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TAS5518 Datasheet(PDF) 29 Page - Texas Instruments |
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TAS5518 Datasheet(HTML) 29 Page - Texas Instruments |
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29 / 102 page  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 1−4. 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 1−8) • Bass and Treble Slew Rates (0xD0) • Bass Filter Sets 1−5 (0xDA) • Bass Filter Index (0xDB) • Treble Filter Sets 1−5 (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 1−5. 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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