Overview
The PGA4311UA is a high-performance, digitally controlled analog volume control IC manufactured by Texas Instruments. Designed for audio applications, this 4-channel device supports a wide gain and attenuation range, making it ideal for professional audio systems, home theaters, and automotive audio solutions. Its market positioning targets engineers and designers seeking precise volume control with low noise and distortion. The PGA4311UA stands out for its dynamic range, low THD+N, and interchannel crosstalk performance, ensuring superior audio quality.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Gain Range | +31.5 to -95.5 | dB | 0.5dB steps |
| THD + Noise | 0.0002 | % | @1kHz |
| Power Supply | ±5V, 5V | V | |
| Operating Temperature | -40 to +85 | °C | |
| Dynamic Range | 120 | dB | |
| Interchannel Crosstalk | -130 | dBFS | @1kHz |
| Load Impedance | 100 | kOhms | |
| Gain Error | ±0.05 | dB | @gain=31.5dB |
| Voltage Swing | 7.5 | Vpp | with max supply |
| Package | SOIC-28 |
Key Features
- Four independent audio channels for precise volume control.
- Wide gain and attenuation range (+31.5dB to -95.5dB) with 0.5dB steps.
- Low THD+N (0.0002%) ensures high audio fidelity.
- Dynamic range of 120dB for clear audio reproduction.
- Interchannel crosstalk of -130dBFS minimizes signal interference.
- Serial control interface for easy integration into digital systems.
- Zero crossing detection for noise-free level transitions.
- Mute function for quick audio cutoff.
Applications
The PGA4311UA is widely used in professional audio systems, home theater setups, and automotive audio solutions. Its precise volume control and low distortion make it ideal for high-fidelity audio applications. In professional audio systems, it ensures accurate signal management, while in home theaters, it enhances the listening experience with clear and dynamic sound. Automotive audio systems benefit from its robust performance and ability to handle varying environmental conditions.
Q & A
1. What is the gain range of the PGA4311UA?
The gain range is +31.5dB to -95.5dB with 0.5dB steps.
2. What is the THD+N performance of this device?
The THD+N is 0.0002% at 1kHz.
3. What power supply does the PGA4311UA require?
It operates on ±5V or 5V power supplies.
4. What is the operating temperature range?
The device operates between -40°C and +85°C.
5. What is the dynamic range of the PGA4311UA?
The dynamic range is 120dB.
6. How does the PGA4311UA minimize interchannel crosstalk?
It achieves -130dBFS interchannel crosstalk at 1kHz.
7. What is the load impedance supported by this device?
It supports a load impedance of 100kOhms.
8. What is the gain error at maximum gain?
The gain error is ±0.05dB at a gain of 31.5dB.
9. What is the voltage swing with maximum supply?
The voltage swing is 7.5Vpp.
10. What package does the PGA4311UA come in?
It is available in an SOIC-28 package.
