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AK4551 Datasheet, PDF (4/15 Pages) Asahi Kasei Microsystems – LOW POWER & SMALL PACKAGE 20BIT CODEC | |||
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ASAHI KASEI
[AK4551]
ANALOG CHARACTERISTICS
(Ta=25°C; VDD=2.5V; fs=44.1kHz; Signal Frequency=1kHz; SCLK=64fs; Measurement frequency=10Hz ⼠20kHz;
unless otherwise specified)
Parameter
min
typ
max
Units
ADC Analog Input Characteristics: Analog Source Impedance=470⦠(Note 2)
Resolution
20
Bits
S/(N+D)
(-0.5dB Input)
72
82
dB
D-Range
(-60dB Input, A-weighted)
82
89
dB
S/N
(A-weighted)
82
89
dB
Interchannel Isolation
80
95
dB
Interchannel Gain Mismatch
0.2
0.5
dB
Input Voltage
(Note 3)
1.35
1.50
1.65
Vpp
Input Resistance
50
100
kâ¦
Power Supply Rejection
(Note 4)
35
dB
DAC Analog Output Characteristics:
Resolution
20
Bits
S/(N+D)
75
85
dB
D-Range
(-60dB Output, A-weighted)
86
92
dB
S/N
(A-weighted)
86
92
dB
Interchannel Isolation
80
95
dB
Interchannel Gain Mismatch
0.2
0.5
dB
Output Voltage
(Note 3)
1.35
1.50
1.65
Vpp
Load Resistance
10
kâ¦
Load Capacitance
30
pF
Power Supply Rejection
(Note 4)
50
dB
Power Supplies
Power Supply Current
AD+DA
PWAD = âHâ, PWDA =
10
15
mA
AD
DA
Power down (Note 5)
âHâ PWAD = âHâ, PWDA =
âLâ PWAD = âLâ, PWDA = âHâ
PWAD = âLâ, PWDA = âLâ
5.6
8.4
mA
5.6
8.4
mA
10
50
uA
Power Consumption
AD+DA
PWAD = âHâ, PWDA = âHâ
25
37.5
mW
AD
PWAD = âHâ, PWDA = âLâ
14
21
mW
DA
PWAD = âLâ, PWDA = âHâ
14
21
mW
Power down (Note 5) PWAD = âLâ, PWDA = âLâ
25
125
uW
Note 2. The offset of ADC is removed by internal HPF.
Note 3. Input /Output of ADC and DAC scales with VDD voltage. 0.6 X VDD (typ).
Note 4. PSR is applied to VDD with 1kHz, 50mV.
Note 5. In case of power-down mode, all digital input including clocks pins (MCLK, SCLK and LRCK) are held VDD or
VSS. But PWAD and PWDA pins are held VSS.
MS0029-E-00
-4-
2000/5
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