Overview
The PCM1865DBTR, produced by Texas Instruments, is a high-performance 4-channel software-controlled audio analog-to-digital converter (ADC) with a universal front end. This device is part of the PCM186x family, which includes PCM1860, PCM1861, PCM1862, PCM1863, PCM1864, and PCM1865. These devices are designed to integrate multiple audio functions, easing compliance with European Ecodesign legislation while enabling the development of high-performance end products at reduced costs. The PCM1865 operates on a single 3.3-V power supply and features an integrated programmable gain amplifier (PGA) in a compact TSSOP (DBT) package with 30 pins.
Key Specifications
| Specification | Value |
|---|---|
| Package | TSSOP (DBT) - 30 pins |
| Operating Temperature Range | -40°C to 125°C |
| SNR Performance | 110 dB (PCM1861/63/65), 103 dB (PCM1860/62/64) |
| ADC Sample Rate | 8 kHz to 192 kHz |
| Input Types | Single-ended (2.1-V RMS), Differential (4.2-V RMS) |
| Control Interface | Software (I2C or SPI) |
| Programmable Gain Amplifier (PGA) | SW-Controlled Gain: –12 dB to +32 dB |
| Power Supply | Single 3.3-V |
| Power Dissipation at 3.3 V | < 145 mW |
Key Features
- High SNR performance with up to 110 dB SNR for PCM1861/63/65 models.
- Support for up to four independent ADC channels.
- Integrated programmable gain amplifier (PGA) with software-controlled gain from –12 dB to +32 dB.
- Support for single-ended, differential, and pseudo-differential inputs.
- Integrated high-performance audio PLL.
- Automatic PGA clipping suppression control.
- Energysense audio content detector for auto system wakeup and sleep.
- Master or slave audio interface.
- PCB-footprint compatibility across all devices in the PCM186x family.
Applications
The PCM1865DBTR is suitable for a variety of audio applications that require high-performance and low power consumption. These include:
- Audio recording devices such as digital voice recorders and audio interfaces.
- Consumer electronics like smart speakers, soundbars, and home theaters.
- Automotive audio systems that need to comply with European Ecodesign legislation.
- Professional audio equipment such as mixers and audio processors.
- Devices requiring interference suppression and high SNR performance.
Q & A
- What is the package type of the PCM1865DBTR?
The PCM1865DBTR comes in a TSSOP (DBT) package with 30 pins.
- What is the operating temperature range of the PCM1865DBTR?
The operating temperature range is -40°C to 125°C.
- What are the SNR performance levels of the PCM1865DBTR?
The SNR performance is up to 110 dB for PCM1861/63/65 models and 103 dB for PCM1860/62/64 models.
- What are the supported ADC sample rates for the PCM1865DBTR?
The ADC sample rate ranges from 8 kHz to 192 kHz.
- What types of inputs does the PCM1865DBTR support?
The device supports single-ended (2.1-V RMS) and differential (4.2-V RMS) inputs.
- How is the gain of the PGA controlled in the PCM1865DBTR?
The gain of the PGA is controlled via software using I2C or SPI interfaces.
- What is the power supply requirement for the PCM1865DBTR?
The device operates on a single 3.3-V power supply.
- What is the power dissipation of the PCM1865DBTR at 3.3 V?
The power dissipation is less than 145 mW at 3.3 V.
- Does the PCM1865DBTR support digital microphones?
Yes, it supports up to four digital microphones with software-controlled gain options.
- What is the Energysense feature in the PCM1865DBTR?
The Energysense feature is an audio content detector that enables auto system wakeup and sleep modes.
