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Product Detailed Parameters
- Description：IC AV SCART SWITCH 48LQFP
- Series：*
- Mfr：Asahi Kasei Microdevices/AKM
- Package：Tape & Reel (TR)
- Applications：-
- Multiplexer/Demultiplexer Circuit：-
- Switch Circuit：-
- Number of Channels：-
- On-State Resistance (Max)：-
- Voltage - Supply, Single (V+)：-
- Voltage - Supply, Dual (V±)：-
- -3db Bandwidth：-
- Features：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
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Overview
The AK4702EQ is a stereo digital-to-analog converter (DAC) integrated with an AV SCART switch, manufactured by Asahi Kasei Microdevices. It operates on a single 5V power supply and supports sampling rates from 32kHz to 96kHz. The device features a 24-bit DAC architecture with 128x oversampling and includes a built-in headphone amplifier. Key electrical specifications include a dynamic range of 105dB for the DAC section and a THD+N of -95dB at 1kHz. The analog audio switches within the SCART interface achieve a dynamic range of 96dB and a THD+N of -86dB at 2Vrms. The component is housed in a 48-pin LQFP package.
Feature Summary
- Integrates a high-performance stereo DAC with a comprehensive AV SCART switching matrix for set-top box applications.
- Includes a dedicated headphone amplifier output capable of driving low-impedance loads directly.
- Supports multiple digital audio interfaces including I2S, MSB/LSB justified formats, and TDM modes.
- Features pop-noise-free circuits for both audio and video sections to ensure silent operation during power transitions.
Applications
- Digital set-top boxes requiring integrated audio/video switching capabilities.
- Blu-ray players and DVD recorders needing compact AV routing solutions.
- Home theater systems utilizing SCART connections for TV and VCR integration.
- Digital television receivers with embedded audio processing requirements.
Procurement Notes
Verify the specific suffix 'EQ' against the manufacturer's current datasheet to confirm pinout compatibility and packaging dimensions. Confirm RoHS compliance status as manufacturing processes may evolve. Check for obsolescence notices or product change notifications prior to final design approval. Ensure the 48-pin LQFP footprint matches the target PCB layout exactly.
Selection Notes
Select this component when a combined DAC and AV switch solution is required to minimize board space. It is suitable for designs operating with a single 5V supply rail. Consider the 105dB dynamic range for high-fidelity audio paths. Verify that the SCART switching requirements align with the available inputs and outputs defined in the specification sheet.
Part Context
The AK4702EQ belongs to the AK4702 family of AV SCART switches with integrated DACs. It serves as a specialized solution for consumer electronics manufacturers aiming to reduce component count in digital video playback devices. The part replaces discrete DAC and analog switch combinations, simplifying the signal chain for standard definition and high definition audio/video routing.
Replacement Considerations
The AK4702 is listed as pin-compatible with the AK4707. Designers should verify if the AK4707 meets all functional requirements, particularly regarding the integrated DAC performance and specific SCART pin assignments before substitution.
