TAS5721 datasheet(59/78 Pages) TI1

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TAS5721

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SLOS739A – JULY 2012 – REVISED MARCH 2016

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10.2.1 Design Requirements

Table 25 lists the design parameters of the TAS5721.

(1)

Refer to SLOA119 for a detailed description on the filter design.

Table 25. Design Parameters

PARAMETER

EXAMPLE

Low Power Supply

3.3 V

High Power Supply

8 V to 24 V

Host Processor

I2S Compliant Master

I2C Compliant Master

GPIO Control

Output Filters

Inductor-Capacitor Low Pass Filter(1)

Speaker

Ω minimum BTL

Ω minimum PBTL and Single Ended

10.2.2 Detailed Design Procedure

10.2.2.1 Component Selection and Hardware Connections

The typical connections required for proper operation of the device can be found on the TAS5721EVM User’s

Guide (SLOU346). The device was tested this this list of components, deviation from this typical application

components unless recommended by this document may produce unwanted results, which could range from

degradation of audio performance to destructive failure of the device. The application report SLOA119 offers a

detailed description on proper component selection and design of the output filter based upon the modulation

used, desired load and response.

10.2.2.2 I2C Pullup Resistors

Customary pullup resistors are required on the SCL and SDA signal lines. They are not shown in the Typical

Application Circuits, because they are shared by all of the devices on the I²C bus and are considered to be part

of the associated passive components for the System Processor. These resistor values should be chosen per the

guidance provided in the I²C Specification.

10.2.2.3 Digital I/O Connectivity

The digital I/O lines of the TAS5721 are described in previous sections. As discussed, whenever a static digital

pin (that is a pin that is hardwired to be HIGH or LOW) is required to be pulled HIGH, it should be connected to

DVDD through a pullup resistor to control the slew rate of the voltage presented to the digital I/O pins. It is not,

however, necessary to have a separate pullup resistor for each static digital I/O line. Instead, a single resistor

can be used to tie all static I/O lines HIGH to reduce BOM count.

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