Overview
The PCM4220PFB from Texas Instruments is a high-performance, two-channel, 24-bit analog-to-digital converter (ADC) designed for professional audio applications. This multi-bit delta-sigma (ΔΣ) ADC supports output sampling rates from 8 kHz to 216 kHz, making it ideal for digital audio recording and processing. The device features a linear phase digital decimation filtering engine with both Classic and Low Group Delay filter responses, optimizing it for studio or live sound applications. Additionally, it includes digital high-pass filtering for DC offset removal and supports various audio data formats such as Left-Justified, I2S, and TDM.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24-bit | |
| Sampling Rate | 8 kHz to 216 kHz | |
| Analog Input Voltage Range | –0.3V to +6.0V | V |
| Digital Supply Voltage | +2.4V to +3.6V | V |
| Analog Supply Voltage | +3.8V to +4.2V | V |
| Total Power Dissipation (typical) | 305 mW (at fS = 48 kHz) | mW |
| Dynamic Range (typical) | 123 dB (A-weighted, –60 dB input) | dB |
| THD+N (typical) | –108 dB (f = 997 Hz, –1 dB input) | dB |
| Package Type | TQFP-48 (7x7 mm) | |
| Operating Temperature Range | –40°C to +85°C | °C |
Key Features
- Digital high-pass filtering for DC offset removal
- Supports Left-Justified, I2S, and TDM audio data formats
- Linear phase digital decimation filtering engine with Classic and Low Group Delay responses
- On-chip voltage reference for improved power-supply noise rejection
- Overflow indicators for the left and right channels
- Master or Slave mode operation
- Differential voltage inputs
- Output word length reduction (16-bit, 18-bit, 20-bit, 24-bit)
Applications
The PCM4220PFB is ideal for a variety of digital audio recording and processing applications, including:
- Professional audio equipment
- Studio recording systems
- Live sound systems
- Multi-channel audio systems
- Audio interfaces and converters
Q & A
- What is the resolution of the PCM4220PFB ADC?
The PCM4220PFB has a 24-bit resolution.
- What are the supported sampling rates for the PCM4220PFB?
The PCM4220PFB supports output sampling rates from 8 kHz to 216 kHz.
- What are the different filter responses available on the PCM4220PFB?
The device features both Classic and Low Group Delay filter responses.
- What types of audio data formats does the PCM4220PFB support?
The PCM4220PFB supports Left-Justified, I2S, and TDM audio data formats.
- What is the typical total power dissipation of the PCM4220PFB at a sampling rate of 48 kHz?
The typical total power dissipation is 305 mW at a sampling rate of 48 kHz.
- What is the dynamic range of the PCM4220PFB?
The dynamic range is typically 123 dB (A-weighted, –60 dB input).
- What is the THD+N performance of the PCM4220PFB?
The THD+N is typically –108 dB (f = 997 Hz, –1 dB input).
- What is the package type of the PCM4220PFB?
The PCM4220PFB is available in a TQFP-48 (7x7 mm) package.
- What is the operating temperature range of the PCM4220PFB?
The operating temperature range is –40°C to +85°C.
- Does the PCM4220PFB have on-chip voltage reference?
Yes, the PCM4220PFB includes an on-chip voltage reference for improved power-supply noise rejection.
