C371347_139780418F8DFE40697A24CD62AD2CE5.pdf - 第22页
CM108B USB Audio Single C hip Datasheet Revision: 1.11 www .cmedia.com.tw P age 22 / 24 Copyright© C -Media Electr onics Inc. 9 Package informati on 48 -Lead Thin Plastic Quad Flatpack ( LQFP) Symbol Dimensions in mm Min…
CM108B
USB Audio Single Chip
Datasheet Revision: 1.11 www.cmedia.com.tw
Page 21 / 24 Copyright© C-Media Electronics Inc.
Volume Control Level
-37
-
0
dB
Volume Control Step
-
38
-
Steps
ADC
Resolution
-
16
-
bit
THD + N (-3dBr) @1KHz
-
-84
-
dB
SNR
-
90
-
dB
Dynamic range
-
88.5
-
dB
Frequency response 48KHz
100
-
20K
Hz
Frequency response 44.1KHz
100
-
20K
Hz
Input range
0
-
2.88
Vpp
Microphone Input
Boost gain
-
12/22 (EEPROM)
-
dB
Gain Adjustment Initial Value
8
dB
Gain adjustment range
-12
-
23
dB
Gain adjustment steps
-
36
-
Steps
Mixer Gain Initial Value
-7
dB
Mixer gain adjustment
-23.0
-
8.0
dB
Mixer gain adjustment steps
-
32
-
Steps
CM108B
USB Audio Single Chip
Datasheet Revision: 1.11 www.cmedia.com.tw
Page 22 / 24 Copyright© C-Media Electronics Inc.
9 Package information
48-Lead Thin Plastic Quad Flatpack (LQFP)
Symbol
Dimensions in mm
Minimum
Normal
Maximum
A
8.90
－
9.10
B
6.90
－
7.10
C
8.90
－
9.10
D
6.90
－
7.10
E
－
0.50
－
F
－
0.20
－
G
1.35
－
1.45
H
－
－
1.60
I
－
0.10
－
J
0.45
－
0.75
K
0.10
－
0.20
α
0°
－
7°
Note: Outline Dimensions are shown in millimeters
CM108B
USB Audio Single Chip
Datasheet Revision: 1.11 www.cmedia.com.tw
Page 23 / 24 Copyright© C-Media Electronics Inc.
Reference
USB specification 1.1 and 2.0-compliant
USB audio device class specification 1.0-compliant
USB human interface device class specification 1.11-compliant