East-century launches with I2C volume control amplifier

2008 on July 7, Beijing East-century technology co., Ltd. announced the successful development 2C I with the volume control in high definition, 3D audio analog audio amplifier, the product code for the chip EMT9012 designed for portable electronic device applications, can be widely used in mobile phones, multifunctional radio, PDA, portable gaming devices, Internet devices, and portable DVD/CD/AAC/MP3 player.

It uses -28L QFN package.

In the definition and design EMT9012, Beijing East micro on domestic mobile phone industry, multi-functional portable radio product related chip needs intensive and extensive surveys.

For most users of common needs, formulate a EMT9012 three core design and development policy, i.e. for mainstream application standardization and compatibility, allowing manufacturers to quickly import production; second, and international colleagues fairly and even higher performance, and generation of factory optimization, and strive to achieve industry products cost-effective.

EMT9012 of working voltage of 5V 2.7V ~, the chip with integrated stereo speakers, stereo headphone audio amplifier that can be used to add hands-free telephone audio output and 2C I volume control digital interface.

The main technical indicators including:

Output power:

1.2W/per channel (5V, 8 ohm, THD + N = 1%);

500mW/per channel (3.3V, 8-ohm, THD + N = 1%);

70mW/per channel (5V, 32 ohm, THD + N = 1%);

33mW/per channel (32 ohm, 3.3V, THD + N = 1%).

Distortion: 400mW output THD + N = 0.017% (8ohm Horn load 5V);

30mW output T

HD + N = 0.028% (32 ohm headphones load 5V).

Output offset voltage: < 5mV;

Output noise: 36uV (trumpet), 14uV (headphones);

Power supply rejection ratio: 70dB.

More detailed technical parameters refer to the company's Web site, regarding this product's data sheet (Data Sheet).

http://www.eastmicrotech.com