Texas Instruments TAS2120 Audio Amplifier
Texas Instruments TAS2120 Audio Amplifier is a mono, digital input Class-D audio amplifier with an integrated Boost for higher power delivery in battery-operated systems. This amplifier is optimized to deliver excellent battery life for real-world music playback and voice call scenarios. Advanced efficiency optimization features, such as Y-bridge and algorithms, enable the device to produce best-in-class efficiency across all power regions of operation. The TAS2120 Class-D amplifier is capable of delivering 8.2W output power using integrated Class-H Boost. This device supports a look-ahead algorithm-based optimum boost voltage levels to match the output of the audio signal. This provides all the power needed for peak output while significantly reducing the average power consumption. The TAS2120 amplifier is ideal for smart speakers with voice assistance, BLUETOOTH® and wireless speakers, building automation, tablets, wearables, laptops, and desktop computers.
Up to four devices can share a common bus via I2S/TDM and I2C interfaces. This amplifier also supports HW pin-based pre-defined controls that can configure the device. The TAS2120 audio amplifier is available in a 26-pin, 0.4mm pitch, and QFN package.
Features
- Powerful Class-D amplifier:
- 8.2W output power (rms) @1% THD+N
- 14.75V boost with 5.1A maximum current limit
- Best-in-class efficiency:
- Up to 91% efficiency @1W, 8Ω load
- 14.7mW idle channel power, noise gate off
- 5.3mW idle channel power, noise gate on
- Integrated 1.8V VDD Y-bridge
- Advanced 33mV step size class-H boost
- High-performance audio channel:
- 4.2µV A-wt. idle channel noise
- 114.4dB dynamic range
- -90dB THD+N
- Low EMI performance with ERC and SSM
- <1µs chip-to-chip group delay matching
- Advanced integrated features:
- Signal detection high efficiency modes
- High-accuracy supply voltage monitor and temperature sensor
- Programmable battery current limit at 39mA step size
- Boost sharing between two devices
- External class-H boost control algorithm
- Ease of use features:
- HW pin control or I2C-based control
- Internal boost or external PVDD supply
- Clock-based power up/down
- Auto clock rate detection 16kHz to 192kHz frequency range
- MCLK free operation
- Thermal and over-current protection, power, and digital audio
- Power supplies and user interface:
- 2.5V to 5.5V VBAT
- 2.5V to 10V VBAT_SNS
- 1.65V to 1.95V VDD
- 1.8V or 3.3V IOVDD
- 8 channels I2S/TDM
- 26-pin, 0.4mm pitch, QFN package
Applications
- Smart speakers with voice assistance
- Bluetooth and wireless speakers
- Building automation
- Tablets and wearables
- Laptop and desktop computers
Functional Block Diagram
