C371346_375F2440A66FD1C882296D07948AE54C.pdf - 第23页
CM 108AH Highly Integrated USB Audio I/O Controller www .cmedia.com.tw Copyright© C-Media Electro nics Inc. R ev . 2.1 ︱ P age 23/27 8.3 Electrical P ar ameters Min. Typ. M ax . Unit DAC (10K Ohm Loading) Resolution - 16…
CM108AH
Highly Integrated USB Audio I/O Controller
www.cmedia.com.tw
Copyright© C-Media Electronics Inc. Rev. 2.1︱ Page 22/27
8 Electrical Characteristics
8.1 Absolute Maximum Rating
Symbol
Parameters
Value
Unit
Dvmin
Min. digital supply voltage
– 0.3
V
Dvmax
Max. digital supply voltage
+ 6
V
Avmin
Min. analog supply voltage
– 0.3
V
Avmax
Max. analog supply voltage
+ 6
V
Dvinout
Voltage on any digital input or output pin
–0.3 to +5.5
V
Avinout
Voltage on any analog input or output pin
–0.3 to +5.5
V
TBstgB
Storage temperature range
-40 to +125
P0PC
ESD (HBM)
ESD human body mode
4000
V
ESD (MM)
ESD machine mode
200
V
Latch Up
JEDEC standard no.78, Mar. 1997
200
mA
8.2 Operation Conditions
Operation conditions
Min
Typ
Max
Unit
Analog supply voltage
4.5
5.0
5.5
V
Digital supply voltage
4.5
5.0
5.5
V
Total power consumption
-
35
mA
Suspend-mode power consumption
-
500
uA
Operating ambient temp.
-15
-
70
PoPC
CM108AH
Highly Integrated USB Audio I/O Controller
www.cmedia.com.tw
Copyright© C-Media Electronics Inc. Rev. 2.1︱ Page 23/27
8.3 Electrical Parameters
Min.
Typ.
Max.
Unit
DAC (10K Ohm Loading)
Resolution
-
16
-
Bits
THD + N (-3dBr)
-
-74.29
-
dB
SNR
-
93.6
-
dB
Silent SNR
-
98.2
-
dB
Dynamic range
-
93.8
-
dB
Frequency response 48KHz
20
-
20K
Hz
Frequency response 44.1KHz
20
-
20K
Hz
Output voltage (rms)
-
1.25
-
Vrms
Output voltage swing
0.5
-
4.0
V
DAC (32 Ohm loading)
Resolution
-
16
-
Bits
THD + N (-3dBr)
-
-71.1
-
dB
SNR
-
93.7
-
dB
Silent SNR
-
98.2
-
dB
Dynamic range
-
93.8
-
dB
Frequency response 48KHz
20
-
20K
Hz
Frequency response 44.1KHz
20
-
20K
Output voltage (rms)
-
1.25
-
Vrms
Output voltage swing
0.5
-
4.0
V
ADC
Resolution
-
16
-
bit
THD + N (-3dBr)
-
-76.1
-
dB
SNR
-
83.1
-
dB
Dynamic range
-
81.6
-
dB
Frequency response 48KHz
20
-
19.2K
Hz
Frequency response 44.1KHz
20
-
17.6K
Hz
Input range
0
-
2.88
Vpp
Amplification
Volume control level
-45
-
0
dB
Volume control step
-
38
-
Steps
Microphone Input
Boost gain
-
+22.5
-
dB
Gain adjustment range
0
-
22.5
dB
Gain adjustment steps
-
16
-
Steps
Mixer gain adjustment
-33.0
-
12.0
dB
Mixer gain adjustment steps
-
32
-
Steps
CM108AH
Highly Integrated USB Audio I/O Controller
www.cmedia.com.tw
Copyright© C-Media Electronics Inc. Rev. 2.1︱ Page 24/27
9 Audio Quality Graphs
9.1 Line Out Frequency Response @ 48KHz Sample Rate (10K Ohm Loading)
Audio Precision 09/26/08 14:33:51
Vista-Frequency Response-M48k.at27
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Cyan Solid 1 Fasttest.Ch.1 Ampl!Normalize Left
1 2 Yellow Solid 1 Fasttest.Ch.2 Ampl!Normalize Left
-6
+1
-5
-4
-3
-2
-1
+0
-3.143
-0.01
d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
19.998k
Hz
dx=-19.980 kHz
dy=-3.132 dB
9.2 Line Out THD+N @ 48KHz sample rate (10K Ohm Loading)
Audio Precision 09/26/08 14:27:07
Vista-D-A THD+N.at27
ColorSweep Trace Line Style Thick Data Axis Comm ent
1 1 Cyan Solid 2 Anlr.THD+N Ampl Left
1 2 Yellow Solid 2 Anlr.THD+N Ampl Left
-120
+0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k50 100 200 500 1k 2k 5k 10k
Hz