DIX4192IPFB datasheet(54/71 Pages) TI2

54 / 71 page

VDD33

0.1 F

ToRX+

ToRX-

All-Plastic

(5or10metersmaximum)

(1)ToshibaTORX141orequivalent.

Optical

Receiver

(1)

(1)Inserta0.1 Fcap

common-modeDC

acitorwhenblocking

components.

1:1

75W

0.1 F

ToRX+

ToRX-

Dig ta

i lInput

Unbalan

ced

(RCAorBNCConnector)

(1)

(a)Transformer-CoupledUnbalancedLineInterface

75W

0.1 F

ToRX+

ToRX-

DigitalInput

Unbalan

ced

(RCAorBNCConnector)

(b)UnbalancedLineInterfaceWithoutTransformer

(1)Inserta0.1 Fcap

common-modeDCvoltage.

acitorwhenblocking

1:1

110W

0.1 F

ToRX+

T R

XLR

DigitalInput

110

alanced

(1)

DIX4192

SBFS031F – FEBRUARY 2006 – REVISED SEPTEMBER 2016

www.ti.com

Product Folder Links: DIX4192

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Application Information (continued)

Figure 72. Transformer-Coupled Balanced Input Interface

Unbalanced 75-

Ω coaxial cable interfaces are commonly employed in consumer and broadcast audio

applications. Designs with and without transformer line coupling may be used. Figure 73(a) shows the

recommended 75-

Ω transformer-coupled line interface, which shares many similarities to the balanced design

shown in Figure 72. Once again, the transformer provides isolation and improved noise rejection. Figure 73(b)

shows the transformer-free interface, which is commonly used for S/PDIF consumer connections.

Figure 73. Unbalanced Line Input Interfaces

Optical interfaces using all-plastic fiber are commonly employed for consumer audio equipment where

interconnections are less than 10 m in length. Optical receiver modules used for a digital audio interface operate

from either a single 3.3-V or 5-V supply and have a TTL–, CMOS-, or low-voltage CMOS-compatible logic output.

Interfacing to 3.3-V optical receivers is straightforward when the optical receiver supply is powered from the

DIX4192 VDD33 power source, as shown in Figure 74. For the 5-V optical receivers, the output high logic level

may exceed the DIX4192 line receiver absolute maximum input voltage. A level translator is required, placed

between the optical receiver output and the DIX4192 line receiver input. Figure 75 shows the recommended

input circuit when interfacing a 5-V optical receiver to the DIX4192 line receiver inputs. The Texas Instruments

SN74LVC1G125 single buffer IC is operated from the same 3.3-V supply used for DIX4192 VDD33 supply. This

buffer includes a 5-V tolerant digital input, and provides the logic level translation required for the interface.

Figure 74. Interfacing to a 3.3-V Optical Receiver Module

DIX4192IPFB Datasheet(PDF) 54 Page - Texas Instruments

DIX4192IPFB Datasheet(HTML) 54 Page - Texas Instruments

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