AK7735EQ

Codecs Overview

The AK7735EQ is a highly integrated digital signal processor featuring dual DSP cores, two 24-bit stereo ADCs with MIC gain amplifiers and input selectors, two 32-bit stereo DACs, and two stereo sampling rate converters (SRC). It supports sampling frequencies up to 192kHz. The device includes four digital input ports and four digital output ports supporting TDM mode, along with independent LRCK/BICK ports. Control is managed via SPI or I2C interfaces. Operating temperature range is -20°C to 85°C. It is housed in a 48-pin LQFP package.

Codecs Feature Summary

• Dual RAM-based DSP cores with shared memory areas for acoustic effects and hands-free functions
• Integrated 24-bit stereo ADCs with channel-independent analog gain amplifiers and digital volume control
• Advanced 32-bit stereo DACs with channel-independent digital volume control and multiple digital filter options
• Stereo sampling rate converters supporting input and output frequencies from 8kHz to 192kHz

Codecs Applications

• Automotive audio devices
• Digital signal processing for audio/hands-free applications
• Acoustic effect processing systems

Codecs Procurement Notes

Verify the specific suffix 'EQ' indicates the commercial temperature range (-20°C to 85°C) compared to other variants like 'VQ'. Confirm pin compatibility and power supply requirements (AVDD, LVDD, TVDD, VDD33) during integration. Ensure proper handling of unused pins as specified in the datasheet to maintain signal integrity.

Codecs Selection Notes

Select this component when a single-chip solution for dual-channel audio processing with high-resolution conversion is required. Consider the shared memory architecture of the DSP cores for efficient resource allocation. Verify that the 48-pin LQFP package fits the PCB layout constraints and that the operating temperature range meets the environmental specifications of the target application.

Codecs Part Context

The AK7735EQ belongs to the AK7735 family of audio digital signal processors manufactured by Asahi Kasei Microdevices. It is designed for applications requiring high-performance audio processing with integrated analog-to-digital and digital-to-analog conversion capabilities. The device integrates dual DSPs, ADCs, DACs, and SRCs into a compact package.

Codecs Replacement Considerations

The AK7735AVQ is an automotive-grade variant with a wider operating temperature range (-40°C to 85°C). Check if the extended temperature range is necessary for the application environment.

Codecs FAQ

What is the maximum sampling frequency supported by the AK7735EQ?

The AK7735EQ supports sampling frequencies up to 192kHz for both ADC and DAC operations.

How are the DSP cores configured in the AK7735EQ?

The device features two identical DSP cores (DSP1 and DSP2) with shared memory areas for Program RAM, Coefficient RAM, Data RAM, and Delay RAM, which can be configured via control registers.

What digital interfaces are available for controlling the AK7735EQ?

The AK7735EQ supports SPI (up to 6MHz) and I2C (400kHz Fast Mode or 1MHz Fast Mode Plus) interfaces for microprocessor communication.