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Same functionality with different pin-out to the compared device
TAS2557 ACTIVE 5.7-W, digital input smart amp with integrated speaker protection, advanced EQ & 8.5-V Class-H boost TAS2557 features the Post-Filter Feedback (PFFB)
NEW TAS2572 ACTIVE 6.6W digital-input smart amplifier with I/V sense and integrated 13V Class-H boost Higher output power and improved distortion and noise

Product details

Audio input type Digital Input Architecture Class-D Boosted, Smart Amp Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 8.5 Power stage supply (min) (V) 2.7 Load (min) (Ω) 4 Output power (W) 5.7 SNR (dB) 111 THD + N at 1 kHz (%) 0.02 Iq (typ) (mA) 3 Control interface I2C, SPI Closed/open loop Closed Analog supply (min) (V) 2.95 Analog supply voltage (max) (V) 5.5 Sampling rate (max) (kHz) 96 PSRR (dB) 110 Operating temperature range (°C) -40 to 85
Audio input type Digital Input Architecture Class-D Boosted, Smart Amp Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 8.5 Power stage supply (min) (V) 2.7 Load (min) (Ω) 4 Output power (W) 5.7 SNR (dB) 111 THD + N at 1 kHz (%) 0.02 Iq (typ) (mA) 3 Control interface I2C, SPI Closed/open loop Closed Analog supply (min) (V) 2.95 Analog supply voltage (max) (V) 5.5 Sampling rate (max) (kHz) 96 PSRR (dB) 110 Operating temperature range (°C) -40 to 85
DSBGA (YZ) 42 See data sheet
  • Ultra low-noise mono boosted class-D amplifier
    • 5.7 W at 1% THD+N and 6.9 W at 10% THD+N into 4-Ω load from 4.2-V supply
    • 3.8 W at 1% THD+N and 4.5 W at 10% THD+N into 8-Ω load from 4.2-V supply
  • Output noise for DAC + class-D (ICN) is 15.9 µV
  • DAC + class-D SNR 111 dB at 1%THD+N/8 Ω
  • THD+N – dB at 1 W / 8 Ω with flat frequency response
  • PSRR dB for 200 mVpp ripple at 217 Hz
  • Input sample rates from 8 kHz to 96 kHz
  • Built-in speaker sense
    • Measures speaker current and voltage
    • Measures VBAT voltage, chip temperature
  • Dedicated real-time DSP for speaker protection
    • Thermal and excursion protection
    • Detects speaker leaks and damage
  • High efficiency class-H boost converter with multi-level tracking
    • 86% at 500 mW in 8 Ω with 3.6 V VBAT
    • 87% at 700 mW in 8 Ω with 4.2 V VBAT
  • Configurable automatic gain control (AGC)
    • Limits battery current consumption
  • Adjustable class-D switching edge-rate control
  • Thermal, short-circuit, and under-voltage protection
  • I2S, Left-justified, right-justified, DSP, and TDM input and output interface,
  • I2C or SPI interface for register control
  • Stereo configuration using two TAS2555 devices
  • Power supplies
    • Boost input: 2.9 V to 5.5 V
    • Analog/digital: 1.65 V to 1.95 V
    • Digital I/O: 1.62 V to 3.6 V
  • 42-ball, 0.5-mm pitch, DSBGA package
  • Ultra low-noise mono boosted class-D amplifier
    • 5.7 W at 1% THD+N and 6.9 W at 10% THD+N into 4-Ω load from 4.2-V supply
    • 3.8 W at 1% THD+N and 4.5 W at 10% THD+N into 8-Ω load from 4.2-V supply
  • Output noise for DAC + class-D (ICN) is 15.9 µV
  • DAC + class-D SNR 111 dB at 1%THD+N/8 Ω
  • THD+N – dB at 1 W / 8 Ω with flat frequency response
  • PSRR dB for 200 mVpp ripple at 217 Hz
  • Input sample rates from 8 kHz to 96 kHz
  • Built-in speaker sense
    • Measures speaker current and voltage
    • Measures VBAT voltage, chip temperature
  • Dedicated real-time DSP for speaker protection
    • Thermal and excursion protection
    • Detects speaker leaks and damage
  • High efficiency class-H boost converter with multi-level tracking
    • 86% at 500 mW in 8 Ω with 3.6 V VBAT
    • 87% at 700 mW in 8 Ω with 4.2 V VBAT
  • Configurable automatic gain control (AGC)
    • Limits battery current consumption
  • Adjustable class-D switching edge-rate control
  • Thermal, short-circuit, and under-voltage protection
  • I2S, Left-justified, right-justified, DSP, and TDM input and output interface,
  • I2C or SPI interface for register control
  • Stereo configuration using two TAS2555 devices
  • Power supplies
    • Boost input: 2.9 V to 5.5 V
    • Analog/digital: 1.65 V to 1.95 V
    • Digital I/O: 1.62 V to 3.6 V
  • 42-ball, 0.5-mm pitch, DSBGA package

The TAS2555 device is a state-of-the-art Class-D audio amplifier which is a full system on a Chip (SoC). The device features a ultra low-noise audio DAC and Class-D power amplifier which incorporates speaker voltage and current sensing feedback. An on-chip, low-latency DSP supports Texas Instruments SmartAmp speaker protection algorithms to maximizes loudness while maintaining safe speaker conditions.

The device can be used easily with any processor with an I2S output and stereo implementations are possible when using two TAS2555 devices. Separate tuning for different speakers is supported allowing customers to add value while maintaining form factor designs. Additionally, the TAS2555 supports separate voice and audio tuning dynamically with ultra-low 15.9 µV ICN regardless of mode of operation making receiver/speaker implementations possible.

A Class-H boost converter generates the Class-D amplifier supply rail. When the audio signal only requires a lower Class-D output power, the boost improves system efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When higher audio output power is required, the multi-level boost quickly activates tracking the signal to provide the additional voltage to the load.

The TAS2555 device is a state-of-the-art Class-D audio amplifier which is a full system on a Chip (SoC). The device features a ultra low-noise audio DAC and Class-D power amplifier which incorporates speaker voltage and current sensing feedback. An on-chip, low-latency DSP supports Texas Instruments SmartAmp speaker protection algorithms to maximizes loudness while maintaining safe speaker conditions.

The device can be used easily with any processor with an I2S output and stereo implementations are possible when using two TAS2555 devices. Separate tuning for different speakers is supported allowing customers to add value while maintaining form factor designs. Additionally, the TAS2555 supports separate voice and audio tuning dynamically with ultra-low 15.9 µV ICN regardless of mode of operation making receiver/speaker implementations possible.

A Class-H boost converter generates the Class-D amplifier supply rail. When the audio signal only requires a lower Class-D output power, the boost improves system efficiency by deactivating and connecting VBAT directly to the Class-D amplifier supply. When higher audio output power is required, the multi-level boost quickly activates tracking the signal to provide the additional voltage to the load.

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Technical documentation

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Type Title Date
* Data sheet TAS2555 5.7-W Class-D mono audio amplifier with class-H boost and speaker sense datasheet (Rev. B) PDF | HTML 28 Feb 2019
Technical article How smart amps are bringing high-fidelity audio into the smart home PDF | HTML 03 May 2021
Application note Current and Voltage Sensing Accuracy and Linearity PDF | HTML 21 Jul 2020
Application note Limitations of Capacitor only EMI Filters on Class-D Amplifiers PDF | HTML 21 Jul 2020
Application note Requesting Access to Audio Software 18 Jun 2020
User guide SmartAmp Learning Board 2 User's Guide (Rev. A) 13 Sep 2019
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) 26 Aug 2019
Application note Passive Component Selection Guide for Class-D Audio Amplifier 27 Jun 2019
Application note Battery Voltage Tracking Limiter and Brown-Out Protection PDF | HTML 26 Jun 2019
Application note PCB Layout Guidelines for TAS2xxx Series Class-D Boosted Audio Amplifier 06 Jun 2019
Application note Benefits of Class-G and Class-H Boost in Audio Amplifiers 30 Apr 2019
Application note PLL and Clocking Configuration for Audio Devices PDF | HTML 26 Mar 2019
Application note How the SmartAmp Speaker Protection Algorithm Compensates the Effects of Series 08 Aug 2018
Application note SmartPA Speaker Protection Algorithm 06 Aug 2018
Technical article Don’t limit your audio: how to achieve loud sound from a small speaker PDF | HTML 18 Dec 2017
More literature Calibration and Verification Wave Files 21 Sep 2017
Application note TAS2555 End System Integration Guide 08 Sep 2017
Application note Smart Amp Tuning Guide 05 Sep 2017
Application note TAS2555, TAS2557, and TAS2559 Factory Test and Calibration Guide 02 Sep 2017
Application note Smart Amp Quick Start Guide 03 Aug 2017
Technical article Audio loudness and quality evaluations for smart amplifier solutions PDF | HTML 22 Jan 2016
Technical article PurePath Console 3 gets fine-tuned! PDF | HTML 11 Nov 2015
EVM User's guide TAS2555 EVM User's Guide 18 Sep 2015
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) 01 May 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

PP-SALB2-EVM — PP-SALB2-EVM Smart amp speaker characterization board evaluation module (Learning Board 2)

This board supports: TAS2555YZEVMTAS2557EVM and TAS2559EVM.

The Smart Amplifier Speaker Characterization Board, when used in conjunction with a supported TI Smart Amplifier and PurePath Console software, provides users the ability to measure speaker excursion, temperature and other parameters for (...)

User guide: PDF
Not available on TI.com
Evaluation board

TAS2555YZEVM — TAS2555 5.7W Class-D Audio Amplifier Evaluation Module

The TAS2555YZEVM evaluation module provides users with an small reference board for complete evaluation of the TAS2555 Audio Amplifier. Shipped complete with a reference speaker, users can quickly hear the audio quality of the TAS2555 solution or start developing on their own speaker/application. (...)

User guide: PDF
Not available on TI.com
Application software & framework

PUREPATHCONSOLE PurePath™ Console graphical development suite for audio system design and development

PurePath™ Console is a highly integrated and easy-to-use audio development suite designed specifically to simplify the evaluation, configuration and debug process associated with the development of audio products. Watch how easy it is to use the PurePath™ Console 3 software.

PurePath Console’s (...)
Supported products & hardware

Supported products & hardware

Products
Audio CODECs
TAC5111 Low-power mono audio codec with 105dB dynamic range ADC and 114dB dynamic range DAC TAC5111-Q1 Automotive low power mono audio codec with 102-dB dynamic range ADC, 106-dB DAC TAC5112 Low-power stereo audio codec with 105dB dynamic range ADC and 114dB dynamic range DAC TAC5112-Q1 Automotive low-power stereo audio codec with 102-dB dynamic range ADC, 106-dB DAC TAC5211 High-performance mono audio codec with 119dB dynamic range ADC and 120dB dynamic range DAC TAC5212 High-performance stereo audio codec with 119dB dynamic range ADC and 120dB dynamic range DAC TAC5212-Q1 Automotive low-power stereo audio codec with 115-dB dynamic range ADC, 120-dB DAC TAC5311-Q1 Automotive mono audio codec with 102-dB dynamic range ADC, 106-dB DAC, HV-input and diagnostics TAC5312-Q1 Automotive stereo audio codec with 102-dB dynamic range ADC, 106-dB DAC, HV-input and diagnostics TAC5411-Q1 Automotive mono audio codec with dynamic range of 110-dB ADC, 120-dB DAC, HV-input and diagnostics TAC5412-Q1 Automotive stereo audio codec with 110-dB dynamic range ADC, 120-dB DAC, HV-input and diagnostics TLV320AIC3268 TLV320AIC3268 Ultra Low Power Stereo Audio Codec
Audio DACs
PCM5142 2V RMS DIRECTPATH 112dB Audio Stereo DAC with PCM interface and fully programmable miniDSP PCM5242 4.2-VRMS DirectPath™, 32-bit, 384-kHz, 114-dB Audio Stereo DAC TAD5112 Low-power stereo audio DAC with 110dB dynamic range, and headphone and line driver TAD5112-Q1 Automotive low-power stereo audio DAC with 106-dB dynamic range TAD5212 High-performance stereo audio DAC with 120dB dynamic range, and headphone and line driver TAD5212-Q1 Automotive low-power stereo audio DAC with 120-dB dynamic range PCM1690 113dB SNR 8-Channel Audio DAC with Differential Outputs
Audio ADCs
PCM1841-Q1 Automotive, quad-channel 32-bit 192-kHz audio analog-to-digital converter (ADC) PCM3120-Q1 Automotive, stereo, 106-dB SNR, 768-kHz, low-power software-controlled audio ADC PCM3140-Q1 Automotive, quad-channel 768-kHz Burr-Brown™ audio analog-to-digital converter (ADC) with 106-dB SNR PCM5120-Q1 Automotive, stereo, 120-dB SNR, 768-kHz, low-power software-controlled audio ADC PCM5140-Q1 Automotive, quad-channel 768-kHz Burr-Brown™ audio analog-to-digital converter (ADC) with 120-dB SNR PCM6120-Q1 Automotive, stereo, 123-dB SNR, 768-kHz, low-power software-controlled audio ADC PCM6140-Q1 Automotive, quad-channel 768-kHz Burr-Brown™ audio analog-to-digital converter (ADC) with 122-dB SNR PCMD3140-Q1 Automotive, 127-dB SNR, 768-kHz, four-channel, PDM-input to TDM- or I²S-output converter PCMD3180-Q1 Automotive, eight-channel pulse-density-modulation input to TDM or I²S output converter TAA5212 High-performance stereo audio ADC with 119dB dynamic range and configurable digital filters TAA5412-Q1 Automotive stereo audio ADC with 110-dB dynamic range, HV-input integrated HV-MICBIAS, diagnostics PCMD3180 Eight-channel pulse-density-modulation input to TDM or I²S output converter PCMD3140 Four-channel PDM-input to TDM- or I²S-output converter
Headphone amps
TPA6166A2 43-mW, stereo, analog input headphone amplifier with accessory detection
Speaker amps
TAS2110 6.1W mono digital input Class-D speaker amp with integrated 11V Class-H boost TAS2552 4-W, digital/analog input smart amp with I/V sense for speaker protection & integ. 8.5-V boost TAS2555 5.7-W, digital input smart amp with integrated speaker protection, advanced EQ & 8.5-V Class-H boost TAS2557 5.7-W, digital input smart amp with integrated speaker protection, advanced EQ & 8.5-V Class-H boost TAS2559 5.7-W, digital input smart amp with integrated speaker protection with stereo processing TAS2560 5.6-W digital input smart amp with I/V sense for speaker protection & integrated 8.5-V Class-H boost TAS2562 6.1-W, digital input smart amp with I/V sense for speaker protection & integrated 11-V Class-H boost TAS2563 6.1-W, digital input, smart amp & integrated speaker protection, advanced EQ & 11-V Class-H boost TAS2564 7-W, digital input smart amp with I/V sense for speaker protection & integrated 13-V Class-H boost TAS2572 6.6W digital-input smart amplifier with I/V sense and integrated 13V Class-H boost TAS2764 13-W, digital input, 2.3-V to 16-V smart amp I/V sense for speaker protection and multi-level supply TAS2770 20-W, digital input, 4.5- to 18-V smart amp with I/V sense for speaker protection TAS2780 25-W, digital input, 4.5-V to 24-V 6-A peak smart amp with I/V sense for speaker protection TAS2781 25 W, 4.5-V to 23-V, digital-input integrated-audio-processing speaker-protection class-D amplifier TAS5729MD 12-W stereo, 24-W mono, 4.5- to 26.4-V supply, digital input open loop Class-D audio amplifier w/ HP TAS5731 20-W stereo, 41-W mono, 8- to 21.5-V, digital input open loop Class-D audio amplifier w/ 2.1 support TAS5733L 10-W stereo, 20-W mono, 8- to 16.5-V, digital input open loop Class-D audio amplifier w/ EQ & AGL TAS5751M 25-W stereo, 40-W mono, 8- to 26.4-V, digital input open loop Class-D audio amplifier w/ EQ & AGL TAS5754M 40-W stereo, 61-W mono, 4.5- to 26.4-V supply, digital input Class-D audio amplifier TAS5756M 30-W stereo, 40-W mono, 4.5- to 26.4-V supply, digital input Class-D audio amplifier TAS5760L 21-W stereo, 42-W mono, 4.5- to 16.4-V supply, digital input Class-D audio amplifier TAS5760LD 21-W stereo, 42-W mono, 4.5- to 16.4-V, digital input Class-D audio amplifier w/ integrated HP TAS5760M 55-W stereo, 114-W mono, 4.5- to 26.4-V supply, digital input Class-D audio amplifier TAS5760M-Q1 Automotive, 25-W, 2-ch, 4.5- to 26.4-V supply digital input Class-D audio amplifier TAS5760MD 55-W stereo, 114-W mono, 4.5- to 26.4-V, digital input Class-D audio amplifier w/ integrated HP TAS5766M 50-W stereo, 100-W mono, 4.5- to 26.4-V supply, digital input Class-D Smart Audio Amplifier TAS5780M 20-W stereo, 40-W mono, 4.5- to 26.4-V supply, digital input Class-D audio amplifier TAS5782M 20-W stereo, 40-W mono, 4.5- to 26.4-V, digital input Class-D Smart Audio Amplifier w/ processing TAS5805M 23-W stereo, 45-W mono, 4.5- to 26.4-V supply, digital input Class-D audio amplifier w/ processing TAS5822M 35-W, inductor-less, digital input, stereo, closed-loop Class-D amp with 96-kHz enhanced process TAS5825M 38-W stereo, 65-W mono, 4.5- to 26-V, digital input Class-D Smart Audio Amplifier w/ 192kHz arch TAS5825P 4.5V to 26.4V Class-H control digital-in Class-D audio amp with ultra-low idle & superior efficiency TAS6422-Q1 Automotive, 75-W, 2-MHz, 2-ch 4.5- to 26.4-V digital input Class-D audio amplifier w/ load dump TAS6424-Q1 Automotive, 75-W, 2-MHz, 4-ch, 4.5- to 26.4-V digital input Class-D audio amplifier TAS6424E-Q1 Automotive, 75-W, 2-MHz, quad-channel, 4.5- to 26.4-V digital input Class-D audio amplifier TAS6424L-Q1 Automotive, 27-W, 2-MHz, 4-ch 4.5- to 18-V digital input Class-D audio amplifier w/ load dump TPA6404-Q1 Automotive, 45-W, 2-MHz, 4-ch 4.5- to 18-V supply analog input Class-D audio amplifier w/ load dump
Piezo speaker drivers/receivers
DRV5825P 4.5-V to 26.4-V, 7.5-A stereo, 15-A mono, digital input, Piezo driver with smart I/V protection
Hardware development
Evaluation board
ADC3120EVM-PDK TLV320ADC3120 evaluation module for stereo-channel, 768-kHz, Burr-Brown™ audio ADC with 106-dB SNR ADC3120Q1EVM-PDK PCM3120-Q1 evaluation module for stereo, 768-kHz, audio analog-to-digital converter with 106-dB SNR ADC5120EVM-PDK TLV320ADC5120 evaluation module for stereo-channel, 768-kHz, Burr-Brown™ audio ADC with 120-dB SNR ADC5120Q1EVM-PDK PCM5120-Q1 evaluation module for stereo, 768-kHz, audio analog-to-digital converter with 120-dB SNR ADC6120EVM-PDK TLV320ADC6120 evaluation module for stereo-channel, 768-kHz, Burr-Brown™ audio ADC with 123-dB SNR ADC6120Q1EVM-PDK PCM6120-Q1 evaluation module for stereo, 768-kHz, audio analog-to-digital converter with 123-dB SNR PCM1809EVM PCM1809 evaluation module PCMD3140Q1EVM-PDK PCMD3140-Q1 evaluation module for four-channel, PDM-input to TDM- or I²S-output converter PP-SALB2-EVM PP-SALB2-EVM Smart amp speaker characterization board evaluation module (Learning Board 2) TAS2555YZEVM TAS2555 5.7W Class-D Audio Amplifier Evaluation Module TAS2557EVM TAS2557 5.7-W Class-D Audio Amplifier Evaluation Module with Class-H Boost and Speaker Sense TAS2559EVM TAS2559 5.7-W Class-D Audio Amplifier Evaluation Module TAS2560EVM TAS2560 5.6W Class-D Audio Amplifier Evaluation Module TAS2770EVM TAS2770EVM Mono, Digital Input, Class-D, IV Sense Audio Amplifier Evaluation Module for QFN Package TAS2781EVM TAS2781 evaluation module for mono Class-D audio amplifier with digital input and speaker IV sense TAS3251EVM TAS3251 175W Stereo / 350W Mono Ultra-HD Digital-In Class-D Evaluation Module TAS5721EVM TAS5721 Evaluation Module TAS5733LEVM TAS5733L Digital Input, Open-Loop Class-D Audio Amplifier Evaluation Module TAS5751MEVM TAS5751M Digital Input, Open Loop Class-D Audio Amplifier Evaluation Module TAS5754MDCAEVM TAS5754M 30-W Digital I2S Input, Closed-Loop Audio Class-D Amplifier Evaluation Module TAS5756MDCAEVM TAS5756M 30-W Digital I2S Input, Closed-Loop Audio Class-D Amplifier Evaluation Module TAS5760XXEVM TAS5760M/MD/L/LD Evaluation Module TAS5782MEVM TAS5782M Digital Input Closed-Loop Class-D Audio Amplifier with 96-kHz Processing Evaluation Module TAS5805MEVM TAS5805M Digital Input Stereo Closed-Loop Class-D Audio Amplifier with Enhanced Processing EVM TAS5825MEVM Digital-input closed-loop class-D audio amp with 96kHz/192kHz extended processing evaluation module
Driver or library

SLAC723 TAS2555SW-Android

Supported products & hardware

Supported products & hardware

Products
Speaker amps
TAS2555 5.7-W, digital input smart amp with integrated speaker protection, advanced EQ & 8.5-V Class-H boost
Driver or library

TAS2XXX-DRIVERS — Android and other drivers for the TAS25XX and TAS27XX series of Class-D amplifiers

These Android drivers support TI’s low power digital input Class-D audio amplifier devices. The "Get software" buttons link to git.ti.com repositories for these open-source drivers.
Support software

TAS2555SW-SA TAS2555SW-SA EVM boards and Software for PurePath™ Smart Amp TAS2555

TAS2555SW-SA EVM boards and Software for PurePath™ Smart Amp TAS2555
Supported products & hardware

Supported products & hardware

Products
Speaker amps
TAS2555 5.7-W, digital input smart amp with integrated speaker protection, advanced EQ & 8.5-V Class-H boost
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins CAD symbols, footprints & 3D models
DSBGA (YZ) 42 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

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Support & training

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