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.