| Audio input type | Digital Input |
| Architecture | Class-D |
| Speaker channels (Max) | 4 |
| Power stage supply (Max) (V) | 26 |
| Power stage supply (Min) (V) | 10 |
| Load (Min) (ohms) | 4 |
| Output power (W) | 20 |
| SNR (dB) | 99 |
| THD + N @ 1 kHz (%) | 0.05 |
| Iq (Typ) (mA) | 33 |
| Control interface | Hardware, Software |
| Closed/open loop | Closed |
| Analog supply (Min) (V) | 3 |
| Analog supply (Max) (V) | 3.6 |
| Sampling rate (Max) (kHz) | 192 |
| PSRR (dB) | 60 |
| Operating temperature range (C) | 0 to 85 |
- Audio Input/Output
- 20-W into an 8-
Load From an 18-V Supply - Two Serial Audio Inputs (Four Audio Channels)
- 20-W into an 8-
- TAS5706A Supports:
- 2-Ch Bridged Outputs (20 W × 2)
- TAS5706B Supports:
- 2-Ch Bridged Outputs (20 W × 2)
- 4-Ch Single-Ended Outputs (10 W × 4)
- 2-Ch Single-Ended + 1-Ch Bridged (2.1 Mode) (10 W × 2 + 20 W)
- Supports 32-kHz-192-kHz Sample Rates (LJ/RJ/I2S)
- Closed Loop Power Stage Architecture
- Improved PSRR Reduces Power Supply Performance Requirements
- Higher Damping Factor Provides for Tighter, More Accurate Sound With Improved Bass Response
- Constant Output Power Over Variation in Supply
- Wide PVCC Range From (10 V to 26 V)
- No Separate Supply Required for Gate Drive
- Headphone PWM Outputs
- Subwoofer PWM Outputs
- AM Interference Avoidance Support
- Audio/PWM Processing
- Independent Channel Volume Controls With 48-dB to -79-dB Range—Soft Mute (50% Duty Cycle)
- Programmable Dynamic Range Control
- 7 Programmable Biquads for Speaker Equalization for Left and Right Channels
- 4 Programmable Biquads for Bass Processing
- Adaptive Biquad Coefficients for EQ and DRC Filters
- Programmable Input and Output Mixers
- Automatic Sample-Rate Detection and Coefficient Banking
- General Features
- Serial Control Interface Operational Without MCLK
- Factory-Trimmed Internal Oscillator Avoids the Need for External Crystal
- Surface Mount, 64-Terminal, 10-mm × 10-mm HTQFP Package
- Thermal and Short-Circuit Protection
All trademarks are the property of their respective owners.
The TAS5706A/B is a 20-W, efficient, digital audio power amplifier for driving stereo bridged-tied speakers. Two serial data inputs allow processing of up to four discrete audio channels and seamless integration to most digital audio processors and MPEG decoders, accepting a wide range of input data and clock rates. A fully programmable data path allows these channels to be routed to the internal speaker drivers or output via the subwoofer or headphone PWM outputs.
The TAS5706A/B is a slave-only device receiving all clocks from external sources. The TAS5706A/B operates at a 384-kHz switching rate for 32-, 48-, 96-, and 192-kHz data, and at a 352.8 kHz switching rate for 44.1-, 88.2-, and 176.4-kHz data. The 8× oversampling combined with the fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.
