AK7740ET Datasheet, PDF (8/48 Pages) Asahi Kasei Microsystems – 24bit 2ch ADC + 24bit 4ch DAC with Audio DSP

[ASAHI KASEI]
[AK7740ET]
7. Electric Characteristics
(1) Analog characteristics
(Unless otherwise specified, Ta = 25°C; AVDD, DVDD = 3.3V; VREFH = AVDD;
BITCLK = 64 fs; Signal frequency 1kHz;
Measurement bandwidth = 20Hz to 20kHz @ 48kHz;
DSP section in reset state; ADC with all differential inputs)
Parameter
Min
Typ
Max
Unit
ADC
Resolution
Section Dynamic characteristics
24
Bits
S/(N+D) fs = 48kHz (-1dB)
(Note1)
80
89
dB
Dynamic range fs = 48kHz (A filter) (Note2)
90
98
dB
S/N
fs = 48kHz (A filter)
90
98
dB
Inter-channel isolation (f =1kHz) (Note3)
90
110
dB
DC accuracy
Inter-channel gain mismatching
0.1
0.3
dB
Analog input
Input voltage (Differencial)
(Note4)
±1.85
±2.00
±2.15
Vp-p
Input Voltage (Single-ended)
(Note5)
1.85
2.00
2.15
Vp-p
Input impedance
(Note6)
15
33
kΩ
DAC
Resolution
24
Bits
Section Dynamic characteristics
S/(N+D) fs = 48kHz (0dB)
80
89
dB
Dynamic range fs = 48kHz (A filter) (Note2)
90
97
dB
S/N
fs = 48kHz (A filter)
90
97
dB
Inter-channel isolation (f =1kHz) (Note7)
90
105
dB
DC accuracy
Inter-channel gain mismatching (Note7)
0.2
0.5
dB
Analog output
Output voltage
(Note8)
1.85
2.00
2.15
Vp-p
Load resistance
10
kΩ
Note: 1. Specification only guaranteed for differential inputs
2. Indicates S/(N+D) when -60dB signal is applied
3. Specified for L and R of each input selector
4. Applies to AINL+, AINL-, AINR+ and AINR-
Fullscale (∆AIN = (AIN+) - (AIN-)) can be represented by (±FS = ±(VREFH-AVSS)×(2.0/3.3))
5. Applies to AINL1,AINR1,AINL2,AINR2,AINL3,AINR3,AINL4 and AINR4
Fullscale single-ended input is (FS=(VREFH-AVSS) × (2.0/3.3))
6. Applies to AINL1, AINR1, AINL2, AINR2, AINL3, AINR3, AINL4, AINR4, AINL+, AINL-,
AINR+ and AINR-
7. Specified for L and R of each DAC.
8. Fullscale output voltage when VREFH=AVDD
<Pre-E-01>
-8-
2006/10