Overview
The Texas Instruments PCM1861DBTR is a high-performance, 2-channel hardware-controlled audio analog-to-digital converter (ADC) with a universal front end. This device is part of the PCM186x family, designed to integrate multiple audio functions, making it ideal for applications requiring high signal-to-noise ratio (SNR) and flexibility in input configurations. The PCM1861DBTR supports single-supply operation at 3.3 V and features an integrated programmable gain amplifier (PGA), which simplifies the design and reduces the cost of audio systems.
Key Specifications
| Parameter | Value |
|---|---|
| Signal-to-Noise Ratio (SNR) | 110 dB |
| ADC Sample Rate (fS) | 8 kHz to 192 kHz |
| Number of Independent ADC Channels | Up to 2 channels |
| Input Types | Single-ended, differential, pseudo-differential |
| Full-Scale Input Levels | Single-ended: 2.1 V RMS, Differential: 4.2 V RMS |
| Programmable Gain Amplifier (PGA) Gain | Fixed: 0 dB, 12 dB, 32 dB |
| Power Supply | Single 3.3 V |
| Power Dissipation | < 85 mW |
| Package | TSSOP (30 pins), 7.80 mm × 4.40 mm |
Key Features
- High SNR performance of 110 dB, ensuring high-quality audio conversion.
- Support for single-ended, differential, and pseudo-differential inputs, enhancing flexibility and interference suppression.
- Integrated programmable gain amplifier (PGA) with fixed gain options of 0 dB, 12 dB, and 32 dB.
- Integrated high-performance audio phase-locked loop (PLL) for generating audio-rate clocks.
- Automatic PGA clipping suppression control to prevent signal distortion.
- Energysense audio content detector for auto system wakeup and sleep modes.
- Master or slave audio interface capability, with the ability to generate all necessary I2S clocks internally or accept them from an external source.
- PCB-footprint compatibility across all devices in the PCM186x family.
Applications
- Audio recording and playback devices, such as digital voice recorders and audio interfaces.
- Consumer electronics, including smart speakers, soundbars, and home theaters.
- Automotive audio systems, where high SNR and low power consumption are critical.
- Industrial audio applications, such as public address systems and audio monitoring equipment.
- Medical devices requiring high-quality audio input, such as stethoscopes and medical recorders.
Q & A
- What is the signal-to-noise ratio (SNR) of the PCM1861DBTR?
The SNR of the PCM1861DBTR is 110 dB.
- What are the supported ADC sample rates for the PCM1861DBTR?
The ADC sample rates range from 8 kHz to 192 kHz.
- What types of input configurations are supported by the PCM1861DBTR?
The device supports single-ended, differential, and pseudo-differential input configurations.
- What are the fixed gain options available for the PGA in the PCM1861DBTR?
The fixed gain options are 0 dB, 12 dB, and 32 dB.
- Does the PCM1861DBTR support both master and slave audio interface modes?
- What is the power supply requirement for the PCM1861DBTR?
The device operates on a single 3.3 V power supply.
- How much power does the PCM1861DBTR typically dissipate?
The power dissipation is less than 85 mW.
- What is the package type and size of the PCM1861DBTR?
The device is packaged in a TSSOP (30 pins) with dimensions of 7.80 mm × 4.40 mm.
- Does the PCM1861DBTR have an integrated audio PLL?
- What is the Energysense feature in the PCM1861DBTR?
The Energysense feature is an audio content detector that enables auto system wakeup and sleep modes.
