1 Features

• Multichannel high-performance ADC:

– 2-channel analog microphones or line-in

– 4-channel digital PDM microphones

– Up to 2 analog and up to 2 digital microphone

channels

• ADC line and microphone differential input

performance:

– Dynamic range (DR): 104dB

– THD+N: –95dB

• ADC channel summing mode, DR performance:

– 107dB, 2-channel summing

• ADC input voltage:

– Differential, 2VRMS full-scale inputs

– Single-ended, 1VRMS full-scale inputs

• ADC sample rate (fS) = 8kHz to 768kHz

• Programmable channel settings:

– Channel gain: 0dB to 42dB, 0.5dB 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)

• Voice activity detection (VAD)

• I2C control interface

• 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-AVDD supply:

– 9.5mW/channel at 48kHz sample rate

2 Applications

• Smart speakers

• IP network cameras

• Professional microphones and wireless systems

• Video conference systems

3 Description

The TAA3020 is a high-performance, audio analog-todigital

converter (ADC) that supports simultaneous

sampling of up to two analog channels or four

digital channels for a pulse density modulation

(PDM) microphone input. The device supports line

and microphone inputs and allows single-ended and

differential input configurations. The device allows

for sample rates up to 768kHz and integrates

programmable channel gain, digital volume control,

a programmable microphone bias voltage, a phaselocked

loop (PLL), a programmable high-pass filter

(HPF), biquad filters, and low-latency filter modes.

The device supports time-division multiplexing (TDM),

I2S, or left-justified (LJ) audio formats, and can be

controlled with the I2C interface. These integrated

high-performance features and the ability to be

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

the device an excellent choice for space-constrained

audio systems in far-field microphone recording

applications.

The TAA3020 is specified from –40°C to +105°C, and

is offered in a 20-pin WQFN package.