Product Matrix

Voice Codec

Si3000
The Si3000 is a complete solution for voice I/O such as handsets in multi-function printers. It can be connected directly to any high-speed, ISOmodem system-side chip to support a telephone handset, and an extended AT command set is available to control the Si3000.

Block Diagram

 

Features

84 dB dynamic range A/D and D/A converter with 16-bit resolution
Microphone input; programmable gain of 0, +10, +20, +30 dB
Line level input (1 V RMS)
3:1 analog input mixer
Integrated handset hybrid
Digital input/output gain; programmable range of +12.5 to –34.5 dB
 Line level output (1 V RMS)
Headphone output capable of driving a 32 ohm load
1.5 dB step resolution
50 mW power consumption
Low profile 16-pin small outline package (SOIC)

Applications

Modems with voice channel – speakerphone

PC Card Modems with Cellular Telephone Support

Web Phone

Fax Machines with handset support

Voice Recognition Systems

Consumer Telephony

Technologies

Supports daisy-chaining with Si3034 or Si3035 silicon DAAs for single DSP serial port operation

Resources

Documentation
  
  
  
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Product Matrix

Part NumberAvailable DocumentsMicrophone AmplifierInput MixerHeadphone DriverHandset HybridPackage 
Si3000Data SheetYesYesYesYesSOIC16

 

In addition to a codec (A/D, D/A), the device integrates a microphone preamplifier, three-input mixer, +12.5 to –34.5 dB of programmable gain, headphone/speaker driver, and an integrated handset hybrid for direct connection to a two-wire telephone handset. Programmable gain and attenuation settings are available on both the A/D converter and the D/A converter signal paths with 1.5 dB step resolution. Programmable gain/attenuation is implemented using a zero crossing technique to enable “click-free” level transitions. Operation from a single +5 V or a single +3.3 V power supply makes the device suitable for low power portable applications.