Datasheet
DESCRIPTION
TAS5086
SLES131C – FEBRUARY 2005 – REVISED JUNE 2008 ...................................................................................................................................................
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
The TAS5086 is a six-channel digital pulse-width modulator (PWM) that provides both advanced performance
and a high level of system integration. The TAS5086 is designed to interface seamlessly with most audio digital
signal processors and MPEG decoders, accepting a wide range of input data and clock formats.
The TAS5086 drives six channels of speakers in either single-ended or bridge-tied load configurations that
accept a 1N + 1 interface format. The TAS5086 also supports 2N + 1 power stages with the use of some
external logic (e.g., TAS5112). Stereo line out in I
2
S format is available with either a pass-through signal (SDIN4)
or an internal downmix.
The TAS5086 uses AD modulation operating at a 384-kHz switching rate for 32-, 44.1-, 48-, 88.2-, 96-, 176.4-,
and 192-kHz data. The 8 × oversampling, combined with the 4th-order noise shaper, provides a broad, flat noise
floor and excellent dynamic range from 20 Hz to 20 kHz.
The TAS5086 is only an I
2
C slave device, which always receives MCLK, SCLK, and LRCLK from other system
components. The TAS5086 accepts clock rates of 128, 192, 256, 384, and 512 f
S
. The TAS5086 accepts a 64-f
S
master clock for 176.4-kHz and 192-kHz data.
The TAS5086 accepts a 64-f
S
bit clock for all data rates. The TAS5086 also can accept a 48-f
S
SCLK rate for
MCLK ratios of 192 f
S
and 384 f
S
.
The TAS5086 is composed of five functional blocks.
• Power supply
• Clock, PLL, and serial data interface
• Serial control interface
• Device control
• PWM section
For detailed application information, see the Using the PurePath Digital PWM Processor application report
(SLEA046 ).
Figure 1 shows the functional structure of the TAS5086.
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