Si3050 datasheet(21/128 Pages) SILABS

21 / 128 page

Si3050 + Si3011/18/19

Rev. 1.5

5. Functional Description

Figure 20. Si3050 + Si3011/18/19 Functional Block Diagram

The Si3050 is an integrated direct access arrangement

(DAA) providing a programmable line interface that

meets global telephone line requirements. The Si3050

implements Silicon Laboratories’ patented isolation

capacitor technology, which offers the highest level of

integration by replacing an analog front end (AFE), an

isolation transformer, relays, opto-isolators, and a 2- to

4-wire hybrid with two highly-integrated ICs.

The Si3050 DAA is fully software programmable to meet

global requirements and is compliant with FCC, TBR21,

JATE, and other country-specific PTT specifications as

shown in Table 13. In addition, the Si3050 meets the

most stringent global requirements for out-of-band

energy, emissions, immunity, high-voltage surges, and

safety, including FCC Parts 15 and 68, EN55022,

EN55024, and many other standards.

5.1. Line-Side Device Support

Three different line-side devices are available for use

with the Si3050 system-side device. The Si3011

line-side device only supports DC terminations

compliant with TBR21 and FCC-compliant countries.

The Si3018 and Si3019 line-side devices are globally

compliant, have a selectable 5 Hz or 200 Hz RX

high-pass filter pole, and offer a –16.5 to 13.5 dB digital

gain/attenuation adjustment in 0.1dB increments for the

transmit and receive paths.

5.1.1. Si3011



TBR-21 and FCC-compliant line-side device.



Selectable dc terminations.



Two selectable ac terminations to increase return loss

and trans-hybrid loss performance.



+6 dBm TX/RX level mode (600 )

5.1.2. Si3018



Globally-compliant line-side device—targets global

DAA requirements for voice applications. This

line-side device supports both FCC-compliant

countries and non-FCC-compliant countries.



Selectable dc terminations.



Four selectable ac terminations to increase return loss

and trans-hybrid loss performance.



+6 dBm TX/RX level mode (600 )

5.1.3. Si3019



Globally-compliant, enhanced features line-side

device—targets global DAA requirements for voice

applications.



Selectable dc terminations



Sixteen selectable ac terminations to further increase

return loss and trans-hybrid loss performance.



Line voltage monitoring in on- and off-hook modes to

enable line in-use/parallel handset detection.



Programmable line current / voltage threshold interrupt.



Polarity reversal interrupt.



+3.2 dBm TX/RX level mode (600 )



+6 dBm TX/RX level mode (600 )



Higher resolution (1.1 mA/bit) loop current

measurement.

Hybrid, AC

and DC

Terminations

Ring Detect

Off-Hook

DCT

VREG2

DCT2

DCT3

RNG1

RNG2

QE2

Si3018/19

VREG

Si3050

Control

Data

Interface

Isolation

Interface

SCLK

SDI

SDO

SDI THRU

Control

Logic

PCLK

DTX

DRX

FSYNC

Line

Data

Interface

TGD

TGDE

RESET

AOUT/INT

RGDT

Isolation

Interface

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