TI Launches 4-Channel Audio ADC TLV320ADC5140
Enhances low-volume audio signals with 120dB DRE


Smart home system developers require long-distance voice capture capabilities to implement voice command functions. However, capturing voice commands in noisy environments has been difficult due to the limited number of microphone sensors and signal processing capabilities.

On the 19th, Texas Instruments (TI) unveiled the 'TLV320ADC5140', a 4-channel audio ADC (Analog-to-Digital Converter) product capable of capturing voice within a radius of up to 10 meters, to the Korean market.

The TLV320ADC5140, part of the TI Burr-Brown audio ADC family, increases the ability to capture voice from a distance up to a radius of 10 meters for applications such as high-end speakers, soundbars, wireless speakers, high-definition TVs, IP cameras, video conferencing systems, and smart home appliances.

The TLV320ADC5140 includes a 120dB Dynamic Range Enhancer (DRE). This DRE amplifies low-volume audio signals at the system level and maintains recording performance with less distortion, even when close to speaker outputs. It also enhances long-distance hi-fi recording capabilities in all environments.

The TLV320ADC5140, which supports microphones with a high signal-to-noise ratio with a dynamic range of over 106dB, can combine up to 4 analog or 8 digital microphones, increasing system flexibility.

It also includes programmable features such as gain and phase calibration to equalize microphone array mismatches. In addition, it includes features such as a programmable gain amplifier, high-pass filter, channel mixing, and linear phase or ultra-low latency decimation filters.

The TLV320ADC5140 integrates multiple functions to reduce the need for external digital signal processing. Therefore, the system size can be reduced without compromising system reliability, and the power consumption is 8.5mW per channel at a 16kHz sampling rate and 9.2mW per channel at a 48kHz sampling rate.
“The TLV320ADC5140 has a voice capture distance that is more than four times greater than the existing TLV320ADC3101,” said Abhi Muppiri, TI Audio Codec & Converter Product Marketing Manager. “It provides flexibility in system design because it allows for the combination of four analog microphones or eight digital microphones from the prototyping stage.”

The TLV320ADC5140, currently available through the TI store, comes in a 4×4mm 24-pin WQFN package. The price is $2.99 per unit for quantities of 1,000. Additionally, the ADC5140EVM-PDK, a TLV320ADC5140 4-channel 768kHz TI Burr-Brown audio ADC evaluation module, is available in limited quantities. The price is $199.

Meanwhile, according to the Smart Home Industry Association, the size of the domestic smart home market is expected to expand to approximately 31 trillion won by 2025.