Overview
The TLV320AIC23B, produced by Texas Instruments, is a high-performance stereo audio codec that integrates advanced analog functionality. This codec is designed for high-fidelity audio recording and playback in compact, power-saving designs. It features multibit sigma-delta technology with integrated oversampling digital interpolation filters, supporting data-transfer word lengths of 16, 20, 24, and 32 bits, and sample rates from 8 kHz to 96 kHz. The device is particularly suited for portable digital audio-player and recorder applications, such as MP3 players, due to its low power consumption and flexible power management capabilities.
Key Specifications
| Parameter | Specification |
|---|---|
| ADC SNR | Up to 90 dBA (A-weighted at 48 kHz) |
| DAC SNR | Up to 100 dBA (A-weighted at 48 kHz) |
| Sample Rates | 8 kHz to 96 kHz |
| Word Lengths | 16, 20, 24, 32 bits |
| Oversampling Rates | 256 fs, 384 fs, 250 fs, 272 fs |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.42 V to 3.6 V |
| Package Type | 28-TSSOP |
| Operating Temperature | -10°C to 70°C |
| Headphone Amplifier Power | 30 mW per channel into 32 Ω |
Key Features
- High-performance stereo codec with multibit sigma-delta ADC and DAC
- Integrated analog features: stereo-line inputs, analog bypass path, stereo headphone amplifier with analog volume control and mute, and electret-microphone-capsule biasing and buffering solution
- Adjustable and programmable microphone amplifier (gain adjustable from 1 to 5 and 0 dB or 20 dB)
- Support for unique oversampling rates (250 fs and 272 fs) for optimized interface with TI C54x DSPs and USB data interfaces
- Internal oscillator with selectable clock divider for system clock generation
- Low power consumption with selective shutdown of codec functions for extended battery life
- Software control via TI McBSP-compatible multiprotocol serial port and 2-wire/SPI-compatible serial-port protocols
Applications
The TLV320AIC23B is ideally suited for portable digital audio-player and recorder applications, such as MP3 players, due to its high-fidelity audio capabilities and low power consumption. It is also suitable for other portable audio devices that require compact, power-efficient audio solutions. Additionally, the device can be used in designs that integrate FM tuners or other analog audio components, leveraging its analog bypass path and flexible analog features.
Q & A
- What is the signal-to-noise ratio (SNR) of the ADC in the TLV320AIC23B?
The ADC has an SNR of up to 90 dBA (A-weighted at 48 kHz). - What is the maximum power output of the headphone amplifier?
The headphone amplifier can deliver up to 30 mW per channel into 32 Ω. - What are the supported sample rates for the TLV320AIC23B?
The device supports sample rates from 8 kHz to 96 kHz. - What are the unique oversampling rates supported by the TLV320AIC23B?
The device supports unique oversampling rates of 250 fs and 272 fs, in addition to industry-standard rates of 256 fs and 384 fs. - What is the operating temperature range of the TLV320AIC23B?
The operating temperature range is -10°C to 70°C. - What types of serial-port protocols are supported by the TLV320AIC23B?
The device supports 2-wire and SPI-compatible serial-port protocols, as well as TI McBSP-compatible multiprotocol serial port. - Can the TLV320AIC23B be used with external analog components?
- How does the TLV320AIC23B manage power consumption?
The device allows for selective shutdown of codec functions to extend battery life in portable applications.- What is the package type of the TLV320AIC23B?
The device is available in a 28-TSSOP package.- What are the typical applications for the TLV320AIC23B?
The device is typically used in portable digital audio-player and recorder applications, such as MP3 players. - How does the TLV320AIC23B manage power consumption?
