PGA2311UA

The PGA2311UA is a stereo digital volume control IC from Texas Instruments, designed for audio applications. It features 0.5dB step resolution, ±0.5dB channel matching, and a wide gain range (-95.5dB to +31.5dB). Controlled via SPI, it ensures low distortion (0.0004% THD+N) and high signal-to-noise ratio (120dB), making it ideal for preamps, AV receivers, and professional audio systems. Its mute function and zero-crossing detection minimize switching noise. The PGA2311UA operates on ±5V supplies and comes in a 16-pin SOIC package.
Key features:
- Digital volume control with precise attenuation
- Low noise & distortion for high-fidelity audio
- SPI interface for easy microcontroller integration
- Wide voltage supply range (±2.5V to ±5V)
Common applications include home theater systems, mixing consoles, and automotive audio. Its performance and ease of use make it a popular choice for high-quality audio level adjustment.

The PGA2311UA is a digital volume control IC. Equivalent or similar products include:
- CS3310 (Cirrus Logic)
- DS1802 (Maxim Integrated)
- MAX5486 (Maxim Integrated)
- TDA7448 (STMicroelectronics)
- M62429 (Mitsumi)
These chips offer comparable digital volume control with varying features like channel count, interface type, and THD performance. Check datasheets for exact compatibility.

The PGA2311UA is a 16-pin audio volume control IC in a SSOP package. Key functions include:
- Stereo Audio Control: Independent volume adjustment for two channels (left/right) via a serial interface.
- Digital Interface: Uses SPI-compatible serial communication (CS, SCLK, SDI pins).
- Analog I/O: Features balanced/unbalanced analog inputs (L/R IN±) and outputs (L/R OUT±).
- Wide Gain Range: +31.5dB to −95.5dB in 0.5dB steps, with mute function.
- Power Supply: Requires dual ±5V supplies (V+, V−) and a logic supply (VL).
Pins include CS (chip select), SCLK (clock), SDI (data in), MUTE, and analog I/O pins.

The PGA2311UA is available in a 16-pin SOIC (Small Outline Integrated Circuit) package. This surface-mount package is compact and widely used for audio applications, offering ease of soldering and integration into PCB designs. The SOIC-16 package dimensions are typically 10.3mm x 7.5mm with a 1.27mm pin pitch. It is RoHS-compliant and suitable for industrial and consumer audio systems.