Automotive stereo audio ADC with 112dB dynamic range, high-voltage input, mic bias and diagnostics

The TAA5412-Q1 is a

2-channel high-performance, audio analog-to-digital converter (ADC) that supports

analog input signals up to 10VRMS with 112dB dynamic range. The TAA5412-Q1 supports line and microphone inputs, and allows

for both single-ended and differential input configurations with options for AC and

DC coupling. This device offers an integrated high-voltage, programmable microphone

bias, and input diagnostic circuitry that allows direct connection to

microphone-based automotive systems with full fault diagnostic capability for

direct-coupled inputs. The TAA5412-Q1 integrates an

efficient boost converter to generate a high voltage microphone bias using an

external, low-voltage, 3.3V supply. The device can also directly use an external

high-voltage supply (HVDD), which is any readily available supply in the system to

generate this microphone bias. The TAA5412-Q1 integrates

the programable channel gain, digital volume control, a low-jitter phase-locked loop

(PLL), a programmable high-pass filter (HPF), biquad filters, decimation filters

with low and ultra-low latency filter modes, and allows for sample rates up to

768kHz. The TAA5412-Q1 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, along with a single, 3.3V supply operation, make the TAA5412-Q1 device an excellent choice for scalable,

space-constrained automotive systems.