Overview
The TAS5558DCAR is an 8-channel Digital Pulse Width Modulator (PWM) with integrated Digital Audio Processing and Sample Rate Converter, designed by Texas Instruments. This component is optimized for high-performance audio applications, particularly supporting DTS-HD specifications and Blu-ray HTiB (Home Theater in a Box) systems. It offers advanced audio processing capabilities, including asynchronous sample rate conversion, native audio processing, and power-supply-volume-control (PSVC) for enhanced dynamic range at lower power levels.
Key Specifications
| Parameter | Value |
|---|---|
| Package | HTSSOP (DCA) - 56 pins |
| Operating Temperature Range (°C) | -40 to 85 |
| Dynamic Range (dB) | 105 |
| Digital Supply (V) | 3 to 3.6 |
| Audio Input Type | Digital |
| Control Interface | I2C |
| Speaker Channels (max) | 8 |
| THD + N at 1 kHz (%) | 0.01 |
| Switching Rate | 384 kHz |
| External Crystal Frequency | 12.288 MHz |
Key Features
- 8-channel asynchronous sample rate converter supporting up to 192 kHz
- 4-channel native audio processing at 192 kHz
- 30 kHz audio bandwidth for DTS-HD compatibility
- Energy manager for overall system power control
- Power-supply-volume-control (PSVC) for enhanced dynamic range at lower power levels
- Up to five synchronous serial audio inputs and one synchronous serial audio output
- Trimmed internal oscillator for clock auto-detection and limp mode
- Slave mode with auto/manual sample rate detection
- Eight differential PWM outputs supporting AD, BD, and ternary modulation
- Two differential PWM headphone outputs
- I2S output for external wireless sub
- Volume control range of 18 dB to 127 dB with bass and treble tone controls
- Configurable loudness compensation and dynamic range compressors
- Seven biquads per channel with coefficient banking and auto bank switch
- Flexible automute logic with programmable threshold and duration
Applications
The TAS5558DCAR is designed for high-performance audio applications, including:
- Blu-ray Home Theater in a Box (HTiB) systems
- DTS-HD compatible audio systems
- Class G power supply configurations
- External differential-input analog headphone amplifiers
- Wireless audio sub-systems using I2S output
Q & A
- What is the primary function of the TAS5558DCAR?
The TAS5558DCAR is an 8-channel Digital Pulse Width Modulator (PWM) with integrated Digital Audio Processing and Sample Rate Converter.
- What is the operating temperature range of the TAS5558DCAR?
The operating temperature range is -40°C to 85°C.
- What is the dynamic range of the TAS5558DCAR?
The dynamic range is greater than 105 dB.
- What type of modulation does the TAS5558DCAR support?
The TAS5558DCAR supports AD, BD, and ternary modulation.
- What is the switching rate of the TAS5558DCAR?
The switching rate is 384 kHz.
- What is the purpose of the power-supply-volume-control (PSVC) feature?
The PSVC feature enhances dynamic range at lower power levels and can be used in Class G power supply configurations.
- How many synchronous serial audio inputs and outputs does the TAS5558DCAR support?
It supports up to five synchronous serial audio inputs and one synchronous serial audio output.
- What is the frequency of the external crystal required for the TAS5558DCAR?
The external crystal must be 12.288 MHz.
- Does the TAS5558DCAR support I2S output for external wireless sub-systems?
Yes, it supports I2S output for external wireless sub-systems.
- What are the volume control and tone adjustment capabilities of the TAS5558DCAR?
The TAS5558DCAR has a volume control range of 18 dB to 127 dB and includes bass and treble tone controls with ±18-dB range and selectable corner frequencies.
