Burr Brown PGA2311 Based Volume Control Module 

Overview:

The PGA2311 is a high-performance, stereo audio volume control designed for professional and high-end consumer audio systems. This Module allows you to add 3 way Source Selection , a high precision volume control  a convenient Remote control and an LCD Display to your DIY Preamplifier . Unlike other Boards this one has the best parts for the Price that you can compare yourself through the details and the pictures. We also have a high quality Chassis with a full solid aluminum Front panel for this Module. The Chassis can be built for you on Order Basis.

Highlights:

• Texas Instruments' Burr-Brown PGA2311 Based digital volume control Preamplifier 
• Low-noise digital volume control with less than 0.0005% distortion 
• Amazing stereo separation -- better than 130 dB of separation
• Digitally-Controlled Analog Volume Control
• Two Independent Audio Channels
• Serial Control Interface
• Zero Crossing Detection
• 119 dB of volume control with Precise 1 db Steps -96db to 23db 
• Two-line Blue Backlit LCD display 
• Built in memory that saves all the settings in case of Standy By and power failure ( This feature is not avaliable on cheaper boards)
• Ultimate high fidelity volume controller
• Best Parts For the Price Vishay / Elna Cerafine Caps 
• Fully Independent Signal and Power Ground
• Card type Compact Remote Control

Description:
The PGA2311 is a high-performance, stereo audio volume control designed for professional and high-end consumer audio systems. Using high performance operational amplifier stages internal to the PGA2311 yields low noise and distortion, while providing the capability to drive 600? loads directly without buffering.The heart of the PGA2311 is a resistor network, an analog switch array, and a high-performance op amp stage. The switches are used to select taps in the resistor network that, in turn, determine the gain of the amplifier stage. Switch selections are programmed using a serial control port. The PGA2311 includes a zero crossing detection function that can provide for noise-free level transitions. The concept is to change gain settings on a zero crossing of the input signal, thus minimizing audible glitches .The zero crossing detection takes effect with a change in gain setting for a corresponding channel. The new gain setting will not be implemented until either positive slope zero crossing is detected or a time-out period of 16ms has elapsed. In the case of a time-out, the new gain setting takes effect with no attempt to minimize audible artifacts. This Board Features a fully Independent Signal And Power ground .

Working:
Digital Encoder:
A digital rotary encoder, featuring 1 dB detents and a 5" pigtail harness, is included for precise local volume adjustments. Clicking the encoder changes the selected source from one of the three stereo inputs.

LCD Brightness Control:
The two-line LCD display (with 11" pigtail harness) uses a potentiometer on the rear for adjustable brightness.

Remote Control Can be used For the Following Functions :
Power On / Standby 
Volume Up
Volume Down
Input Select

Operating Voltage 9v-0-9v to 12v-0-12v AC