[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
Resolution
Dynamic characteristics
S/(N+D) fs = 48kHz (-1dB)
Dynamic range fs = 48kHz (A filter) (Note2)
24
Bits
ADC
Section
(Note1)
80
90
90
90
89
98
dB
dB
dB
dB
S/N
fs = 48kHz (A filter)
98
Inter-channel isolation (f =1kHz)
DC accuracy
(Note3)
110
Inter-channel gain mismatching
Analog input
0.1
0.3
dB
Input voltage (Differencial)
Input Voltage (Single-ended)
Input impedance
(Note4)
(Note5)
(Note6)
Vp-p
Vp-p
kΩ
±1.85
1.85
15
±2.00
2.00
33
±2.15
2.15
Resolution
24
Bits
DAC
Section
Dynamic characteristics
S/(N+D)
fs = 48kHz (0dB)
80
90
90
90
89
97
dB
dB
dB
dB
Dynamic range fs = 48kHz (A filter) (Note2)
S/N
fs = 48kHz (A filter)
97
Inter-channel isolation (f =1kHz)
DC accuracy
(Note7)
(Note7)
(Note8)
105
Inter-channel gain mismatching
Analog output
Output voltage
Load resistance
0.2
0.5
dB
1.85
10
2.00
2.15
Vp-p
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
AKM [ ASAHI KASEI MICROSYSTEMS ]
