PGA2311

www.ti.com

SBOS218B – DECEMBER 2001 – REVISED JANUARY 2016

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The PGA2311 is commonly used as a digitally controlled analog volume control. Analog volume is controlled

through a serial interface in 0.5-dB steps, ranging from a gain of +31.5 dB down to an attenuation of

−95.5 dB.

8.2 Typical Application

Figure 13 shows the recommended connections for the PGA2311. Power-supply bypass capacitors should be

placed as close to the PGA2311 package as physically possible.

Figure 13. Recommended Connection Diagram

8.2.1 Design Requirements

•

Wide dynamic range, +35.5 dB to –95.5 dB

•

Operate from 5-V digital supply and ±5-V analog supplies

•

Digitally-controlled analog volume

8.2.2 Detailed Design Procedure

The PGA2311 is a complete digitally controlled analog stereo volume controller system on a chip requiring only a

controller to select the gain or attenuation through a serial interface. Figure 13 shows the basic connections to

the PGA2311. Power-supply bypass capacitors should be placed as close to the PGA2311 package as

physically possible.

Copyright © 2001–2016, Texas Instruments Incorporated

Submit Documentation Feedback

13

Product Folder Links: PGA2311