1 Features
1• Multichannel high-performance ADC:
– 4-channel analog microphones or line-in
• ADC line and microphone differential input
performance:
– Dynamic range:
– 123-dB, dynamic range enhancer enabled
– 113-dB, dynamic range enhancer disabled
– THD+N: –98 dB
• ADC differential 2-VRMS full-scale input
• 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:
– Master or slave interface selection
– 32-bits, 4-channel TDM
– 32-bits, 2-channel TDM
– 32-bits, 2-channel I2S
– 32-bits, 2-channel left-justified (LJ)
• Automatic power-down upon loss of audio clocks
• Integrated high-performance audio PLL
• Low-noise MICBIAS 2.75-V output
• 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:
– 17.0 mW/channel at 16-kHz sample rate
– 18.4 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 PCM1840 is a high-performance, Burr-Brown™
audio analog-to-digital converter (ADC) that supports
simultaneous sampling of up to four analog channels.
The device supports differential line and microphone
inputs with 2-VRMS full-scale signal. The device
integrates microphone bias voltage, a phase-locked
loop (PLL), a DC removal high-pass filter (HPF), and
supports sample rates up to 192 kHz. The device
supports time-division multiplexing (TDM), I2S, or leftjustified
(LJ) audio formats, selectable with the
hardware pin level. Additionally, the PCM1840
supports master and slave mode selection for the
audio bus interface operation. These integrated highperformance
features, along with the ability to be
powered from a single supply of 3.3 V, make the
device an excellent choice for cost-sensitive, spaceconstrained
audio systems in far-field microphone
recording applications.
The PCM1840 is specified from –40°C to +125°C,
and is offered in a 24-pin WQFN package.