TAS5709A系列介绍资料

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TAS5709A

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具有扬声器 EQ 和 DRC 的 20W 立体声、8V 至 24V 电源电压、数字输入、开环 D 级音频放大器

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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.

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)
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

Audio input type	Digital Input
Architecture	Class-D
Speaker channels (max)	Stereo
Rating	Catalog
Power stage supply (max) (V)	24
Power stage supply (min) (V)	8
Load (min) (Ω)	6
Output power (W)	20
SNR (dB)	106
THD + N at 1 kHz (%)	0.06
Iq (typ) (mA)	29
Control interface	Hardware, Software
Closed/open loop	Open
Analog supply (min) (V)	3
Analog supply voltage (max) (V)	3.6
Sampling rate (max) (kHz)	48
Operating temperature range (°C)	0 to 85

HTQFP (PHP)

81 mm² 9 x 9

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TAS5709A

具有扬声器 EQ 和 DRC 的 20W 立体声、8V 至 24V 电源电压、数字输入、开环 D 级音频放大器

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