Overview
The PCM1860DBTR, part of the PCM186x family from Texas Instruments, is a highly integrated audio front-end device designed to enhance audio performance while reducing system complexity and cost. This 2-channel audio analog-to-digital converter (ADC) supports a wide range of input levels, from small millivolt microphone inputs to 2.1-V RMS line inputs, without the need for external resistor dividers. The device operates on a single 3.3-V power supply and integrates a programmable gain amplifier (PGA), mixer, and multiplexer, making it ideal for applications requiring interference suppression and high-performance audio.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 2 |
| ADC Sample Rate | 8 kHz to 192 kHz |
| Input Types | Single-ended, Differential, Pseudo-differential |
| Full-Scale Input | Single-ended: 2.1 V RMS, Differential: 4.2 V RMS |
| Signal-to-Noise Ratio (SNR) | 103 dB |
| Programmable Gain Amplifier (PGA) | Fixed Gain: 0 dB, 12 dB, 32 dB |
| Power Supply | Single 3.3 V |
| Power Dissipation | < 85 mW |
| Package | TSSOP (30) |
| Package Size | 7.80 mm × 4.40 mm |
Key Features
- High SNR performance with up to 103 dB SNR.
- Support for single-ended, differential, and pseudo-differential inputs.
- Integrated programmable gain amplifier (PGA) with fixed gain options of 0 dB, 12 dB, and 32 dB.
- Automatic PGA clipping suppression control to prevent signal clipping.
- Integrated high-performance audio PLL and on-chip phase locked loop (PLL).
- Master or slave audio interface with support for I2S, SPI, and hardware control.
- Energysense audio content detector for auto system wakeup and sleep.
- PCB-footprint compatibility across all devices in the PCM186x family.
Applications
- Audio recording devices such as digital voice recorders and audio mixers.
- Consumer electronics like smart speakers, soundbars, and home theaters.
- Professional audio equipment including microphones and audio interfaces.
- Automotive audio systems and infotainment systems.
- Medical devices requiring high-quality audio input.
Q & A
- What is the maximum ADC sample rate of the PCM1860DBTR?
The maximum ADC sample rate is 192 kHz.
- What types of input signals does the PCM1860DBTR support?
The device supports single-ended, differential, and pseudo-differential input signals.
- What is the full-scale input voltage for single-ended and differential modes?
For single-ended mode, the full-scale input voltage is 2.1 V RMS, and for differential mode, it is 4.2 V RMS.
- Does the PCM1860DBTR support digital microphones?
No, the PCM1860DBTR is a hardware-controlled device and does not support digital microphones. This feature is available in the software-controlled devices of the PCM186x family.
- What is the power supply requirement for the PCM1860DBTR?
The device operates on a single 3.3-V power supply.
- What is the typical power dissipation of the PCM1860DBTR?
The typical power dissipation is less than 85 mW.
- Does the PCM1860DBTR have automatic gain control?
The device has automatic PGA clipping suppression control but not full automatic gain control. Gain adjustments are typically managed through fixed gain settings or external control.
- What is the package type and size of the PCM1860DBTR?
The device comes in a TSSOP (30) package with dimensions of 7.80 mm × 4.40 mm.
- Can the PCM1860DBTR act as a master or slave in audio interfaces?
Yes, the device can operate as both a master and a slave in audio interfaces.
- What is the Energysense feature in the PCM1860DBTR?
The Energysense feature is an audio content detector that allows the system to automatically wake up or sleep based on the presence or absence of audio content.
