STMicroelectronics Introduces High-quality Audio Amplifier for Mobile Equipment

Mar 04, 2005

STMicroelectronics has introduced a 1.2W audio amplifier with one differential mono input, for use in mobile phones, laptops, PDAs and portable audio devices.
The TS4994 is a fully differential audio power amplifier capable of delivering 1.2W of continuous RMS power into an 8 ohm load at 5V, with a total harmonic distortion of 1%, measured at 1KHz. The differential design means the part has good noise immunity with an 85dB common mode rejection ratio and 100dB power supply rejection ratio, both at 217Hz with grounded inputs. The part has also been designed to avoid pops and clicks.

The amplifier runs off a supply of 2.5V to 5.5V. It has a standby mode, which can be set by a signal that can be programmed to be active high or low. Standby mode cuts power consumption to 10nA. This is complemented by an ultra-fast start-up time of 15ms.

Other features include thermal shutdown protection, to protect against short circuits. Common-mode feedback circuitry enables the outputs to be biased to half the supply voltage, regardless of the input common-mode voltage.

The TS4994 is available in a nine-bump, 0.5mm-pitch flip-chip package; as a DFN10 or as a MiniSO-8 part. Pricing is US$0.60 in quantities of 5K pieces.

Explore further: Solar Impulse departs Myanmar for China

add to favorites email to friend print save as pdf

Related Stories

Shocking recording of elephant slaughter

Nov 21, 2013

The Wildlife Conservation Society released a powerful video today that features shocking audio of an elephant being shot and killed by ivory poachers in Central Africa. The video is part of WCS's 96 Elephants campaign – ...

Recommended for you

Solar Impulse departs Myanmar for China

7 hours ago

Solar Impulse 2 took off from Myanmar's second biggest city of Mandalay early Monday and headed for China's Chongqing, the fifth flight of a landmark journey to circumnavigate the globe powered solely by ...

DARPA seeks new positioning, navigation, timing solutions

Mar 28, 2015

The Defense Advanced Research Projects Agency (DARPA), writing about GPS, said: "The military relies heavily on the Global Positioning System (GPS) for positioning, navigation, and timing (PNT), but GPS access is easily blocked by methods such as jamming. In addition, many environments in which our mil ...

Future US Navy: Robotic sub-hunters, deepsea pods

Mar 28, 2015

The robotic revolution that transformed warfare in the skies will soon extend to the deep sea, with underwater spy "satellites," drone-launching pods on the ocean floor and unmanned ships hunting submarines.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.