Overview
The PCM4222PFBR is a high-performance, two-channel analog-to-digital (A/D) converter designed by Texas Instruments for professional audio applications. It offers outstanding dynamic performance and supports 24-bit linear PCM, 1-bit Direct Stream Digital (DSD), and 6-bit modulator data outputs. This versatility makes the PCM4222 ideal for digital audio recording and processing applications. The device includes an on-chip, linear phase decimation filtering engine that supports Classic and Low Group Delay filter responses, suitable for both studio and live sound applications.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Dynamic Range (A-weighted, -60dB input) | 124 dB typical | dB |
| Dynamic Range (20kHz bandwidth, -60dB input) | 122 dB typical | dB |
| Total Harmonic Distortion + Noise (-1dB input, 20kHz bandwidth) | -108 dB typical | dB |
| PCM Output Sampling Rates | 8kHz to 216kHz | kHz |
| DSD Output Rates | 64x or 128x oversampled | - |
| Modulator Clock Frequency | 6.144MHz | MHz |
| Modulator Data Bits | 6-bit | - |
| Analog Power Supply | +4.0V nominal | V |
| Digital Power Supply | +3.3V nominal | V |
| Power Dissipation (48kHz sampling rate) | 305mW typical | mW |
| Power Dissipation (96kHz sampling rate) | 330mW typical | mW |
| Power Dissipation (192kHz sampling rate) | 340mW typical | mW |
| Package Type | TQFP-48 | - |
| RoHS Compliance | Yes | - |
Key Features
- Supports Linear PCM, 1-Bit Direct Stream Digital (DSD), and 6-bit modulator data outputs.
- Supports PCM output sampling rates from 8kHz to 216kHz.
- Choose from 64x or 128x oversampled output rates for DSD.
- Differential voltage inputs.
- On-chip voltage reference improves power supply noise rejection.
- Linear phase digital decimation filtering engine with Classic and Low Group Delay filter responses.
- Digital high-pass filtering to remove DC offset.
- Left and right channel filters may be disabled independently.
- PCM audio serial port interface with master or slave mode operation.
- Supports Left-Justified, I2S, and TDM data formats.
- Overflow indicators for the left and right channels.
- Low power dissipation with a power-down mode.
Applications
- Digital audio recorders and mixing desks.
- Digital live sound consoles.
- Digital audio effects processors.
- Surround sound encoders.
- Broadcast studio equipment.
- Audio test and measurement.
- Sonar systems.
- High-performance data acquisition.
Q & A
- What are the supported output formats of the PCM4222?
The PCM4222 supports 24-bit linear PCM, 1-bit Direct Stream Digital (DSD), and 6-bit modulator data outputs.
- What is the range of PCM output sampling rates supported by the PCM4222?
The PCM4222 supports PCM output sampling rates from 8kHz to 216kHz.
- What are the DSD output rates available on the PCM4222?
The DSD output supports either 64x or 128x oversampled bit rates.
- What type of power supplies does the PCM4222 require?
The PCM4222 requires a +4.0V nominal analog power supply and a +3.3V nominal digital power supply.
- What is the typical power dissipation of the PCM4222 at different sampling rates?
The typical power dissipation is 305mW at 48kHz, 330mW at 96kHz, and 340mW at 192kHz sampling rates.
- What package type is the PCM4222 available in?
The PCM4222 is available in a TQFP-48 package.
- Is the PCM4222 RoHS compliant?
Yes, the PCM4222 is RoHS compliant.
- What are some of the key applications of the PCM4222?
The PCM4222 is used in digital audio recorders, mixing desks, live sound consoles, audio effects processors, surround sound encoders, broadcast studio equipment, audio test and measurement, sonar systems, and high-performance data acquisition.
- Does the PCM4222 support different digital audio data formats?
Yes, the PCM4222 supports Left-Justified, I2S, and TDM data formats.
- Can the left and right channel filters be disabled independently on the PCM4222?
Yes, the left and right channel filters can be disabled independently.
