STA333ML View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA333ML

2-channel microless high-efficiency digital audio system Sound Terminal ®

STMicroelectronics 

STA333ML

Applications

5.2

Internal voltage reference

An embedded voltage regulator produces the reference voltages for the DMOS bridge

driver. It requires two 100 nF capacitors to keep the regulator stable. The capacitors should

be place close to the pins.

Figure 9. Reference voltage block diagram

VCC_REG

100 nF

VSS_REG

VDD_REG

100 nF

GND_REG

Regulator

Input

level

shifter

Driver P

VCC

I2S

interface

Driver N

GND

5.3

PLL filter schematic

It is recommended to use the below scheme and values for the PLL loop filter to achieve the

best performances from the device in general application. Please note that the ground of

this filter scheme has to be connected to the ground of the PLL without any resistive path.

Concerning the component values, please take into account that the greater the filter

bandwidth, the less the lock time, but the higher the PLL output jitter.

Figure 10. PLL application schematic

+3.3V

PWDN

5



C6

100n

5

C7

100n



R4

2.2K

C9

680p

C8

4.7n

MCLK

BICLK

LRCLK

SDI

RESET

INT_LINE

OVERSAMPLING_SEL

GAIN_SEL

+3.3V

GND_DIG

23 PWDN

24 VDD_PLL

25 FILTER_PLL

26 GND_PLL

27 XTI

28 BICLK

29 LRCLK

30 SDI

31 RESET

32 INT_LINE

33 ONSEL

34 GAIN

35 GND_DIG

C3

36 VDD_DIG

100n

VDD

GND_REG

OUT1A

GND1

VCC1

OUT1B

OUT2A

VCC2

GND2

OUT2B

VCC_REG

VSS

TEST_MODE

FMT

GND_SUB

U1

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