Overview
The TLV320AIC22CPT, produced by Texas Instruments, is a dual voice over internet protocol (VoIP) codec designed for voice applications. It features two 16-bit analog-to-digital converter (ADC) channels and two 16-bit digital-to-analog converter (DAC) channels. These channels can be connected to various devices such as handsets, headsets, speakers, microphones, or subscriber lines via an analog crosspoint. The device is particularly suited for VoIP and other voice communication systems, offering a flexible serial interface and compatibility with digital signal processors (DSPs) like the C54x and C6x series.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 48-Terminal Low-Profile Plastic Quad Flatpack (LQFP) |
| Operating Temperature Range | -40°C to 85°C |
| Analog-to-Digital Converters (ADCs) | Two 16-Bit ADCs |
| Digital-to-Analog Converters (DACs) | Two 16-Bit DACs |
| Signal-to-Noise + Distortion (ADC) | Typical 77 dB |
| Signal-to-Noise + Distortion (DAC) | Typical 78 dB |
| Sampling Rates | 8 kHz and 16 kHz |
| Power Supply | Single 3.3-V Supply Operation |
| Typical Power Consumption | 204 mW |
| Crosstalk | Typical Low Crosstalk < 85 dB |
Key Features
- Programmable Input/Output Gain
- Analog Crosspoint to Connect the Two Coders/Decoders (Codecs) to Any of the I/O Ports
- 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
- 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
- Hardware/Software Power Down and Independent Power Down for Drivers
Applications
The TLV320AIC22CPT is designed for various voice communication applications, including:
- Voice over Internet Protocol (VoIP)
- Telephony Systems
- Handsets and Headsets
- Speakerphones
- Subscriber Line Interfaces
Q & A
- What is the TLV320AIC22CPT used for?
The TLV320AIC22CPT is a dual VoIP codec used for voice applications, including VoIP, telephony systems, handsets, headsets, and speakerphones.
- How many ADC and DAC channels does the TLV320AIC22CPT have?
The TLV320AIC22CPT features two 16-bit ADC channels and two 16-bit DAC channels.
- What is the operating temperature range of the TLV320AIC22CPT?
The operating temperature range is -40°C to 85°C.
- What are the supported sampling rates?
The device supports 8 kHz and 16 kHz sampling rates.
- How can the TLV320AIC22CPT be powered down?
The TLV320AIC22CPT can be powered down via a dedicated terminal or by using software control.
- What is the typical power consumption of the TLV320AIC22CPT?
The typical power consumption is 204 mW.
- Can multiple TLV320AIC22CPT units be cascaded?
Yes, up to four TLV320AIC22CPT units can be cascaded together to allow up to eight channels.
- What type of data format does the TLV320AIC22CPT use?
The device uses 2s-complement data format.
- What is the microphone bias voltage provided by the TLV320AIC22CPT?
The microphone bias voltage is 2.5 V.
- How is the analog crosspoint controlled?
The analog crosspoint is controlled through the serial port or the I2C bus.
