PCM1809中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

1 Features

? Stereo low power ADC:

– 2-channel analog microphones or line-in

? ADC line and microphone differential and singleended

input performance:

– PCM1809 dynamic range:

? Differential Input: 104dB

? Single-ended Input: 102dB

– THD+N: –95 dB

? 2-VRMS differential full-scale input

? Direct Coupling

– Wide Input Common Mode support

– AC/DC Coupling support

? ADC sample rate (fS) = 8 kHz to 192 kHz

? Hardware pin control configurations

? Linear-phase or low-latency filter selection

? Flexible audio serial data interface:

– Controller or target interface selection

– 32-bits, 2-channel TDM

– 32-bits, 2-channel I2S

? Automatic power-down upon loss of audio clocks

? Integrated high-performance audio PLL

? Single-supply operation: 3.3 V

? I/O-supply operation: 3.3 V or 1.8 V

? Power consumption for 3.3-V AVDD supply:

– 19.6 mW/channel at 16-kHz sample rate

– 21.3 mW/channel at 48-kHz sample rate

2 Applications

? Smart Speakers

? DVD recorders and players

? AV receivers

? Video conference systems

? IP network cameras

3 Description

The PCM1809 is a low power audio analog-to-digital

converter (ADC) that supports simultaneous sampling

of up to two analog channels. The device supports

single-ended and differential line and microphone

inputs with a 2VRMS full-scale differential signal.

The device integrates a phase-locked loop (PLL),

a DC removal high-pass filter (HPF), and supports

sample rates up to 192kHz. The device supports

time-division multiplexing (TDM) or I2S audio formats,

selectable with the hardware pin level. Additionally,

the PCM1809 supports Controller and target mode

selection for the audio bus interface operation. These

integrated features, along with the ability to be

powered from a single supply of 3.3V, make the

device an excellent choice for cost-sensitive, spaceconstrained

audio systems in microphone recording

applications.

The PCM1809 is specified from –40°C to +105°C, and

is offered in a 20-pin WQFN package.