The TAS5548 is an 8-channel Digital Pulse Width Modulator (PWM) with Digital Audio Processing and Sample Rate Converter that provides both advanced performance and a high level of system integration. TAS5548 is designed to support DTS-HD specification Blu-ray HTiB applications. The ASRC consists of two separate modules which handle 4 channels each. Therefore, it is possible to support up to two different input sampling rates.
●Texas Instruments Power Stages are designed to work seamlessly with the TAS5548. The TAS5548 also provides a high-performance, differential output to drive an external, differential-input, analog headphone amplifier.
●The TAS5548 supports AD, BD, and ternary modulation operating at a 384-kHz switching rate for 48-, 96-, and 192-kHz data. The external crystal used must be 12.288 MHz. The TAS5548 also features power-supply-volume-control (PSVC), which improves dynamic range at lower power level and can be used as part of a Class G power supply when used with closed-loop PWM input power stages.
● General Features
● 8ch Asynchronous Sample Rate Converter
● 8 Channel Audio Processing for 32-192 kHz
●(ARSC to 96kHz)
● 4 Channel Native Audio Processing at 192kHZ
● 30 kHz Audio Bandwidth for DTS-HD
●Compatibility
● Energy Manager for Overall System Power
●Control
● Power Supply Volume Control
● Audio Input or Output
● Up to Five Synchronous Serial Audio Inputs
●(10 Channels)
● Up to One Synchronous Serial Audio Outputs
●(2 Channels)
● I2S Master Mode When Used With External
●Crystal
● Slave Mode 32-192KHz With Auto/Manual
●Sample Rate Detection
● Eight Differential PWM Output That can
●Support AD or BD Modulation
● Two Differential PWM Headphone Outputs
● I2S Out for External Wireless Sub
● PWM Output Supports Single Ended (S.E.) or
●Bridge Tied Load (BTL)
● Audio Processing
● Volume Control Range 18 dB to –127 dB
●(Master and Eight Channel Volume)
● Bass and Treble Tone Controls With ±18-dB
●Range, Selectable Corner Frequencies
● Configurable Loudness Compensation
● Two Dynamic Range Compressors With Two
●Thresholds, Two Offsets, and Three Slopes
● Seven Biquads Per Channel
● PWM Processing
● >105-dB Dynamic Range
● THD+N < 0.1% (0–40 kHz)
● 20-Hz–40-kHz, Flat Noise Floor for 32KHz
●192KHz
● Flexible Automute Logic With Programmable
●Threshold and Duration for Noise-Free
●Operation
● Power-Supply Volume Control (PSVC) in High-
●Performance Applications
● Adjustable Modulation Limit
