Overview
The PCM1862DBTR, produced by Texas Instruments, is a 103-dB, 2-channel, software-controlled audio analog-to-digital converter (ADC) with a universal front end. This device is part of the PCM186x family, which is designed to integrate multiple audio functions, easing compliance with European Ecodesign legislation while enabling high-performance end products at reduced costs. The PCM1862DBTR operates on a single 3.3-V power supply and features an integrated programmable gain amplifier (PGA), making it suitable for a variety of audio applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Signal-to-Noise Ratio (SNR) | 103 dB |
| ADC Sample Rate | 8 kHz to 192 kHz |
| Number of ADC Channels | Up to 2 independent 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 | –12 dB to +32 dB (software-controlled) |
| Power Supply Voltage | 3.3 V |
| Power Dissipation | < 85 mW |
| Package Type | TSSOP-30 |
Key Features
- High SNR performance with 103 dB SNR.
- Software control via I2C or SPI interfaces.
- Integrated high-performance audio PLL.
- Support for up to four digital microphones.
- Automatic PGA clipping suppression control.
- Master or slave audio interface capability.
- Integrated band-gap voltage reference for excellent PSRR.
- PCB-footprint compatibility across all devices in the PCM186x family.
Applications
- Audio recording and playback devices.
- Smart speakers and voice assistants.
- Automotive audio systems.
- Consumer electronics requiring high-quality audio input.
- Industrial audio applications needing robust interference suppression.
Q & A
- What is the signal-to-noise ratio (SNR) of the PCM1862DBTR?
The SNR of the PCM1862DBTR is 103 dB.
- What are the supported ADC sample rates for the PCM1862DBTR?
The ADC sample rates range from 8 kHz to 192 kHz.
- What types of input signals does the PCM1862DBTR support?
The device supports single-ended, differential, and pseudo-differential input signals.
- How is the gain of the PGA controlled in the PCM1862DBTR?
The gain of the PGA is controlled via software using I2C or SPI interfaces.
- What is the power supply voltage requirement for the PCM1862DBTR?
The device operates on a single 3.3-V power supply.
- What is the typical power dissipation of the PCM1862DBTR?
The typical power dissipation is less than 85 mW.
- What package type is the PCM1862DBTR available in?
The device is available in a TSSOP-30 package.
- Does the PCM1862DBTR support digital microphones?
Yes, it supports up to four digital microphones.
- What is the purpose of the integrated band-gap voltage reference in the PCM1862DBTR?
The integrated band-gap voltage reference provides excellent power supply rejection ratio (PSRR), eliminating the need for a dedicated analog power rail.
- Is the PCM1862DBTR compatible with other devices in the PCM186x family in terms of PCB footprint?
Yes, it is PCB-footprint compatible with other devices in the PCM186x family.
