TAS5086 Status: ACTIVE

Product Information

Features

• Audio Input/Output
  • Automatic Master Clock Rate and Data Sample Rate Detection
  • Four Serial Audio Inputs (Eight Channels)
  • Support for 32-, 44.1-, 48-, 88.2-, 96-, 176.4-, and 192-kHz Sampling Rates
  • Data Formats: 16-, 20-, or 24-Bit Input Data; Left-Justified, Right-Justified, and I²S
  • 64- or 48-f_S Bit-Clock Rate
  • 128-, 192-, 256-, 384-, and 512-f_S Master Clock Rates (Up to a Maximum of 50 MHz)
  • Six PWM Audio Output Channels
  • Any Output Channel Can be Mapped to Any Output Pin
  • Supports Single-Ended and Bridge-Tied Loads
  • I²S Serial Audio Output
• Audio Processing
  • Volume Control Range of 48 dB to -100 dB
  • Master Volume Control from 24 dB to -100 dB in 0.5-dB Increments
  • Six Individual Channel Volume Controls With 24-dB to -100-dB Attenuation in 0.5-dB Increments
  • Serial Output Can Be Produced by Downmix of 5.1-Channel Input or Fourth Serial Input
  • 5.1-Channel Downmix to 2.1 or 3.1 PWM Output Speaker System
  • Integrated Bass Management
  • Two Programmable Biquads in Subwoofer Channel
  • Full Six-Channel Input and Output Mapping
  • Selectable DC Blocking Filters
• PWM Processing
  • 8× Oversampling With Fourth-Order Noise Shaping at 44.1, 48 kHz; 4× Oversampling at 88.2, 96 kHz; 2× Oversampling at 176.4, 192 kHz; and 12× Oversampling at 32 kHz
  • ≥105-dB Dynamic Range (TAS5086+TAS5186)
  • THD < 0.06% (TAS5086 Only)
  • 20-Hz—20-kHz Flat Noise Floor for 44.1-, 48-, 88.2-, 96-, 176.4- and 192-kHz Data Rates
  • Digital De-Emphasis for 32-kHz, 44.1-kHz and 48-kHz Data Rates
  • Intelligent AM Interference Avoidance System Provides Clear AM Reception
  • Optimized PWM Sequence for Click- and Popless Start and Stop
  • Optimized PWM Sequence for Charging of AC-Coupling Capacitors in Single-Ended Configurations
  • Adjustable Modulation Limit From 93.8% to 99.2%
• General Features
  • Automated Operation With Easy-to-Use Control Interface
  • I²C Serial Control Slave Interface
  • Control Interface Operational Without MCLK
  • Single 3.3-V Power Supply
  • 38-Pin TSSOP Package

PurePath Digital Is a trademark of Texas Instruments
All other trademarks are the property of their respective owners

Description

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 I²S 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 I²C 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).