| Audio input type | Digital Input |
| Architecture | Class-D |
| Speaker channels (Max) | Stereo |
| Power stage supply (Max) (V) | 23 |
| Power stage supply (Min) (V) | 8 |
| Load (Min) (ohms) | 6 |
| Output power (W) | 20 |
| SNR (dB) | 105 |
| THD + N @ 1 kHz (%) | 0.24 |
| Iq (Typ) (mA) | 30 |
| Control interface | Hardware, Software |
| Closed/open loop | Open |
| Analog supply (Min) (V) | 3 |
| Analog supply (Max) (V) | 3.6 |
| Sampling rate (Max) (kHz) | 192 |
| Operating temperature range (C) | 0 to 85 |
- Audio Input/Output
- 20-W Into an 8-
Load From an 18-V Supply - Wide Power-Supply Range From (8 V to 23 V)
- Efficient Class-D Operation Eliminates Need for Heat Sinks
- Requires Only Two Power-Supply Rails
- Two Serial Audio Inputs (Four Audio Channels)
- Supports 32-kHz–192-kHz Sample Rates (LJ/RJ/I2S)
- Headphone PWM Outputs
- Subwoofer PWM Outputs
- 20-W Into an 8-
- Audio/PWM Processing
- Independent Channel Volume Controls With 24-dB to –100-dB Range
- Soft Mute (50% Duty Cycle)
- Programmable Dynamic Range Control
- 16 Adaptable Biquads for Speaker EQ
- Seven Biquads for Left and Right Channels
- Two Biquads for Subwoofer Channel
- Adaptive Coefficients for DRC Filters
- Programmable Input and Output Mixers
- DC Blocking Filters
- Loudness Compensation for Subwoofer
- Automatic Sample Rate Detection and Coefficient Banking for DRC and EQ
- General Features
- Serial Control Interface Operational Without MCLK
- Factory-Trimmed Internal Oscillator Enables Automatic Detection of Incoming Sample Rates
- Thermal and Short-Circuit Protection
- Benefits
- EQ: Speaker Equalization Improves Audio Performance
- DRC: Dynamic Range Compression. Enables Power Limiting, Speaker Protection, Easy Listening, Night-Mode Listening
- Autobank Switching: Preload Coefficients for Different Sample Rates. No Need to Write Any Coefficients to the Part When Sample Rate Changes.
- Autodetect: Automatically Detects Sample-Rate Changes. No Need for External Microprocessor Intervention
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The TAS5705 is a 20-W, efficient, digital audio power amplifier for driving stereo bridge-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. The device accepts 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 line-level subwoofer or headphone PWM outputs.
The TAS5705 is a slave-only device receiving clocks from external sources. The TAS5705 operates at a 384-kHz switching rate for 32-, 48-, 96-,and 192-kHz data and 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.
