PCM1864 - 具有智能前端的 SW 控制、4 通道音频 ADC

PCM1864是TI德州仪器公司的一款音频ADC产品，PCM1864是具有智能前端的 SW 控制、4 通道音频 ADC，本站介绍了PCM1864的封装应用图解、特点和优点、功能等，并给出了与PCM1864相关的TI元器件型号供参考。

PCM1864 - 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, 2.1 VRMS Full Scale
- 8 Analog Input Pins 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 (PCM1864)
Hardware Control (PCM1860)
I2C or SPI Control (PCM1862/4)
H/W Programmable Gain Amplifier
- Fixed Mic Pregain Select: 20, 32 dB (Analog)
S/W Programmable Gain Amplifier
Integrated High Performance Audio PLL
Single 3.3 V Supply for Analog and Digital
- Additional 1.8 V Core and Interface for Lower Power Consumption
Power Dissipation at 3.3 V: <85 mW (PCM1860/2),<145 mW (PCM1864)
'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 Devices
Qualified in Accordance With AEC-Q100 for Automotive Applications

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-V 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 2.1 VRMS 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 3.3-V power supply. An integrated bandgap voltage reference provides excellent PSRR, so that a dedicated analog 3.3-V rail may not be required.

Block diagrams comparing the devices in the PCM186x can be found in Functional Block Diagram.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
PCM1860	TSSOP (30)	7.80 mm × 4.40 mm
PCM1862
PCM1864

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