描述 Description

The Si3050+Si3011/18/19 Voice DAA chipset provides a highly-programmable and globally-compliant foreign exchange office (FXO) analog interface. The solution implements Silicon Laboratories patented isolation capacitor technology, which eliminates the need for costly isolation transformers, relays, or opto-isolators, while providing superior surge immunity for robust field performance. The Voice DAA is available as a chipset, a system-side device (Si3050) paired with a line-side device (Si3011/18/19). The Si3050 is available in a 20-pin TSSOP or a 24-pin QFN. The Si3011/18/19 is available in a 16-pin TSSOP, a 16-pin SOIC, or a 20-pin QFN and requires minimal external components. The Si3050 interfaces directly to standard telephony PCM interfaces.

特性 Features

■ PCM highway data interface

■ μ-law/A-law companding

■ SPI control interface

■ GCI interface

■ 80 dB dynamic range TX/RX

■ Line voltage monitor

■ Loop current monitor

■ +6 dBm or +3.2 dBm TX/RX level

mode

■ Parallel handset detection

■ 3 μA on-hook line monitor current

■ Overload detection

■ Programmable line interface

● AC termination

● DC termination

● Ring detect threshold

● Ringer impedance

■ TIP/RING polarity detection

■ Integrated codec and 2- to 4-wire

analog hybrid

■ Programmable digital hybrid for

near-end echo reduction

■ Polarity reversal detection

■ Programmable digital gain in 0.1 dB

increments

■ Integrated ring detector

■ Type I and II caller ID support

■ Pulse dialing support

■ 3.3 V power supply

■ Daisy-chaining for up to 16 devices

■ Greater than 5000 V isolation

■ Patented isolation technology

■ Ground start and loop start support

■ Available in Pb-free RoHS-compliant

packages

Applications

■ DSL IADs

■ VoIP gateways

■ PBX and IP-PBX systems

■ Voice mail systems

■ DECT base stations