TLV320AIC22C_14 Datasheet, PDF (1/55 Pages) Texas Instruments – DUAL VOICE OVER INTERNET PROTOCOL (Volp) CODEC

TLV320AIC22C
DUAL VOICE OVER INTERNET PROTOCOL (VoIP) CODEC
D Two 16-Bit Analog-to-Digital Converters
(ADCs)
D Two 16-Bit Digital-to-Analog Converters
(DACs)
D Programmable Input/Output Gain
D 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
D 8-Bit A-Law/µ-Law Companded Data or
16-Bit Linear Data Complying With G.711
Standard
D Filters Comply With G.712 and G.722
Standards
D Programmable Analog-to-Digital and
Digital-to-Analog Conversion Rate
D Typical 77-dB Signal-to-Noise + Distortion
for ADC
D Typical 78-dB Signal-to-Noise + Distortion
for DAC
SPAS041B – OCTOBER 2001 – REVISED JANUARY 2003
D Supports 8- and 16-kHz Sampling Rates
D Preamplifiers for Microphone, Handset,
Headset, and Speakerphone Gain
Selectable Via the Serial Port or I²C Bus
D 2.5-V Microphone Bias Voltage
D Seamless Interface to a Single Multichannel
Buffered Serial Port (McBSP) of a C54x or
a C6x Digital Signal Processor (DSP)
D Four TLV320AIC22C ICs Can Be Cascaded
Together to Allow up to Eight Channels
D 2s-Complement Data Format
D Differential Outputs
D Typical Low Crosstalk < –85 dB
D Hardware/Software Power Down
D Independent Power Down for Drivers
D Single 3.3-V Supply Operation
D 120-mW Typical Power Consumption
D Available in 48-Terminal Low-Profile Plastic
Quad Flatpack (LQFP) Package
description
The TLV320AIC22C 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.
ORDERING INFORMATION
PACKAGE
TA
PLASTIC QUAD
FLATPACK
(PT)
–40°C to 85°C TLV320AIC22CPT
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
C54x and TMS320C54x are trademarks of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2003, Texas Instruments Incorporated
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