TLV320AIC22C

双 VoIP 编解码器

The contains two coders/decoders codecs for voice applications, including voice over internet protocol VoIP. It features two analog-to-digital converter ADC channels and two digital-to-analog converter DAC channels that can be connected to a handset, headset, speaker, microphone, or a subscriber line via an analog crosspoint.

The TLV320AIC22C has a flexible serial interface that allows the two channels of the TLV320AIC22C to be interfaced to a single multichannel buffered serial port McBSP of the external digital signal processor DSP. The two channels share the digital interface at different time slots. Up to four TLV320AIC22C units can be cascaded together to obtain eight channels. For control purposes, either the serial interface or the inter-integrated circuit I2C interface can be used. Programmable-gain amplifiers PGAs, preamp gain, microphone bias voltages, and analog crosspoint are programmed through the serial interface or the I2C interface. The TLV320AIC22C can be powered down, via a dedicated terminal or by using software control, to reduce power dissipation.

The TLV320AIC22C is available in a 48-terminal LQFP package and is characterized for operation from –40°C to 85°C.

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Two 16-Bit Analog-to-Digital Converters ADCs

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Two 16-Bit Digital-to-Analog Converters DACs

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Programmable Input/Output Gain

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Analog Crosspoint to Connect the Two Coders/Decoders Codecs to Any of the I/O Ports –   Controlled Through the Serial Port or the Inter-Integrated Circuit I2C Bus

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8-Bit A-Law/µ-Law Companded Data or 16-Bit Linear Data Complying With G.711 Standard

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Filters Comply With G.712 and G.722 Standards

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Programmable Analog-to-Digital and Digital-to-Analog Conversion Rate

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Typical 77-dB Signal-to-Noise + Distortion for ADC

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Typical 78-dB Signal-to-Noise + Distortion for DAC

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Supports 8- and 16-kHz Sampling Rates

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Preamplifiers for Microphone, Handset, Headset, and Speakerphone Gain Selectable Via the Serial Port or I2C Bus

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2.5-V Microphone Bias Voltage

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Seamless Interface to a Single Multichannel Buffered Serial Port McBSP of a C54x™ or a C6x Digital Signal Processor DSP

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Four TLV320AIC22C ICs Can Be Cascaded Together to Allow up to Eight Channels

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2s-Complement Data Format

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Differential Outputs

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Typical Low Crosstalk < –85 dB

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Hardware/Software Power Down

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Independent Power Down for Drivers

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Single 3.3-V Supply Operation

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204-mW Typical Power Consumption

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Available in 48-Terminal Low-Profile Plastic Quad Flatpack LQFP Package

C54x and TMS320C54x are trademarks of Texas Instruments Incorporated.