Two 16-Bit Analog-to-Digital Converters
(ADCs)
Two 16-Bit Digital-to-Analog Converters
(DACs)
Programmable Input/Output Gain
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
8-Bit A-Law/μ-Law Companded Data or
16-Bit Linear Data Complying With G.711
Standard
Filters Comply With G.712 and G.722
Standards
Programmable Analog-to-Digital and
Digital-to-Analog Conversion Rate
Typical 77-dB Signal-to-Noise + Distortion
for ADC
Typical 78-dB Signal-to-Noise + Distortion
for DAC
Supports 8- and 16-kHz Sampling Rates
Preamplifiers for Microphone, Handset,
Headset, and Speakerphone Gain
Selectable Via the Serial Port or I2C Bus
2.5-V Microphone Bias Voltage
Seamless Interface to a Single Multichannel
Buffered Serial Port (McBSP) of a C54x. or
a C6x Digital Signal Processor (DSP)
Four TLV320AIC22C ICs Can Be Cascaded
Together to Allow up to Eight Channels
2s-Complement Data Format
Differential Outputs
Typical Low Crosstalk < .85 dB
Hardware/Software Power Down
Independent Power Down for Drivers
Single 3.3-V Supply Operation
120-mW Typical Power Consumption
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.