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AT73C213
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MFG:ATMEL Package Cooled:QFN32 D/C:07+

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Part Number: AT73C213

MFG: ATMEL

Package Cooled: QFN32

D/C: 07+

Description: The AT73C213 is a fully integrated, low-cost, combined stereo audio DAC and audio power amplifier circuit targeted for ...

AT73C213 General Description

The AT73C213 is a fully integrated, low-cost, combined stereo audio DAC and audio power amplifier circuit targeted for Li-Ion or Ni-Mh battery powered devices such as mobile phones, smartphones, PDA, DECT phones, digital still cameras, music players or any other type of handheld device where an audio interface is needed.

The stereo DAC section is a complete high performance, stereo audio digital-to-ana-log converter delivering a 93 dB dynamic range. It comprises a multibit sigma-delta modulator with dither, continuous time analog filters and analog output drive circuitry. This architecture provides a high insensitivity to clock jitter. The digital interpolation fil-ter increases the sample rate by a factor of 8 using 3 linear phase half-band filters cascaded, followed by a first order SINC interpolator with a factor of 8. This filter elim-inates the images of baseband audio, retaining only the image at 64x the input sample rate, which is eliminated by the analog post filter. Optionally, a dither signal can be added that reduces possible noise tones at the output. However, the use of a multibit sigma-delta modulator already provides extremely low noise tone energy.

Master clock is from 256 or 384 times the input data rate, allowing choice of input data rate up to 50 kHz, including standard audio rates of 48, 44.1, 32, 16 and 8 kHz.

The DAC section is followed by a volume and mute control and can be simultaneously played back directly through a stereo 32 Ohm headset pair of drivers.Power Management for Mobiles (PM)AT73C213 Audio Interface for Portable Handsets 22744APMGMT27-Jan-05AT73C213

The stereo 32 Ohm headset pair of drivers also includes a mixer of a LINEL and LINER pair of stereo inputs, as well as a differential monaural auxiliary input (line level).

The DAC output can be connected through a buffer stage to the input of the audio power ampli-fier, using 2x coupling capacitors The mono buffer stage also includes a mixer of the LINEL and LINER inputs, as well as a differential monaural auxiliary input (line level) which can be, for example, the output of a voice Codec output driver in mobile phones.

The audio power amplifier is a dual-mode AB class amplifier with differential output and pro-grammable volume control. In full power mode, it is capable of driving an 8-ohm loudspeaker at maximum power of 1W at 5V supply and 440 mW at 3.6V supply. In low power mode, it can drive the same loudspeaker as an earpiece, making it suitable as a handsfree speaker driver in wireless handset application. The volume, mute, power down, de-emphasis controls and 16-bit, 18-bit and 20-bit audio formats are digitally programmable via a 4-wire SPI bus and the digital audio data are provided through a multi-format I2S interface.

AT73C213 Maximum Ratings

Operating Temperature
(Industrial)...........................................-40°C to +85°C

Storage Temperature........................-55°C to +150°C

Power Supply Input
on VBAT...................................................-0.3V to +5.5V

on VDIG, AVDD.........................................-0.3V to +3.6V

*NOTICE:Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reli-ability.

AT73C213 Features

•Stereo Audio DAC
2.7V to 3.3V Analog Supply Operation
2.4V to 3.3V Digital Supply Operation
20-bit Stereo Audio DAC
93 dB SNR Playback Stereo Channels
32 Ohm/20 mW Stereo Headset Drivers with Master Volume and Mute Controls
Stereo Line Level Input with Volume Control/mute and Playback through the Headset Drivers
Differential Monaural Auxiliary Input, with Volume Control/mute and Playback through the Headset Drivers
Accepts Mixed Signals from All Signal Paths (Line Inputs, External Mono and DAC Output)
8, 11.024, 16, 22.05, 24, 32, 44.1 and 48 kHz Sampling Rates
256x or 384xFs Master Clock Frequency
I2S Serial Audio Interface
•Mono Audio Power Amplifier
Supply Input from Main Li-Ion Battery
440mW on 8 Ohm Load
Low Power Mode for Earphone
Programmable Volume Control (-22 to +20 dB)
Fully Differential Structure, Input and Output
8 mA Drain Current in Full Power Mode
Power
-down mode (Consumption Less than 2uA)
Minimum External Components (Direct Connection of the Loudspeaker)
•Applications: Mobile Phones, Digital Cameras, PDAs, SmartPhones, DECT Phones, Music Players

AT73C213 datasheet

AT73C213
PDF/DataSheet Download

Datasheet: AT73C213
File Size: 772434 KB
Manufacturer: ATMEL [ATMEL Corporation]
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