7-W, digital input smart amp with I/V sense for speaker protection & integrated 13-V Class-H boost


Product details


Audio input type Digital Input Architecture Class-D Boosted, Smart Amp Speaker channels (Max) Mono Power stage supply (Max) (V) 5.5 Power stage supply (Min) (V) 2.7 Load (Min) (ohms) 6.4 Output power (W) 7 SNR (dB) 110 THD + N @ 1 kHz (%) 0.01 Iq (Typ) (mA) 11.6 Control interface I2C Closed/open loop Closed Analog supply (Min) (V) 2.7 Analog supply (Max) (V) 5.5 PSRR (dB) 108 Operating temperature range (C) -40 to 85 open-in-new Find other Speaker amps

Package | Pins | Size

DSBGA (YBG) 36 6 mm² 2.634 x 2.464 open-in-new Find other Speaker amps


  • Key Features
    • 256 Level, 13-V Class-H Boost
    • Speaker Current and Voltage Sense
    • Inter Chip Alignment (ICLA) of gain across devices.
  • Output Power
    • 7-W 0.1% THD+N (8 Ω at 3.8 V)
  • Power Consumption (1% THD+N, 4.2 V into 8 Ω)
    • 83.5% efficiency at 1 W
    • <1uA HW shutdown VBAT Current
  • Power Supplies
    • VBAT: 2.7 V to 5.5 V
    • VDD: 1.65 V to 1.95 V
    • Digital (1.5 V) is internally generated from VDD.
    • IO and Analog supplies are internally shorted to VDD.
  • Protections
    • Battery: Advanced Brown Out
    • Clipping: VBAT Tracking Peak Voltage Limiter
    • Transducer: DC Detection and Prevention
    • Device: Thermal and Over Current Protection
  • Interfaces and Control
    • I2S/TDM: 8 Channels of 32 bit each up to 96 KSPS
    • I2C: 4 selectable addresses
    • 16 KSPS to 192 KSPS Sample Rates
    • MCLK Free operation
  • Performance
    • Speaker/Receiver Mode with Dynamic Noise Control of Idle Channel Noise (ICN)
    • Receiver Mode: 10 µVrms ICN
    • Speaker Mode: 15 µVrms ICN
    • Spread Spectrum Low EMI Mode
    • 110 dB SNR at 1% THD+N(8Ω)

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The TAS2564 is a digital input, Class-D audio amplifier with a 256 level, 13 V Class-H boost. The robust 13 V Class-H boost provides the power needed for peak output while the algorithmically-controlled 256 level boost reduces the average power consumption. The boost is easily configured with PurePath Console GUI.

The Class-D amplifier is capable of delivering 7 W of peak power into an 8 Ω. TAS2564 is 83.5% efficient at 1 W output level. Integrated speaker voltage and current sense provides real time monitoring to keep speakers in the safe operation area.

Battery tracking peak voltage limiter with brown-out prevention optimizes amplifier headroom over the entire battery discharge. Up to four devices can share a common bus via I2S/TDM + I 2C interfaces.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TAS2564 7-W Class-D Smart Amp With Integrated 13-V Class-H boost &I/V Sense for Speaker Protection datasheet (Rev. A) Dec. 12, 2019
Application note Current and Voltage Sensing Accuracy and Linearity Jul. 21, 2020
Application note Limitations of Capacitor only EMI Filters on Class-D Amplifiers Jul. 21, 2020
Application note Requesting Access to Audio Software Jun. 18, 2020
Application note TAS2564 Schematic and Layout Guidelines Jun. 15, 2020
Technical articles How a look-ahead boost conquers battery-life challenges in speakers Feb. 20, 2020
Application note TAS2562, TAS2563 Thermal Foldback Feature on SmartAmps Jan. 29, 2020
User guide SmartAmp Learning Board 2 User's Guide (Rev. A) Sep. 13, 2019
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
User guide TAS2564YBGEVM-DC User's Guide Jul. 01, 2019
Application note Passive Component Selection Guide for Class-D Audio Amplifier Jun. 27, 2019
Application note Battery Voltage Tracking Limiter and Brown-Out Protection Jun. 26, 2019
Application note PCB Layout Guidelines for TAS2xxx Series Class-D Boosted Audio Amplifier Jun. 06, 2019
Application note Benefits of Class-G and Class-H Boost in Audio Amplifiers Apr. 30, 2019
Application note PLL and Clocking Configuration for Audio Devices Mar. 26, 2019
Application note How the SmartAmp Speaker Protection Algorithm Compensates the Effects of Series Aug. 08, 2018
Application note SmartPA Speaker Protection Algorithm Aug. 06, 2018
Technical articles Smart speakers don’t have to sound as small as they are Jun. 04, 2018
Technical articles Don’t limit your audio: how to achieve loud sound from a small speaker Dec. 18, 2017
Application note Smart Amp Tuning Guide Sep. 05, 2017
Application note Smart Amp Quick Start Guide Aug. 03, 2017
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) May 01, 2013

Design & development

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

Hardware development

document-generic User guide

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 (...)

  • Easily and quickly characterize speakers
  • Quick connection to TI Smart Amplifier EVMs
  • Microphone included for SPL measurements
  • Laser input for speaker excursion measurements
document-generic User guide
As a motherboard for smart amp solutions, this EVM allows for a modular approach to TI's low power audio/haptics portfolio. Enabled with each product's respective daughter card, the designer can evaluate their application and assess a wider range of possible solutions. Can moderate between (...)
  • Compatible with learning board
  • USB Bidirectonal, for digital input support and an ADC for analog audio source
  • Differential filter for performance characterization
  • Supports up to 8 devices
  • Feeds back modified signal to Ambient Echo Cancellation firmware
  • Waveform control for haptic response
document-generic User guide
Designed to be used in junction with the PPC3-EVM-MB. this daughter card evaluation module provides the designer with the tools to integrate our smart amp portfolio into their application. This EVM provides both mono and stereo solutions with the ability to enable/disable IV Sense. Incorporated with (...)
  • Stereo or mono evaluation
  • USB input
  • Connect multiple boards
  • PPC3 integration

Software development

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

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
DSBGA (YBG) 36 View options

Ordering & quality

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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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