IC DGTL AUDIO PWM PROC 64-TQFP

TAS5508APAG

Manufacturer Part NumberTAS5508APAG
DescriptionIC DGTL AUDIO PWM PROC 64-TQFP
ManufacturerTexas Instruments
TypePWM Processor
TAS5508APAG datasheet
 


Specifications of TAS5508APAG

ApplicationsDVDMounting TypeSurface Mount
Package / Case64-TQFP, 64-VQFPFor Use WithTAS5342DDV6EVM - TAS5342DDV6EVMTAS5508-5142K7EVM - EVAL MODULE FOR TAS5508B/TAS5142TAS5508-5122C6EVM - EVAL MODULE FOR TAS5508B/TAS5122TAS5508-5121K8EVM - EVAL MODULE FOR TAS5508B/TAS5121
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names296-17475
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Output automute: A single channel is muted when the output of the DAP section is less in magnitude
than the input threshold value for a programmable amount of time.
The detection period and thresholds for these two detectors are the same.
This time interval is selectable via I
10, 20, 30, 40, 50, 60, 70, 80, 90, 100, and 110 ms. This interval is independent of the sample rate. The
default value is mask programmable.
The input threshold value is an unsigned magnitude that is expressed as a bit position. This value is
2
adjustable via I
C. The range of the input threshold adjustment is from below the LSB (bit position 0) to
below bit position 12 in a 24-bit input-data word (bit positions 8 to 20 in the DSPE). This range provides an
input threshold that can be adjusted for 12 to 24 bits of data. The default value is mask programmable.
CD Data Range
24-Bit Input
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
32 Bits in DSPE
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Representation
The automute state is exited when the TAS5508A receives one sample that is greater than the output
threshold.
The output threshold can be one of two values:
Equal to the input threshold
6 dB (one bit position) greater than the input threshold
The value for the output threshold is selectable via I
The system latency enables the data value that is above the threshold to be preserved and output.
A mute command initiated by automute, master mute, individual I
sequence, or the bank-switch mute sequence overrides an unmute command or a volume command.
While a mute command is activated, the commanded channels transition to the mute state. When a
channel is unmuted, it goes to the last commanded volume setting that has been received for that
channel.
2.9
Loudness Compensation
The loudness compensation function compensates for the Fletcher-Munson loudness curves. The
TAS5508A loudness implementation tracks the volume control setting to provide spectral compensation
for weak low- or high-frequency response at low volume levels. For the volume tracking function, both
linear and logarithmic control laws can be implemented. Any biquad filter response can be used to provide
the desired loudness curve. The control parameters for the loudness control are programmable via the I
interface.
Submit Documentation Feedback
8-Channel Digital Audio PWM Processor
2
C to be from 1 ms to 110 ms. The increments of time are 1, 2, 3, 4, 5,
DVD Data Range
8
7
6
5
Threshold Range
Figure 2-13. Automute Threshold
2
C. The default value is mask programmable.
TAS5508A
SLES119A – FEBRUARY 2004 – REVISED JULY 2009
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0
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2
C mute, the AM interference mute
Description
1
0
M0013-01
2
C
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