TAS2781RYYR datasheet(18/90 Pages) TI2

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7 Parameter Measurement Information

The typical characteristics for the device are measured using the Bench Evaluation Module (EVM) and an

Audio Precision Analyzer. A PSIA interface is used to allow the I2S interface to be driven directly into the Audio

Precision Analyzer.

In some measurements (THD+N, ICN, DNR, and so forth), Class-D output terminals are connected to the Audio

Precision Analyzer analog inputs through a Differential-to-Single Ended (D2S) filter as shown below. The D2S

filter contains a second order passive pole at 120 kHz and an instrumenation amplifier. The D2S filter ensures

the TAS2781 high performance Class-D amplifier has its outputs filtered and buffered before processed. This

prevents measurement errors due to loading effects of AUX-00XX filter on the Class-D outputs.

Figure 7-1. Differential to Single Ended (D2S) Filter

8 Detailed Description

8.1 Overview

The TAS2781 is a mono digital input Class-D amplifier optimized for applications where efficient battery

operation and small solution size are critical. It integrates speaker IV (current/voltage) sensing and battery

tracking limiting with brown out prevention. The device operates using TDM/I2S and I2C (or SPI) interfaces.

The TAS2781 provides a Hybrid-Pro algorithm for controlling an external boost converter to extend battery life.

Table 8-1. Full Scales

Input/Output Signal

Full Scale Value

Class-D Output

21 dBV

Voltage Monitor

23 V

Current Sense

5 A

Voltage Sense

16 Vpk

TAS2781

SLOSE86B – JULY 2022 – REVISED JULY 2023

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TAS2781RYYR 데이터시트(PDF) 18 Page - Texas Instruments