This document introduces the characteristics of the Texas Instruments PGA2311 chip, including digitally controlled analog volume control, two independent audio channels, serial control interface, zero crossing detection, mute function, wide gain and attenuation range, low noise and distortion, noise-free level transitions, low interchannel crosstalk, power supplies, available packages, application scenarios, etc.
The PGA2311 is a high-performance stereo audio volume control designed for professional and high-end consumer audio systems. It utilizes high-performance operational amplifier stages to achieve low noise and distortion, capable of driving 600Ω loads directly without buffering. The device features a 3-wire serial control interface that supports connection to various host controllers and allows for daisy-chaining multiple units.
Key features include a wide gain and attenuation range from +31.5dB to -95.5dB in 0.5dB steps, zero crossing detection, and a mute function. The device is available in DIP-16 and SO-16 packages and is pin and software compatible with the CS3310. It operates with +5V analog and digital power supplies.
| Gain Range | +31.5dB to -95.5dB |
|---|---|
| Step Size | 0.5dB |
| THD+N (U-Grade) | 0.0004% at 1kHz |
| THD+N (A-Grade) | 0.0002% at 1kHz |
| Dynamic Range | 120dB |
| Interchannel Crosstalk | -130dBFS |
| Operating Voltage | +5V Analog, +5V Digital |
| Available Packages | DIP-16 and SO-16 |
Yes, the PGA2311 is pin and software compatible with the Crystal CS3310.
Yes, the serial control interface supports daisy-chaining of multiple PGA2311 devices.