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