Description

The Si3000 is a complete voice band audio codec solution that offers high integration by incorporating programmable input and output gain/attenuation, a microphone bias circuit, handset hybrid circuit, and an output drive for 32 Ω headphones. The Si3000 can be connected directly to the Si3034, Si3035, Si3044, and Si3056 North American and international DAA chipsets through their daisy-chaining serial interface. It also serves as a companion chip to a FAT ISOmodem chipset with voice features, providing hardware support for a handset and speaker phone. The device operates from a single 3.3 to 5 V power supply and is available in a 16-pin small outline package (SOIC).

Features

Complete voice codec solution includes the following:

■ 84 dB ADC Dynamic Range

■ 84 dB DAC Dynamic Range

■ 4–12 kHz Sample Rates

■ 30 dB Microphone Pre-Amp

■ Programmable Input Gain/Attenuation: –34.5 dB to 12 dB

■ Programmable Output Gain/Attenuation: –34.5 dB to 12 dB

■ Support for 32  Headphones

■ 3:1 Analog Input Mixer

■ 3.3–5.0 V Power Supply

■ Direct Serial Interface to DSPs

■ Direct Connection to Si303x/44/56, serial interface DAA chipsets

■ Low profile 16-Pin SOIC Package

■ RoHS-compliant package available

Applications

■ Modem Voice Channel (DSVD)

■ Telephony

■ Speech Processing

■ General Purpose Analog I/O

■ Companion chip for FDX ISOmodems with voice features