AK4141EQ

Overview

The AK4141EQ is a NICAM/A2/EIA-J stereo decoder optimized for digital TV applications. It integrates an asynchronous sample rate converter (SRC) supporting input rates from 8kHz to 192kHz and output rates of 32kHz, 44.1kHz, or 48kHz. The device features five I2S inputs and three outputs, handling formats including Left/Right justified, I2S, and TDM. Audio processing includes a 5-band equalizer, automatic level control, and digital volume control ranging from +12dB to -115dB in 0.5dB steps. Power supplies are DVDD at 1.8V±0.1V, AVDD at 3.3V±0.3V, and TVDD at 1.7V–3.6V. Operating temperature ranges from -20°C to 85°C.

Feature Summary

• Supports automatic alignment-free decoding for NICAM, A2, and EIA-J standards with selectable carrier preferences.
• Integrates a high-performance asynchronous sample rate converter for flexible clock domain interfacing.
• Includes comprehensive audio processing capabilities such as a 5-band equalizer and stereo separation emphasis.
• Features a built-in S/PDIF transmitter with through mode for direct digital signal passthrough.

Applications

• Digital television systems
• Digital video recorders (DVR)
• AV receivers and processors

Procurement Notes

Verify the specific ordering suffix matches the required package and temperature range. Confirm that the I2C address pins are configured correctly for the system bus. Ensure power supply decoupling capacitors are placed close to the respective AVDD and DVDD pins as specified in the datasheet layout guidelines.

Selection Notes

Select this component when a single-chip solution for FM demodulation and digital stereo decoding is required. It is suitable for designs needing integrated SRC functionality to handle asynchronous audio sources without external converters. Consider the 48-pin LQFP package constraints during PCB layout planning.

Part Context

This part belongs to the AKM digital stereo decoder family designed for broadcast reception. It combines analog front-end processing for sound intermediate frequency signals with extensive digital audio manipulation blocks. The integration reduces the component count typically required for multi-standard TV audio processing chains.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

FAQ

What are the supported audio data formats?

The AK4141 supports MSB justified, LSB justified, I2S, and TDM formats for both input and output interfaces.

How is the master clock generated?

The device can use an external crystal connected to XTI/XTO pins or an external master clock signal on the MCKI pin. Internal oscillator settings depend on the selected sampling frequency.

Can the device operate in slave mode?

Yes, by setting the MSN pin to 'L', the AK4141 operates in slave mode where it receives LRCK and SCLK inputs rather than generating them.