NAU88C14YG

Codecs Overview

The NAU88C14YG is a mono audio CODEC designed for voice telephony applications. It features 24-bit signal processing with an ADC SNR of 91dB and DAC SNR of 93dB. The device integrates a BTL speaker driver capable of 1W into 8Ω at 5V, and a headset driver providing 40mW into 16Ω at 3.3V. It supports variable sample rates from 2.5kHz to 48kHz. Analog supply voltage ranges from 2.5V to 3.6V, while the digital core operates between 1.71V and 3.6V. The component is housed in a 24-pin QFN package and operates within an industrial temperature range of -40°C to +85°C.

Codecs Feature Summary

• Integrates a 5-band graphic equalizer and programmable automatic level control with noise gate for optimized audio performance.
• Includes a differential microphone input with programmable gain amplification and a single-ended auxiliary input.
• Features integrated BTL speaker driver and headset driver outputs to reduce external component requirements.
• Supports I2S and PCM digital audio interfaces alongside SPI and 2-Wire serial control interfaces.

Codecs Applications

• VoIP Telephones
• Conference speaker-phones
• IP PBX systems
• Mobile Telephone Hands-free Kits
• Residential & Consumer Intercoms

Codecs Procurement Notes

Verify the specific ordering suffix against official Nuvoton documentation to confirm exact package type and compliance status. Confirm that the intended application environment falls within the specified industrial temperature range of -40°C to +85°C. Ensure power supply rails match the analog (2.5V–3.6V) and digital core (1.71V–3.6V) requirements defined in the datasheet.

Codecs Selection Notes

Select this component for mono audio applications requiring integrated speaker driving capabilities. The built-in equalizer and ALC functions simplify system design for voice-centric environments. Verify compatibility with the host processor's digital audio interface modes, including I2S or PCM time slot assignment. Consider the low-power digital core operation if battery life is a critical constraint.

Codecs Part Context

The NAU88C14 is part of Nuvoton's wideband mono audio codec family. It shares functional similarities with other devices in the series but is specifically optimized for cost-effective voice telephony solutions. The integration of both line-level and high-power speaker outputs distinguishes it from simpler codecs lacking output drivers.

Codecs Replacement Considerations

NAU8814YG

Codecs FAQ

What is the maximum output power of the integrated speaker driver?

The integrated BTL speaker driver can deliver 1 Watt of power into an 8Ω load when supplied with 5V.

Does the NAU88C14 support digital companding?

Yes, the device supports μ-LAW and A-LAW companding for digital audio data transmission.

How is the microphone bias voltage generated?

The device includes an internal microphone bias generator accessible via the MICBIAS pin, which supplies the necessary voltage for connected microphones.