1 Features

? 8-channel PDM microphones simultaneous

conversion

? PDM input to TDM or I2S output converter

performance:

– 127dB dynamic range (DR) with high

performance 5th order PDM input

– 117dB dynamic range (DR) with high

performance 4th order PDM input

? Channel summing mode, DR performance with

high performance 4th order PDM input:

– 120dB, 2-channel summing

– 123dB, 4-channel summing

? Programmable PDM clock output:

– 768kHz to 6.144MHz

? Programmable output sample rate (fS):

– 8kHz to 768kHz

? Programmable channel settings:

– Digital volume control: –100dB to 27dB

– Gain calibration with 0.1dB resolution

– Phase calibration with 163ns resolution

? Microphone bias or supply voltage generation

? Low-latency signal processing filter selection

? Programmable HPF and biquad digital filters

? I2C or SPI controls

? Integrated high-performance audio PLL

? Automatic clock divider setting configurations

? Audio serial data interface:

– Format: TDM, I2S, or left-justified (LJ)

– Word length: 16 bits, 20 bits, 24 bits, or 32 bits

– Controller or target interface

? Single-supply operation: 3.3V or 1.8V

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

? Power consumption for 1.8V supply:

– 2.9mW/channel at 16kHz sample rate

– 2.5mW/channel at 48kHz sample rate

2 Applications

? Video doorbell

? Smart speakers

? Building security gateway

? IP network cameras

? GPS personal navigation device

? Video conference systems

3 Description

The PCMD3180-Q1 is a high-performance, pulsedensity-

modulation (PDM) input to time-division

multiplexing (TDM) or I2S output converter that

supports simultaneous sampling of up to eight digital

channels for the PDM microphone input. The device

integrates programmable digital volume control, a

microphone bias voltage, a phase-locked loop (PLL),

a programmable high-pass filter (HPF), biquad filters,

low-latency filter modes, and allows for output sample

rates up to 768kHz. The device supports time-division

multiplexing (TDM), I2S, or left-justified (LJ) audio

formats, and can be controlled with either the I2C

or SPI interface. Additionally, the PCMD3180-Q1

supports controller and target mode selection for the

audio bus interface operation. These integrated highperformance

features, along with the ability to be

powered from a single-supply of 3.3V or 1.8V, make

the device an excellent choice for space-constrained

audio systems in far-field microphone recording

applications.

The PCMD3180-Q1 is specified from –40°C to 125°C

and is offered in a 24-pin WQFN package.