PCM1865DBTRG4.A中文资料德州仪器数据手册PDF规格书

1 Features

1• High SNR Performance:

– 110-dB SNR (PCM1861/63/65)

– 103-dB SNR (PCM1860/62/64)

• ADC Sample Rate (fS) = 8 kHz to 192 kHz

• Up To Four Independent ADC Channels Available

• Single-Ended, 2.1-VRMS Full-Scale (FS) Input

• Differential, 4.2-VRMS FS Input

• Hardware (HW) Control: PCM1860/61

• Software (SW) Control (I2C or SPI):

PCM1862/63/64/65

• Support for Up To Four Digital Microphones

(SW-Controlled Devices)

• Programmable Gain Amplifier (PGA):

– Fixed Gain: 0 dB, 12 dB, 32 dB

(PCM1860/61)

– SW-Controlled Gain: –12 dB to +32 dB

(PCM1862/63/64/65)

• Integrated High-Performance Audio PLL

• Single 3.3-V Power-Supply Operation

• Power Dissipation at 3.3 V:

– < 85 mW (PCM1860/61/62/63)

– < 145 mW (PCM1864/65)

• Energysense Audio Content Detector for Auto

System Wakeup and Sleep

• Master or Slave Audio Interface

• Automatic PGA Clipping Suppression Control

• PCB-Footprint Compatibility Across All Devices

2 Applications

• Home Theater and TV

• Voice Controlled Devices

• Bluetooth® Speaker

• Microphone Array Processors

3 Description

The PCM186x family (PCM1860, PCM1861,

PCM1862, PCM1863, PCM1864, and PCM1865) of

audio front-end devices take a new approach to

audio-function integration to ease compliance with

European Ecodesign legislation, while enabling highperformance

end products at reduced cost. The

PCM186x support single-supply operation at 3.3 V,

and offer an integrated programable gain amplifier

(PGA) in a small package; this configuration makes it

feasible to implement smaller and smarter products at

a reduced cost.

The PCM186x audio front end supports single-ended

input levels from small-mV microphone inputs to 2.1-

VRMS line inputs, without external resistor dividers.

The front-end mixer (MIX), multiplexer (MUX), and

PGA also support differential (Diff), pseudodifferential,

and single-ended (SE) inputs, making

these devices an ideal interface for products that

require interference suppression. The PCM186x

integrate many system-level functions that assist or

replace some DSP functions.

An integrated band-gap voltage reference provides

excellent PSRR, so that a dedicated analog 3.3-V rail

may not be required.