Overview
The PGA2310UA/1KG4, produced by Texas Instruments, is a high-performance, stereo audio volume control designed for professional and high-end consumer audio systems. This device is capable of operating with analog power supplies ranging from ±4.5 V to ±15.5 V and a digital power supply from 4.5 V to 5.5 V. It features two independent audio channels, a serial control interface, and advanced functionalities such as zero crossing detection and a mute function. The PGA2310 is known for its low noise and distortion, wide gain and attenuation range, and the ability to drive 600-Ω loads directly without buffering.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Step Size | 0.5 | dB | |||
| Gain Error | Gain Setting = 31.5 dB | ±0.05 | dB | ||
| Gain Matching | ±0.05 | dB | |||
| Input Resistance | 10 | kΩ | |||
| Input Capacitance | 7 | pF | |||
| THD+N | VIN = 10 VPP, f = 1 kHz | 0.0004% | 0.001% | ||
| Dynamic Range | VIN = AGND, Gain = 0 dB | 116 | 120 | dB | |
| Interchannel Crosstalk | f = 1 kHz | -126 | dBFS | ||
| VA+ | Operating Voltage | 4.5 | 15 | 15.5 | V |
| VA- | Operating Voltage | -4.5 | -15 | -15.5 | V |
| VD+ | Operating Voltage | 4.5 | 5 | 5.5 | V |
| IA+ | VA+ = 15 V | 7.5 | 10 | mA | |
| IA- | VA- = -15 V | 7.7 | 10 | mA | |
| ID+ | VD+ = 5 V | 0.8 | 1.5 | mA |
Key Features
- Digitally-Controlled Analog Volume Control with two independent audio channels
- Serial Control Interface for programming gain settings
- Zero Crossing Detection for noise-free level transitions
- Mute Function activated via MUTE pin or gain setting
- Wide Gain and Attenuation Range: 31.5 dB to -95.5 dB with 0.5-dB steps
- Low Noise and Distortion: 0.0004% THD+N at 1 kHz
- Low Interchannel Crosstalk: -126 dBFS
- Ability to drive 600-Ω loads directly without buffering
- Available in DIP-16 and SOIC-16 packages
- Pin and software compatible with the PGA2311 and Cirrus Logic CS3310
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 operating voltage range for the PGA2310's analog power supplies?
The PGA2310 operates with its analog power supplies ranging from ±4.5 V to ±15.5 V.
- What is the digital power supply voltage range for the PGA2310?
The digital power supply voltage range is from 4.5 V to 5.5 V.
- How many independent audio channels does the PGA2310 have?
The PGA2310 has two independent audio channels.
- What is the gain and attenuation range of the PGA2310?
The gain and attenuation range is from 31.5 dB to -95.5 dB with 0.5-dB steps.
- What is the THD+N at 1 kHz for the PGA2310?
The THD+N at 1 kHz is 0.0004%.
- How does the zero crossing detection function work in the PGA2310?
The zero crossing detection function changes gain settings on a zero crossing of the input signal to minimize audible glitches. It is enabled or disabled using the ZCEN input pin.
- How can the mute function be activated in the PGA2310?
The mute function can be activated via the MUTE input pin or by setting the gain byte value for one or both channels to 00HEX.
- What are the package options available for the PGA2310?
The PGA2310 is available in DIP-16 and SOIC-16 packages.
- Is the PGA2310 compatible with other devices?
Yes, it is pin and software compatible with the PGA2311 and Cirrus Logic CS3310.
- What are the recommended layout guidelines for the PGA2310 on a PCB?
Texas Instruments recommends separate ground planes for the digital and analog sections, connected at a single point, and placing the PGA2310 so that it straddles the split between these ground planes.
