alc268 Realtek Semiconductor Corporation, alc268 Datasheet - Page 72

• Manufacturer Part Number: alc268
• Description: 2+2 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

9.3. Analog Performance
2+2 Channel High Definition Audio Codec
Standard Test Conditions
Parameter
Full-Scale Input Voltage
Full-Scale Output Voltage
Dynamic Range with 1kHz Tone, DR (A Weighted)
Total Harmonic Distortion Plus Noise, THD+N
Frequency Response
Power Supply Rejection Ratio
Total Out-of-Band Noise (28.8kHz~100kHz)
Amplifier Gain Step
Crosstalk Between Input Channels
Input Impedance (Gain=0dB)
Output Impedance
Digital Power Supply Current (Normal Operation)
DVDD=3.3V, DVDD-IO=3.3V
Digital Power Supply Current (Power Down Mode)
DVDD=3.3V, DVDD-IO=3.3V
Analog Power Supply Current (Normal Operation)
Analog Power Supply Current (Power Down Mode)
VREFOUTx Output Voltage
VREFOUTx Output Current
Note: FSA=Full-Scale with A-weighting filter.
All ADC (Gain=0dB)
All DAC (Gain=0dB)
ADC
DAC
ADC
DAC
Headphone Out @32Ω Load
ADC (-3dB Lower Edge, -1dB Higher Edge)
DAC (-3dB Lower Edge, -1dB Higher Edge)
ADC
DAC
AVDD1, AVDD2=5.0V
AVDD1, AVDD2=3.3V
AVDD1, AVDD2=5.0V
Amplified Output
Non-Amplified Output
• T
• 1kHz input sine wave; Sampling frequency=48kHz; 0dB=1Vrms
• 10KΩ/50pF load; Test bench Characterization BW:10Hz~22kHz
Table 81. Analog Performance
ambient
=25
o
FS=Full-Scale.
C, DVDD-CORE=3.3V ±5%, AVDD=5.0V±5%
64
Min
10
10
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2.50
Typ
200
-85
-92
-80
-40
-60
-80
1.1
1.4
1.5
1.0
90
95
47
25
35
19
1
5
-
-
-
-
Track ID: JATR-1076-21
0.454*Fs
0.454*Fs
Max
4.20
400
700
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ALC268 Series
dB FSA*
Datasheet
dB FSA
dB FS*
dB FS
dB FS
Vrms
Vrms
Units
KΩ
mA
mA
mA
mA
Hz
Hz
dB
dB
dB
µA
µA
dB
dB
Ω
Ω
V
Rev. 1.3