Overview
The PGA2320IDWR, produced by Texas Instruments, is a high-performance stereo audio volume control designed for professional and high-end consumer audio systems. This component operates from ±15V analog power supplies, enabling it to process input signals with large voltage swings and preserve the dynamic range of the overall signal path. It features high-performance operational amplifier stages that provide low noise and distortion, and it can drive 600Ω loads directly without buffering. The PGA2320IDWR is fabricated in a mixed-signal BiCMOS process, leveraging superior analog characteristics, and includes a resistor network, an analog switch array, and a high-performance bipolar op amp stage.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VA+) | +4.5 | +15 | +15.5 | V |
| Supply Voltage (VA-) | -4.5 | -15 | -15.5 | V |
| Digital Supply Voltage (VD+) | +4.5 | +5 | +5.5 | V |
| Operating Temperature Range | -40 | +85 | °C | |
| Storage Temperature Range | -65 | +150 | °C | |
| Junction Temperature | +150 | °C | ||
| Step Size | 0.5 | dB | ||
| Gain Range | +31.5 | -95.5 | dB | |
| THD+N at 1kHz | 0.0003 | 0.001 | % | |
| Dynamic Range | 115 | 120 | dB | |
| Interchannel Crosstalk | -126 | dBFS | ||
| Output Noise (VIN = AGND, Gain = 0dB) | 10.5 | 17.5 | µVRMS |
Key Features
- Digitally-controlled analog volume control with a wide gain and attenuation range of +31.5dB to −95.5dB in 0.5dB steps.
- Low noise and distortion, with a dynamic range of 120dB and THD+N of 0.0003% at 1kHz.
- Low interchannel crosstalk of −126dBFS.
- Noise-free level transitions using zero crossing detection.
- Mute function that can be activated via the MUTE input or by setting the gain byte value to 00HEX.
- Three-wire serial control interface supporting daisy-chaining of multiple PGA2320 devices.
- Operates from ±15V analog power supplies and +5V digital power supply.
- Available in a 16-pin SOIC package.
Applications
- Audio amplifiers
- Mixing consoles
- Multi-track recorders
- Broadcast studio equipment
- Musical instruments
- Effects processors
- A/V receivers
- Car audio systems
Q & A
- What is the PGA2320IDWR used for?
The PGA2320IDWR is a high-performance stereo audio volume control used in professional and high-end consumer audio systems.
- What is the gain range of the PGA2320IDWR?
The gain range is from +31.5dB to −95.5dB in 0.5dB steps.
- What is the dynamic range of the PGA2320IDWR?
The dynamic range is 120dB.
- How does the PGA2320IDWR achieve noise-free level transitions?
It uses zero crossing detection to change gain settings on zero crossings of the input signal, minimizing audible glitches.
- Can the PGA2320IDWR be daisy-chained with other devices?
- What are the power supply requirements for the PGA2320IDWR?
- What is the mute function in the PGA2320IDWR?
The mute function can be activated via the MUTE input or by setting the gain byte value to 00HEX, switching the input multiplexer to analog ground.
- What is the package type of the PGA2320IDWR?
- What are some common applications of the PGA2320IDWR?
- How does the PGA2320IDWR handle interchannel crosstalk?
