TAS5708 Series
20-W stereo, 10- to 26-V supply, digital input, closed loop Class-D audio amplifier w/ EQ & DRC
Manufacturer: Texas Instruments
Catalog
20-W stereo, 10- to 26-V supply, digital input, closed loop Class-D audio amplifier w/ EQ & DRC
Key Features
• Audio Input/Output20-W Into an 8-Ω Load From an 18-V SupplyWide PVCC Range (10 V to 26 V); 3.3 V Digital SupplySupports One Serial Audio Input (8 kHz - 48 kHz Sample Rates) (LJ/RJ/I2S)Power-Stage Feedback Allows Operation From Poorly Regulated Power SuppliesAudio/PWM ProcessingFactory-Trimmed Internal Oscillator for Automatic Rate DetectionHigh-End 32-Bit Data Path Audio Processor14 Biquads for Speaker EQDynamic Range Control (DRC)BenefitsEQ: Speaker Equalization Improves Audio PerformanceDRC: Enables Speaker Protection and Night-Mode Listening.Autobank Switching: Preloaded Coefficients for Three Different Sample Rates Eliminates the Need to Update Coefficients When Sample Rate ChangesAutodetect: Automatically Detects Sample-Rate Changes Eliminating the Need for External Microprocessor InterventionClosed-Loop Power Stage: Enables Wide PVCC Operating Range and Reduced Power Supply Ripple DistortionAudio Input/Output20-W Into an 8-Ω Load From an 18-V SupplyWide PVCC Range (10 V to 26 V); 3.3 V Digital SupplySupports One Serial Audio Input (8 kHz - 48 kHz Sample Rates) (LJ/RJ/I2S)Power-Stage Feedback Allows Operation From Poorly Regulated Power SuppliesAudio/PWM ProcessingFactory-Trimmed Internal Oscillator for Automatic Rate DetectionHigh-End 32-Bit Data Path Audio Processor14 Biquads for Speaker EQDynamic Range Control (DRC)BenefitsEQ: Speaker Equalization Improves Audio PerformanceDRC: Enables Speaker Protection and Night-Mode Listening.Autobank Switching: Preloaded Coefficients for Three Different Sample Rates Eliminates the Need to Update Coefficients When Sample Rate ChangesAutodetect: Automatically Detects Sample-Rate Changes Eliminating the Need for External Microprocessor InterventionClosed-Loop Power Stage: Enables Wide PVCC Operating Range and Reduced Power Supply Ripple Distortion
Description
AI
The TAS5708 is a 20-W, efficient, digital audio power amplifier for driving stereo bridge-tied speakers. A 32-bit datapath eliminates the need for pre-scaling before processing and preserves signal integrity without sacrificing dynamic range. A digital audio processor with fully programmable digital filters allows designers to custom tune speakers for optimum sound in small enclosures. A programmable DRC can adjust power levels for a scaleable design while also enabling night-mode listening modes.
The closed-loop architecture allows the device to operate from poorly regulated supplies. Figure 1 below shows the benefit of the feedback architecture when a noisy supply (1kHz, 500mVpp ripple) modulates a 10kHz audio input. The figure shows a 40dB improvement in sideband suppression when compared to an open-loop design. This correlates directly to a 24dB improvement in distortion as seen in Figure 2.
The TAS5708 is a 20-W, efficient, digital audio power amplifier for driving stereo bridge-tied speakers. A 32-bit datapath eliminates the need for pre-scaling before processing and preserves signal integrity without sacrificing dynamic range. A digital audio processor with fully programmable digital filters allows designers to custom tune speakers for optimum sound in small enclosures. A programmable DRC can adjust power levels for a scaleable design while also enabling night-mode listening modes.
The closed-loop architecture allows the device to operate from poorly regulated supplies. Figure 1 below shows the benefit of the feedback architecture when a noisy supply (1kHz, 500mVpp ripple) modulates a 10kHz audio input. The figure shows a 40dB improvement in sideband suppression when compared to an open-loop design. This correlates directly to a 24dB improvement in distortion as seen in Figure 2.
