PGA2311U/1KG4

Overview

• Category: Integrated Circuit (IC)
• Use: Audio Volume Control
• Characteristics: Digital Programmable, Stereo, 2-Channel
• Package: QFN (Quad Flat No-Lead)
• Essence: Precision Volume Attenuator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications and Parameters

• Supply Voltage: 2.7V to 5.5V
• Number of Channels: 2
• Resolution: 64 Steps
• Attenuation Range: -95dB to +31.5dB
• Interface: I2C (Inter-Integrated Circuit)

Pin Configuration

The PGA2311U/1KG4 has a total of 20 pins. The detailed pin configuration is as follows:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VDD | Positive Power Supply | | 2 | SDA | I2C Serial Data Input | | 3 | SCL | I2C Serial Clock Input | | 4 | GND | Ground | | 5 | AINL | Left Channel Analog Input | | 6 | AINR | Right Channel Analog Input | | 7 | AGND | Analog Ground | | 8 | MUTE | Mute Control Input | | 9 | SD | Shutdown Control Input | | 10 | AVCC | Analog Power Supply | | 11 | VCOM | Common Mode Voltage Output | | 12 | VREF | Reference Voltage Output | | 13 | VOUTL | Left Channel Analog Output | | 14 | VOUTR | Right Channel Analog Output | | 15 | VCOM | Common Mode Voltage Output | | 16 | VREF | Reference Voltage Output | | 17 | VOUTL | Left Channel Analog Output | | 18 | VOUTR | Right Channel Analog Output | | 19 | AGND | Analog Ground | | 20 | VDD | Positive Power Supply |

Functional Characteristics

• Digital volume control with 64 steps of attenuation
• Independent left and right channel control
• Mute function for both channels
• Shutdown mode for power saving
• Low distortion and noise performance
• Wide supply voltage range for flexibility

Advantages and Disadvantages

Advantages: - Precise and accurate volume control - Easy integration into audio systems - Low distortion and noise levels - Flexible power supply options

Disadvantages: - Limited number of attenuation steps - Requires I2C interface for control

Applicable Range of Products

The PGA2311U/1KG4 is commonly used in various audio applications, including: - Home theater systems - Professional audio equipment - Car audio systems - Audio mixers and consoles - Amplifiers and receivers

Working Principles

The PGA2311U/1KG4 utilizes digital programmable attenuators to control the volume of audio signals. It receives control commands through the I2C interface and adjusts the attenuation level accordingly. The analog input signals are then attenuated and outputted through the analog outputs.

Detailed Application Field Plans

1. Home Theater System: The PGA2311U/1KG4 can be used as a volume control solution in home theater receivers, providing precise and adjustable volume levels for each channel.
2. Audio Mixer: In professional audio mixing consoles, the PGA2311U/1KG4 enables independent volume control of multiple audio sources, allowing for seamless audio mixing.
3. Car Audio System: By integrating the PGA2311U/1KG4 into car audio amplifiers, users can easily adjust the volume of their car audio system with high precision and minimal distortion.
4. Audio Interface: The PGA2311U/1KG4 can be used in audio interfaces to provide accurate volume control for recording and playback purposes, ensuring optimal audio quality.
5. Personal Audio Devices: Portable audio devices such as headphones and portable speakers can benefit from the PGA2311U/1KG4's precise volume control, enhancing the overall listening experience.

Detailed Alternative Models

• PGA2310: Similar to PGA2311U/1KG4 but without the I2C interface.
• MAX5486: Digital volume control IC with similar features and characteristics.
• NJW1195: Stereo digital volume control IC with extended attenuation range.

5 Common Technical Questions and Answers

1. Q: Can the PGA2311U/1KG4 be powered by a single supply voltage? A: Yes, the PGA2311U/1KG4 can operate within a supply voltage range of 2.