The WM9701 is a low power, full duplex stereo codec with integrated touch screen controller designed for portable audio and multimedia applications. It's a highly integrated device that incorporates a variety of functions, including analog-to-digital converters (ADCs) and digital-to-analog converters (DACs), along with a touch screen controller interface.
Applications:
- PDAs (Personal Digital Assistants)
- Portable Media Players (PMPs)
- Smartphones
- Tablet Computers
- Any battery-powered device requiring audio and touch screen functionality
Features:
- Stereo ADC and DAC: High-quality audio conversion for both recording and playback.
- Integrated Touch Screen Controller: Simplifies touch screen implementation and reduces external component count.
- Low Power Consumption: Optimised for battery-powered devices, extending battery life.
- Full Duplex Operation: Allows simultaneous recording and playback.
- Flexible Audio Interface: Supports various audio data formats and sampling rates.
- I2C Control Interface: Provides easy access for configuration and control.
- Microphone Bias: Integrated microphone bias circuitry eliminates the need for external components.
- Headphone Driver: Integrated headphone amplifier for direct headphone connection.
Benefits:
- Reduced Component Count: Integration of audio codec and touch screen controller minimizes the number of external components required.
- Lower Power Consumption: Enables longer battery life in portable devices.
- Improved Audio Quality: High-performance ADCs and DACs deliver superior audio performance.
- Simplified Design: Easy-to-use I2C control interface simplifies system integration.
- Cost-Effective: Integration reduces overall system cost.
- Faster Time-to-Market: Simplified design and integration accelerate product development.
Additional Details:
The WM9701 typically operates from a low voltage supply (e.g., 3.3V). It features programmable gain amplifiers (PGAs) for both ADC and DAC paths, allowing for flexible audio level adjustment. The touch screen controller supports 4-wire resistive touch screens and provides accurate touch position detection. The device is available in a compact package, making it suitable for space-constrained applications. It supports various audio formats like PCM and I2S.
