PCM1865 - 具有智能前端的 SW 控制、4 通道音频 ADC

PCM1865是TI德州仪器公司的一款音频ADC产品，PCM1865是具有智能前端的 SW 控制、4 通道音频 ADC，本站介绍了PCM1865的封装应用图解、特点和优点、功能等，并给出了与PCM1865相关的TI元器件型号供参考。

PCM1865 - 具有智能前端的 SW 控制、4 通道音频 ADC - 音频ADC - 音频转换器 - 德州仪器

产品特性

Universal Analog Mic Input, 2.1VRMS Full Scale
- 8 Analog Inputs with MUX and PGA
- Analog pre-mix function before PGA/MUX
- Single Ended, Pseudo-Differential or Differential Inputs with Mic Bias
- 4x Digital Microphone Inputs
Up to 4 Mono ADC channels (PCM1865)
Hardware Control (PCM1861)
I2C or SPI Control (PCM1863/5)
H/W Programmable Gain Amplifier
- Fixed Mic Pregain select : 20, 32dB (Analog)
S/W Programmable Gain Amplifier
Integrated High Performance Audio PLL
Single 3.3V Supply for Analog and Digital
- Additional 1.8V Core and Interface for lower power consumption
Power Dissipation at 3.3V: <85mW (PCM1861/3),<145mW (PCM1865)
'Energysense' Audio Content Detector - for auto system wakeup and sleep
Master or Slave Audio Interface:
Mixer functionality:
- Digital Mixer to mix ADC outputs and I2S synchronous inputs
- Zero Crossing PGA Gain changes
Automatic PGA Clipping Suppression control
PCB-footprint compatibility across all 3 devices

产品应用

Home Theater and TV
Automotive Head Units
Bluetooth® Speaker
Microphone Array Processors

产品说明

The PCM186x family of audio front-end devices takes a new approach to audio-function integration to ease compliance with European Ecodesign legislation while enabling high-performance end products. With no need for a 5-volt supply or an external programmable-gain amplifier, smaller, smarter products are feasible at reduced cost.

The PCM186x's highly flexible audio front end supports input levels from small-mV microphone inputs to 2.1VRMS line Inputs without external resistor dividers. The PCM186x family integrates many system-level functions that assist or replace some DSP functions.

All these features are available using a single 3.3V power supply. An integrated bandgap voltage reference provides excellent PSRR, so that a dedicated analog 3.3V rail may not be required.

产品器件信息

ORDER NUMBER	PACKAGE	BODY SIZE
PCM1861	TSSOP (30)	7.80mm × 4.40mm
PCM1863
PCM1865

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