1 Features
• Multichannel high-performance ADC:
– 4-channel analog microphones or line-in,
– 8-channel digital PDM microphones, or
– Combination of analog and digital microphones
• ADC line and microphone differential input
performance:
– Dynamic range (DR): 104dB
– THD+N: –95dB
• ADC channel summing mode, DR performance:
– 107dB, 2-channel summing
– 110dB, 4-channel summing
• ADC input voltage:
– Differential, 2VRMS full-scale inputs
– Single-ended, 1VRMS full-scale inputs
• ADC sample rate (fS) = 8kHz to 192kHz
• Programmable channel settings:
– Channel gain: 0 dB to 42dB, 1dB steps
– Digital volume control: –100dB to 27dB
– Gain calibration with 0.1dB resolution
– Phase calibration with 163ns resolution
• Programmable microphone bias or supply voltage
generation
• Low-latency signal processing filter selection
• Programmable HPF and biquad digital filters
• Automatic gain controller (AGC)
• 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
– Master or slave interface
• Single-supply operation: 3.3V or 1.8V
• I/O-supply operation: 3.3V or 1.8V
• Power consumption for 1.8-V AVDD supply:
– 8.5mW/channel at 16kHz sample rate
– 9.2mW/channel at 48kHz sample rate

2 Applications
• Smart speakers
• IP network cameras
• Professional microphones and wireless systems
• Video conference systems

3 Description
The TAA3040 is a Burr-Brown™ high-performance,
audio analog-to-digital converter (ADC) that supports
simultaneous sampling of up to four analog
channelsor eight digital channels for the pulse density
modulation (PDM) microphone input. The device
supports line and microphone inputs and allows
single-ended and differential input configurations. The
device integrates programable channel gain, digital
volume control, a programmable microphone bias
voltage, a phase-locked loop (PLL), a programmable
high-pass filter (HPF), biquad filters, low-latency filter
modes, and allows for sample rates up to 768kHz ,
and allows for sample rates up to 192kHz. 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. These
integrated high-performance features and the ability
to be powered from a single supply of 3.3V or
1.8V make the device an excellent choice for spaceconstrained
audio systems in far-field microphone
recording applications.
The TAA3040 is specified from –40°C to +105°C and
is offered in a 24-pin WQFN package.