF AK7734 Data sheet ( Hoja de datos )
| Número de pieza | AK7734 | |
| Descripción | Audio DSP | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK7734]
AK7734
Audio DSP with 2-Channel ADC/SRC
GENERAL DESCRIPTION
The AK7734 is a highly integrated audio digital signal processor with integrated 2ch 24bit ADC and 2ch SRC.
It includes internal memories for digital audio processing, that allows surround effect process, time alignment
and parametric equalizing. More over, the AK7734 can process both data and filter coefficients as floating
point data so that high accuracy IIR/FIR filter performance can be achieved easily. The internal SRC has
various sampling rate converting modes, corresponds many sampling rates without changing the DSP
operating sampling frequency. The AK7734 can operate a hands-free software by AKM, as well as sound
processing, by programs downloaded via the microprocessor interface.
FEATURES
[DSP Block]
- Word length: 24bit (Coefficient RAM & Data RAM: F24 floating point)
- Processing Speed: 13.6 ns (1536step/fs; fs = 48kHz)
- Multiplication: 20 x 24 → 44-bit Double precision arithmetic available
- Divider 20 / 20 → 20bit
- ALU: 48bit arithmetic operation (overflow margin 4bit) 20bit floating point arithmetic
and logic operation
- Program RAM: 3072 x 24bit
- Coefficient RAM: 2048 x 24bit (F24 floating point)
- Data RAM: 2048 x 24-bit (F24 floating point)
- Offset Register: 64 x 13bit
- Delay RAM1: 3072 x 24-bit
- Delay RAM2: 2048 x 24-bit
- Sampling rate: fs= 7.35k ~ 48kHz
- Master Clock: 1536fs
(generated from 32fs, 48fs, 64fs, 128fs, 256fs, 384fs by internal PLL)
- Master/Slave Operation
[ADC Block]
- 64 times Over sampling
- 24bit 2ch
- Sampling rate: 7.35 ~ 48kHz
- S/(N+D): 83dB (fs = 48kHz)
- DR, S/N: 96dB (fs = 48kHz)
- Integrated DC offset canceling High Pass Filter
[SRC Block]
- 2ch x 1 system
- Support frequency: Fin = 7.35kHz ~ 96kHz → Fout = 7.35kHz ~ 48kHz
(FSO/FSI = 0.167~ 6.0)
[Digital Interface Input/Output]
- 8ch Serial Data Input
- 8ch Serial Data Output
MS1033-E-02-PB
-1-
2010/01
1 page  
■ Ordering Guide
AK7734XQ
AKD7734
■ Pin Layout
-40 ∼ +85°C
48pin LQFP
Evaluation Board for AK7734
[AK7734]
SRCLFLT
VSS4
DVDD
CKM [3]
SETSRC
TESTI2
AINR
AINL
AVDD
VCOM
VSS5
LFLT
37
38
39
40
41
42
43
44
45
46
47
48
48pin LQFP
(TOP VIEW)
24 CLKO
23 BITCLKO
22 LRCLKO
21 CKM [0]
20 INITRSTN
19 I2CSEL
18 DVDD
17 VSS2
16 SDOUT1
15 SDOUT2
14 SDOUT3
13 SDOUT4
Note) XXXX is internal pull-down pin. XXXX is the pin name.
pin
Inpu t
Out put
I/O
Power
MS1033-E-02-PB
5
2010/01
5 Page 
[AK7734]
(2) SRC
(Ta=25ºC; AVDD = DVDD=3.3V; VSS=0V, data = 24bit; measurement bandwidth = 20Hz~ FSO/2; unless otherwise
specified.)
Parameter
Symbol min typ max Units
Resolution
24 Bits
Input Sample Rate
FSI 7.35
96 kHz
Output Sample Rate
FSO 7.35
48 kHz
THD+N
(Input= 1kHz, 0dBFS)
FSO/FSI=44.1kHz/48kHz
-112 dB
FSO/FSI=44.1kHz/96kHz
-104 dB
FSO/FSI=48kHz/44.1kHz
-112 dB
FSO/FSI=48kHz/96kHz
-112 dB
FSO/FSI=48kHz/8kHz
-111 -103 dB
FSO/FSI=8kHz/48kHz
-113 dB
FSO/FSI=8kHz/44.1kHz
-78 dB
Dynamic Range (Input= 1kHz, -60dBFS)
FSO/FSI=44.1kHz/48kHz
113 dB
FSO/FSI=44.1kHz/96kHz
113 dB
FSO/FSI=48kHz/44.1kHz
113 dB
FSO/FSI=48kHz/96kHz
113 dB
FSO/FSI=48kHz/8kHz
109 112
dB
FSO/FSI=8kHz/48kHz
113 dB
FSO/FSI=8kHz/44.1kHz
113 dB
Dynamic Range (Input= 1kHz, -60dBFS, A-weighted
FSO/FSI=44.1kHz/48kHz
115 dB
Ratio between Input and Output Sample Rate
FSO/FSI 0.167
6-
(3) DC Characteristics
(Ta=-40ºC~85ºC; AVDD=DVDD=3.0~3.6V)
Parameter
High Level Input Voltage
(Note 11)
Low Level Input Voltage
(Note 11)
SCL,SDA High Level Input Voltage
SCL,SDA Low Level Input Voltage
High Level Output Voltage Iout=-100μA
Low Level Output Voltage Iout=100μA (Note 12)
SDA Low Level Output Voltage Iout=3mA
Input Leak Current
Input Leak Current (pull-down pin)
Input Leak Current (XTI pin)
(Note 13)
(Note 14)
Symbol
VIH
VIL
VIH
VIL
VOH
VOL
VOL
Iin
Iid
Iix
min
80%DVDD
70%DVDD
DVDD-0.5
Note 11. SCL and SDA pins are not included. (SCLK pins are included)
Note 12. SDA pin is not included.
Note 13. Pull-down pins, and the XTI pin is not included.
Note 14. TESTI1 and TESTI2 pins are internal pulled-down pin. (Typ150kΩ)
typ
22
26
max
20%DVDD
30%DVDD
0.5
0.4
±10
Units
V
V
V
V
V
V
V
μA
μA
μA
MS1033-E-02-PB
11
2010/01
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet AK7734.PDF ] | |
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