| Audio input type | Digital Input |
| Architecture | Class-D |
| Speaker channels (Max) | Stereo |
| Power stage supply (Max) (V) | 24 |
| Power stage supply (Min) (V) | 8 |
| Load (Min) (ohms) | 6 |
| Output power (W) | 20 |
| SNR (dB) | 106 |
| THD + N @ 1 kHz (%) | 0.06 |
| Iq (Typ) (mA) | 29 |
| Control interface | Hardware, Software |
| Closed/open loop | Open |
| Analog supply (Min) (V) | 3 |
| Analog supply (Max) (V) | 3.6 |
| Sampling rate (Max) (kHz) | 48 |
| Operating temperature range (C) | 0 to 85 |
- Audio Input/Output
- 20-W Into an 8-
Load From an 18-V Supply - Wide PVDD Range, From 8 V to 24 V
- Efficient Class-D Operation Eliminates Need for Heatsinks
- Requires Only 3.3 V and PVDD
- One Serial Audio Input (Two Audio Channels)
- Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
- 20-W Into an 8-
- Audio/PWM Processing
- Independent Channel Volume Controls With 24 dB to Mute
- Soft Mute (50% Duty Cycle)
- Programmable 2-Band Dynamic Range Control
- 22 Programmable Biquads for Speaker EQ and Other Audio-Processing Features
- Programmable Coefficients for DRC Filters
- Programmable Input and Output Mixers
- DC Blocking Filters
- Support for 3D Effects
- Pseudo Bass Support
- General Features
- Serial Control Interface Operational Without MCLK
- Factory-Trimmed Internal Oscillator for Automatic Rate Detection
- Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
- Thermal and Short-Circuit Protection
- Benefits
- EQ: Speaker Equalization Improves Audio Performance
- DRC: Dynamic Range Compression. Can Be Used As Power Limiter. Enables Speaker Protection, Easy Listening, Night-Mode Listening
- Two-Band DRC: Sets Two Different Thresholds for Low- and High-Frequency Content
- Autobank Switching: Preload Coefficients for Different Sample Rates. No Need to Write New Coefficients to the Part When Sample Rate Changes
- Autodetect: Automatically Detects Sample-Rate Changes. No Need for External Microprocessor Intervention
The TAS5709 is a 20-W, efficient, digital audio-power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital-audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. A fully programmable data path routes these channels to the internal speaker drivers.
The TAS5709 is a slave-only device receiving all clocks from external sources. The TAS5709 operates with a PWM carrier between a 384-kHz switching rate and a 352-KHz switching rate, depending on the input sample rate. Oversampling combined with a fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20?Hz to 20 kHz.
The TAS5709A is identical in function to the TAS5709, but has a unique I2C device address. The address of the TAS5709 is 0x36. The address of the TAS5709A is 0x3A.
