821024J

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821024J is an interface IC which is also known as a CODEC (Coder and Decoder). This type of IC is responsible for encoding and decoding both digital and analog signals. It is manufactured by Atmel and is widely used in a variety of applications including consumer electronics, automotive audio systems, medical equipment and communications systems.

The 821024J CODEC is a high-performance device that combines an Analog-to-Digital Converter (ADC) and a Digital-to-Analog Converter (DAC) in one package. It has integrated anti-aliasing and output reconstruction filters, a low noise microphone bias voltage and a low distortion output for improved audio quality. It is designed for applications that require a wide dynamic range and low power consumption.

The 821024J consists of a 12-bit SAR (Successive Approximation Register) ADC, a 10-bit D/A converter, a half-wave rectifier for its Anti-Aliasing Filter (AAF) and a low-pass filter for its Output Reconstruction Filter (ORF). The ADC has an input range from 0.2 V to 3.6 V and the DAC has an output range from 0 V to 5 V. It operates on a 3 V or 5 V power supply and has a maximum power consumption of 1 W.

The ADC in 821024J interfaces directly with analog signals, including microphones and microphones with preamps. The digital output data can then be transferred to a processor or other digital logic. The DAC receives digital inputs and converts them back to analog outputs.

The 821024J\'s ADC can be configured to support a variety of input modes, such as single-ended or differential, unipolar or bipolar, and sampling rates of up to 48 kHz. It also provides Closed Loop Gain and Data Rejection Control (DRAC) for improved noise and distortion performance.

The 821024J\'s DAC also supports a variety of output configurations including single-ended or differential and unipolar or bipolar. Output resolution of up to 24 bits is supported, and the DAC can provide analog voltage outputs up to 5 V peak-to-peak. The DAC also supports a Serial Audio and I2S buses for interfacing with digital audio processors.

The 821024J CODEC is widely used in applications such as audio systems and portable audio devices. It can provide high-performance audio quality, with low power consumption and low noise. It is also widely used in medical and communications applications due to its wide dynamic range and configurability.

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