Date: 08/12/2008

Combined analog switch and audio amplifier IC offers space & cost saving

STMicroelectronics introduces the TS4961T, a combined analog switch and audio amplifier IC, which simplifies board design and saves space in cell phones and personal media players. Using this device, designers can implement both functions within a 3mm x 3mm QFN16 footprint instead of using two separate components. The new IC delivers best-in-class audio-source isolation, high amplifier performance and low power consumption.
The integrated audio switch is a dual SPST CMOS device that enables higher channel isolation than comparable combined amplifier/switch ICs. The filter-less class-D amplifier achieves less than 1% total harmonic distortion, low pop and click noise, and power supply rejection up to -63dB at 217Hz. The gain is adjusted using two external resistors.
Some of the other features are listed below:
1. The analog switch can achieve -80dB isolation
2. Optimized for use in battery-operated devices.
3. The combination switch/amplifier operates within 2.4V to 4.3V supply voltage range.
4. Consumes only 2mA operating current at 3V,
5. Has a 10nA shutdown mode.
6. The amplifier drives up to 1.6W into a 4-Ohm load, or 0.95W into an 8-Ohm load.
7. Thermal shutdown protection is also included.
Packaging: QFN16
Size: 3mm x 3mm
RoHS-compliant: Yes
Availability: The TS4961T is available immediately in sample/production quantities.
Pricing: $1.00 for orders over 1000 pieces.

For further information please visit: http://www.st.com/