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PDF AK7722 Data sheet ( Hoja de datos )
| Número de pieza | AK7722 | |
| Descripción | 24bit 4ch ADC + 24bit 4ch DAC | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK7722]
AK7722
24bit 4ch ADC + 24bit 4ch DAC with Audio DSP
GENERAL DESCRIPTION
The AK7722 is a digital signal processor with an integrated 4ch 24bit DAC, a stereo ADC with input selector
and a 2ch input ADC. The integrated 4ch DAC, the 2ch ADC with input selector and the other 2ch ADC
feature high performance achieving 108dB, 96dB and 95dB, respectively. The integrated SRC has three
input selector enabling the DSP to operate in master mode with digital inputs. The audio DSP has
1536step/fs (at 48kHz sampling) parallel arithmetic operation performance and the 5k-word delay RAM
allows surround processing and time alignment adjusting. As the AK7722 is a RAM based DSP, it is
programmable for various user requirements. It is housed in an 80pin LQFP package.
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 36bit
- 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
[ADC1 Block]
- Stereo with 6 Inputs Selector
- DR, S/N: 96dB (fs = 48kHz, when differential input)
- S/(N+D): 90dB (fs = 48kHz)
- Differential & Single-ended Inputs
- Digital HPF (fc=1Hz)
- 6 Analog Inputs Selector (2 differential, 4 single-ended)
- Digital Volume Control (24dB ~ -103dB, 0.5dB Step, Mute)
[ADC2 Block]
- DR, S/N: 95dB (fs = 48kHz)
- Single-ended Inputs
- Digital Volume Control (24dB ~ -103dB, 0.5dB Step, Mute)
[SRC Block]
- 3 Pair of Stereo → 1 Stereo Pair Selector
- 2ch x 1 system
- Supporting frequency: Fin = 7.35kHz ~ 96kHz → Fout = 7.35kHz ~ 48kHz
(FSO/FSI = 0.167~ 6.0)
MS1328-E-00-PB
-1-
2011/09
1 page  
■ Ordering Guide
AK7722VQ
AKD7722
■ Pin Layout
-40 ∼ +85°C
80pin LQFP
Evaluation Board for AK7722
[AK7722]
AOUTR2N
AOUTR2P
AOUTL2N
AOUTL2P
AOUTR1N
AOUTR1P
AOUTL1N
AOUTL1P
AVDD
VCOM
VSS6
A2INR
A2INL
AINR6
AINL6
AINR5
AINL5
AINR4
AINL4
AINR3
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
80 pin LQFP
(TOP VIEW)
40 BICKO
39 LRCKO
38 CLKO
37 VSS3
36 DVDD
35 SDA
34 SO
33 SI / CAD0
32 SCLK / SCL
31 RQN / CAD1
30 RDY
29 SRIN1
28 SRBICK1
27 SRLRCK1
26 SDIN2 / JX1
25 SDIN1
24 BICKI
23 LRCKI
22 JX0
21 GP1
pin
Input
Output
I/O
Power
MS1328-E-00-PB
5
2011/09
5 Page 
[AK7722]
ANALOG CHARACTERISTICS (CODEC)
■ ADC Characteristics
1. ADC1
(Ta=25ºC; AVDD=DVDD=3.3V, BITCLK=64fs; Signal frequency 1kHz; Measurement frequency = 20Hz~20kHz
@fs=48kHz; CKM mode0 (CKM[2:0]=000); BITFS[1:0]=00(64fs); with Differential Input; in SRC reset, Unless
otherwise specified.)
Parameter
min typ max Unit
ADC
Resolution
24 Bits
Section Dynamic Characteristics
S/(N+D) (-1dBFS)
82 90
dB
Dynamic Range (A-weighted)
(Note 5)
88 96
dB
S/N (A-weighted)
88 96
dB
Inter-Channel Isolation (fin=1kHz) (Note 6)
90 110
dB
DC accuracy
Channel Gain Mismatch
0.0 0.3 dB
Analog Input
Input Voltage (Differential)
(Note 7)
±2.00
±2.20
±2.40
Vp-p
Input Voltage (Single-ended)
(Note 8)
2.00 2.20 2.40 Vp-p
Input Impedance
41 62
kΩ
Note 5. S/(N+D) when -60dB FS signal is applied.
Note 6. Inter-channel isolation between AINR and AINL with –1dB FS signal input.
Note 7. AINL1P, AINL1N, AINR1P, AINR1N, AINL2P, AINL2N, AINR2P and AINR2N pins
Note 8. AINL3, AINR3, AINL4, AINR4, AINL5, AINR5, AINL6 and AINR6 pins.
Full scale output voltage is FS=AVDD×2.2/3.3.
2. ADC2
(Ta=25ºC; AVDD=DVDD=3.3V, BITCLK=64fs; Signal frequency 1kHz; Measurement frequency =20Hz~20kHz
@fs=48kHz; CKM mode0 (CKM[2:0]=000); BITFS[1:0]=00(64fs); in SRC reset, Unless otherwise specified.)
Parameter
min typ
max Unit
ADC
Resolution
24 Bits
Section Dynamic Characteristics
S/(N+D) (-1dBFS)
80 88
dB
Dynamic Range (A-weighted)
(Note 9)
87
95
dB
S/N (A-weighted)
87 95
dB
Inter-Channel Isolation (fin=1kHz) (Note 10)
90 110
dB
DC accuracy
Channel Gain Mismatch
0.1 0.3 dB
Analog Input
Input Voltage
(Note 11)
2.00 2.20 2.40 Vp-p
Input Impedance
41 62
kΩ
Note 9. S/(N+D) when -60dB FS signal is applied.
Note 10. Inter-channel isolation between AINR and AINL with –1dB FS signal input.
Note 11. Full scale output voltage is FS=AVDD×2.2/3.3.
MS1328-E-00-PB
11
2011/09
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AK7722.PDF ] | |
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