1 Features
• 4-channel PDM microphones simultaneous
conversion
• PDM input to TDM or I2S output converter
performance:
– 127-dB dynamic range (DR) with highperformance,
5th-order PDM input
– 117-dB dynamic range (DR) with highperformance,
4th-order PDM input
• Channel summing mode, DR performance with
high-performance, 4th-order PDM input:
– 120-dB, 2-channel summing
• Programmable PDM clock output:
– 768 kHz to 6.144 MHz
• Programmable output sample rate (fS):
– 8 kHz to 768 kHz
• Programmable channel settings:
– Digital volume control: –100 dB to 27 dB
– Gain calibration: 0.1-dB resolution
– Phase calibration: 163-ns resolution
• Microphone bias or supply voltage generation
• Voice activity detection (VAD)
• Low-latency signal processing filter selection
• Programmable HPF and biquad digital filters
• I2C control
• 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
– Master or slave interface
• Single-supply operation: 3.3 V or 1.8 V
• I/O-supply operation: 3.3 V or 1.8 V
• Power consumption for 1.8-V supply:
– 2.8mW/channel at 16-kHz sample rate
– 3.6 mW/channel at 48-kHz sample rate

2 Applications
• Automotive Active Noise Cancellation
• Automotive Head Unit
• Rear Seat Entertainment
• Digital Cockpit Processing Unit
• Telematics Control Unit

3 Description
The PCMD3140-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 four
digital channels for the PDM microphone input.
The device integrates programable 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 768 kHz. The device
supports time-division multiplexing (TDM), I2S, or leftjustified
(LJ) audio formats, and can be controlled
with the I2C interface. Additionally, the PCMD3140-
Q1 supports master and slave mode selection for
the audio bus interface operation. These integrated
high-performance features, along with the ability to
be powered from a single-supply of 3.3 V or 1.8
V, make the device an excellent choice for spaceconstrained
audio systems in far-field microphone
recording applications.
The PCMD3140-Q1 is specified from –40°C to
+125°C, and is offered in a 20-pin WQFN package.