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参数资料
| 型号： | TMS57014ADWBLE |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | DUAL, SERIAL INPUT LOADING, 18-BIT DAC, PDSO28 |
| 封装： | PLASTIC, SOIC-28 |
| 文件页数： | 14/17页 |
| 文件大小： | 250K |
| 代理商： | TMS57014ADWBLE |
TMS57014A
DUAL AUDIO DIGITAL-TO-ANALOG CONVERTER
SLAS077D – SEPTEMBER 1993 – REVISED NOVEMBER 1995
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
de-emphasis filter (continued)
0
10
–10
Response
–
dB
De-emphasis
3.18
(50
s)
10.6
(15
s)
Frequency – kHz
Figure 4. De-emphasis Characteristics
digital attenuation
A value selected in the internal attenuation register determines the attenuation of the digital-audio-data input.
The attenuation value is 11 bits long with a valid range of hex values from 400h to 000h. A data value of 001h
corresponds to an attenuation value of – 60 dB and a data value of 400h corresponds to 0 dB. The attenuation
function is nonlinear (see equation 1). Figure 5 illustrates the attenuation function in dB. The default attenuation
value is 400h.
Attenuation
+ 20 log attenuation data
1024
(1)
0
–10
–20
–30
–40
–50
–60
1024 896
768
640
512
384
256
128
0
Attenuation
–
dB
Attenuation Data (decimal values)
Figure 5. Digital Attenuation Characteristics
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