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.