1 Features

• AEC-Q100 qualified for automotive applications

– Temperature grade 1: –40°C ≤ TA ≤ +125°C

• Stereo audio ADC channel

– Performance:

• Line/Microphone differential input dynamic

range: 104dB

• Differential input THD+N: –97dB

• Channel summing mode supports high

SNR: 107dB

– Input voltage:

• Differential, 10VRMS full-scale inputs

• Single-ended, 5VRMS full-scale inputs

– ADC sample rate (fS) = 4kHz to 768kHz

– Programmable microphone bias (3V to 10V):

• With an integrated efficient boost converter,

or

• With external high voltage HVDD supply

– Programmable microphone input fault

diagnostics:

• Open inputs or shorted inputs

• Short to ground, MICBIAS or VBAT

• Microphone bias over current protection

• Stereo audio DAC channel

– Performance:

• DAC to differential line-out dynamic range:

114dB

• DAC to single-ended headphone-out

dynamic range: 107dB

• Differential output THD+N: –96dB

– Line-out/Headphone output voltage:

• Differential, 2VRMS full-scale

• Single-ended, 1VRMS full-scale

– DAC sample rate (fs) = 4kHz to 768kHz

• Common Features

– Low-latency and Ultra low-latency decimation/

interpolation filter options

– Programmable HPF and biquad digital filters

– I2C or SPI control interface

– Audio Serial Interface

• Format: TDM, I2S or Left-justified (LJ)

• Word Length: 16, 20, 24 or 32 Bits

– Programmable PLL for flexible clocking

– Low Power Modes

– Single supply operation AVDD: 3.3V

– I/O supply operation: 1.2V or 1.8V or 3.3V

2 Applications

• Emergency Call (eCall)

• Telematics Control Unit

• Automotive Active Noise Cancellation

• Automotive Head Units

3 Description

The TAC5312-Q1 is a low-power stereo audio codec

with 10VRMS differential input, 104dB ADC and 2VRMS

differential output, 114dB DAC. The TAC5312-Q1

supports both differential and single-ended inputs and

outputs. The device supports both microphone and

line inputs on the ADC channels with options for AC

and DC coupling configurations. The DAC outputs

can be configured for either line-out or headphone

loads. TAC5312-Q1 can drive up to 62.5mW into

a 16Ω headphone load. The device also offers an

integrated high-voltage, programmable microphone

bias and input diagnostic circuitry that allows direct

connection to microphone-based automotive systems

with complete fault diagnostic capability for directcoupled

inputs. The TAC5312-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 TAC5312-Q1 integrates a

programmable channel gain, digital volume control, a

low-jitter phase-locked loop (PLL), a programmable

high-pass filter (HPF), programmable EQ and biquad

filters, and interpolation and decimation filters with

low and ultra-low latency filter modes. The device

allows for sample rates up to 768kHz. The TAC5312-

Q1 supports time-division multiplexing (TDM), I2S, or

left-justified (LJ) audio formats and can be controlled

with I2C or SPI. These integrated high-performance

features, along with a single, 3.3V supply operation,

make TAC5312-Q1 an excellent choice for spaceconstrained

automotive systems.