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参数资料
| 型号： | TAS5518PAGR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 27/105页 |
| 文件大小： | 1514K |
| 代理商： | TAS5518PAGR |
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Introduction
20
SLES115 — August 2004
TAS5518
For 176.4 kHz and 192 kHz data, the TAS5518 has two Bass and Treble tone controls. Each control has a
±18-dB I2C control range with selectable corner frequencies and 2nd order slopes. These controls operate
two channel groups:
L & R
Sub
The bass and treble filters utilize a soft update rate that does not produce artifacts during adjustment.
Table 14. Bass and Treble Filter Selections
FS
(kHz)
3-dB CORNER FREQUENCIES
FILTER
SET 1
FILTER
SET 1
FILTER
SET 2
FILTER
SET 2
FILTER
SET 3
FILTER
SET 3
FILTER
SET 4
FILTER
SET 4
FILTER
SET 5
FILTER
SET 5
BASS
TREBLE
BASS
TREBLE
BASS
TREBLE
BASS
TREBLE
BASS
TREBLE
32
42
917
83
1833
125
3000
146
3667
167
4333
38
49
1088
99
2177
148
3562
173
4354
198
5146
44.1
57
1263
115
2527
172
4134
201
5053
230
5972
48
63
1375
125
2750
188
4500
219
5500
250
6500
88.2
115
2527
230
5053
345
8269
402
10106
459
11944
96
125
2750
250
5500
375
9000
438
11000
500
13000
176.4
230
5053
459
10106
689
16538
804
20213
919
23888
192
250
5500
500
11000
750
18000
875
22000
1000
26000
The I2C registers that control Bass and Treble are:
Bass and Treble By-Pass Register (0x89 – 0x90, channels 18)
Bass and Treble Slew Rates (0xD0)
Bass Filter Sets 15 (0xDA)
Bass Filter Index (0xDB)
Treble Filter Sets 15 (0xDC)
Treble Filter Index (0xDD)
1.9
Volume, Auto Mute, and Mute
The TAS5518 provides individual channel and master volume controls. Each control provides an adjustment
range of +18.0618 dB to –100 dB in 0.25 dB increments. This permits a total volume device control range of
+36 dB to –100 dB plus mute. The master volume control can be configured to control six or eight channels.
The TAS5518 has a master soft mute control that can be enabled by a terminal or I2C command. The device
also has individual channel soft mute controls that can are enabled via I2C.
The soft volume and mute update rates are programmable. The soft adjustments are performed using a soft
gain linear update with an I2C programmable linear step size at a fixed temporal rate. The linear soft gain step
size can be varied from 0.5 to 0.003906.
Table 15. Linear Gain Step Size
STEP SIZE (GAIN)
0.5
0.25
0.125
0.0625
0.03125
0.015625
0.007813
0.003906
Time to go from 36.124 db to 127 dB in ms
10.67
21.33
42.67
85.34
170.67
341.35
682.70
1365.4
Time to go from 18.062 db to 127 dB in ms
1.33
2.67
5.33
10.67
21.33
42.67
85.33
170.67
Time to go from 0 db to 127 dB in ms
0.17
0.33
0.67
1.33
2.67
5.33
10.67
21.33
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