Overview
The PCM1821IRTER is a high-performance, stereo-channel, 32-bit analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the Burr-Brown™ audio ADC family and is designed for high-quality audio applications. It supports sample rates from 8 kHz to 192 kHz and features a dynamic range of up to 106 dB, making it suitable for a wide range of audio recording and playback systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Sample Rate | 8 kHz to 192 kHz | - |
| Dynamic Range | 106 dB | - |
| Total Harmonic Distortion + Noise (THD+N) | -95 dB | - |
| Input Signal Bandwidth | Up to 80 kHz | - |
| Input Type | Differential analog input | - |
| Full-Scale Input | 2 VRMS | - |
| Analog Supply Voltage | 3.3 V | V |
| Digital I/O Supply Voltage | 1.8 V or 3.3 V | V |
| Power Consumption (per channel at 16 kHz sample rate) | 19.6 mW | mW |
| Package Type | 20-pin WQFN (3x3 mm, 0.5-mm pitch) | - |
Key Features
- Stereo high-performance ADC with 2-channel analog microphone or line-in inputs.
- Flexible audio serial data interface supporting master or slave mode, 32-bit, 2-channel TDM, and 32-bit, 2-channel I2S.
- Integrated high-performance audio PLL and automatic power-down upon loss of audio clocks.
- Linear-phase or low-latency filter selection.
- Single-supply operation with analog and digital supply voltage options.
- High input impedance (10 kΩ, 2.5 kΩ, 20 kΩ) and good common-mode rejection ratio (CMRR) of up to 60 dB.
Applications
The PCM1821IRTER is suitable for various high-quality audio applications, including:
- Professional audio equipment such as recording studios and live sound systems.
- Consumer audio devices like high-end audio players and home theaters.
- Automotive audio systems requiring high fidelity and robust performance.
- Medical and industrial applications where precise audio signal conversion is necessary.
Q & A
- What is the sample rate range of the PCM1821IRTER?
The sample rate range is from 8 kHz to 192 kHz.
- What is the dynamic range of the PCM1821IRTER?
The dynamic range is up to 106 dB.
- What types of audio interfaces does the PCM1821IRTER support?
The device supports 32-bit, 2-channel TDM and 32-bit, 2-channel I2S interfaces in both master and slave modes.
- What is the power consumption of the PCM1821IRTER per channel at a 16 kHz sample rate?
The power consumption is 19.6 mW per channel.
- What are the supply voltage options for the PCM1821IRTER?
The device operates with an analog supply voltage of 3.3 V and digital I/O supply voltage options of 1.8 V or 3.3 V.
- Does the PCM1821IRTER have integrated clock management?
Yes, it includes an integrated high-performance audio PLL.
- What is the package type of the PCM1821IRTER?
The device is packaged in a 20-pin WQFN (3x3 mm, 0.5-mm pitch).
- What are the key applications of the PCM1821IRTER?
It is used in professional audio equipment, consumer audio devices, automotive audio systems, and medical/industrial applications.
- Does the PCM1821IRTER support automatic power-down?
Yes, it features automatic power-down upon loss of audio clocks.
- What is the input impedance of the PCM1821IRTER?
The input impedance is 10 kΩ, 2.5 kΩ, or 20 kΩ.
