Overview
The PCM1863DBT, produced by Texas Instruments, is a 2-channel software-controlled audio analog-to-digital converter (ADC) with a universal front end. This device is part of the PCM186x family, which includes models such as PCM1860, PCM1861, PCM1862, PCM1864, and PCM1865. The PCM1863DBT is designed to integrate multiple audio functions, making it easier to comply with European Ecodesign legislation while enabling high-performance end products at reduced costs. It 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) with 30 pins |
| Operating Temperature Range | -40°C to 125°C |
| ADC Sample Rate | 8 kHz to 192 kHz |
| Signal-to-Noise Ratio (SNR) | 110 dB (PCM1861/63/65), 103 dB (PCM1860/62/64) |
| Input Types | Single-ended, differential, pseudo-differential |
| Full-Scale Input | Single-ended: 2.1 V RMS, Differential: 4.2 V RMS |
| Power Supply | Single 3.3 V |
| Power Dissipation | < 85 mW at 3.3 V |
| Control Interface | Software control via I2C or SPI |
Key Features
- High SNR performance: up to 110 dB SNR for PCM1861/63/65 and 103 dB SNR for PCM1860/62/64
- Flexible input support: single-ended, differential, and pseudo-differential inputs
- Programmable Gain Amplifier (PGA): software-controlled gain from –12 dB to +32 dB
- Integrated high-performance audio PLL and band-gap voltage reference
- Support for up to four digital microphones
- Automatic PGA clipping suppression control
- Energysense audio content detector for auto system wakeup and sleep
- Master or slave audio interface
Applications
The PCM1863DBT is suitable for various audio applications that require high-performance and low power consumption. These include:
- Automotive audio systems
- Consumer electronics such as audio recorders, soundbars, and home theaters
- Professional audio equipment
- Smart home devices with audio capabilities
- Portable audio devices like smartphones and tablets
Q & A
- What is the package type and pin count of the PCM1863DBT?
The PCM1863DBT comes in a TSSOP (DBT) package with 30 pins
- What is the operating temperature range of the PCM1863DBT?
The operating temperature range is -40°C to 125°C
- What are the supported ADC sample rates for the PCM1863DBT?
The ADC sample rates range from 8 kHz to 192 kHz
- What types of inputs does the PCM1863DBT support?
The device supports single-ended, differential, and pseudo-differential inputs
- What is the power supply requirement for the PCM1863DBT?
The device operates on a single 3.3 V power supply
- How is the gain controlled in the PCM1863DBT?
The gain is software-controlled via I2C or SPI, with a range from –12 dB to +32 dB
- Does the PCM1863DBT have any power-saving features?
Yes, it includes an Energysense audio content detector for auto system wakeup and sleep
- Can the PCM1863DBT operate as a master or slave in audio interfaces?
Yes, the device can operate as either a master or slave in audio interfaces
- What is the significance of the integrated high-performance audio PLL in the PCM1863DBT?
The integrated PLL generates real audio-rate clocks and eliminates the need for an external crystal oscillator circuit
- How does the PCM1863DBT handle clipping in audio signals?
The device has automatic PGA clipping suppression control, which lowers the gain in 0.5 dB steps when clipping is detected
