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Today’s in-vehicle infotainment systems (IVI) are no longer just simple “radio + player”; they have evolved into the core of intelligent cockpits that integrate high-definition music playback, voice interaction, navigation announcements, and multi-screen interaction. Users’ pursuit of audio quality has shifted from “audible” to “pleasant and faithful,” and the demand for system stability has also increased alongside driving safety requirements.
TAC5412-Q1Pin diagram (Image source: Chip specifications)The performance of the codec, as a key component in the automotive audio chain, directly determines the clarity of voice interaction, the immersion of audio and video playback, and the stability of operation in extreme environments.
TI (Texas Instruments) has launched the automotive-grade stereo audio codec TAC5412-Q1👈, which, with its 120dB DAC and 112dB ADC dynamic range, automotive-grade reliability, and flexible adaptability, has become the preferred solution for automotive audio design.Today, we will take a deep dive into this chip and see how it addresses multiple pain points in automotive audio.
TAC5412-Q1 die text image (Image source: IPBrain platform)The die size of TAC5412-Q1 is 2.88 mm x 2.88 mm (excluding scribe lanes), with 1 layer of polycrystalline and 5 layers of metal, and the die text is TAC5212B0.
TAC5412-Q1 has excellent dynamic range and low distortion characteristics. The dynamic range of the DAC in this audio codec reaches up to 120dB, with a differential output THD+N as low as -102dB, and a single-ended headphone output dynamic range of 111dB, accurately reproducing audio details and reducing noise interference.The ADC dynamic range reaches 112dB, with a differential input THD+N of -99dB, and the SNR can be improved to 114dB in channel summation mode, ensuring clarity in voice capture and audio input.
DAC signal chain processing flowchart (Image source: Chip specifications)
ADC signal chain processing flowchart (Image source: Chip specifications)TAC5412-Q1 supports an ultra-wide sampling rate from 4kHz to 768kHz. The audio interface of this audio codec is compatible with I²S, TDM, and left-justified (LJ) formats, and the control interface supports I²C and SPI dual modes, with word lengths adaptable to 16, 20, 24, or 32 bits.This device supports microphone input and line input on the ADC channel and provides AC and DC coupling configuration options. The DAC output can be configured for line output or headphone load.
Top-level overview diagram (Image source:IPBrainplatform)TAC5412-Q1 can operate with a single 3.3V power supply. It also provides integrated high-voltage, programmable microphone bias (3~10V) and input diagnostic circuits, allowing direct connection to microphone-based automotive systems, providing complete direct-coupling input fault diagnosis functionality.TAC5412-Q1 features a low-power operating mode that can switch operating states according to different automotive scenarios, aligning with the energy-saving design requirements of the entire vehicle and reducing unnecessary power consumption.
TAC5412-Q1 Functional block diagram (Image source: Chip specifications)TAC5412-Q1 integrates programmable channel gain, digital volume control, low-jitter phase-locked loop (PLL), programmable high-pass filter (HPF), programmable EQ, and dual second-order filters, with low-latency and ultra-low-latency filter modes for interpolation and decimation filters.TAC5412-Q1 has passed the AEC-Q100 automotive-grade standard certification, supporting a wide operating temperature range from -40℃ to 125℃. Whether in the high temperatures of summer or the severe cold of winter, it ensures stable audio codec functionality, avoiding stuttering and distortion issues.
Key Block Diagram
02. Key Module Diagram
DAC (Poly layer) (Image source: IPBrain platform)
Detail Diagram
03. Device Detail Diagram
MOSFET (Image source: IPBrain platform)
Resistor (Image source: IPBrain platform)
Application Scenario
04. Application Scenarios
In-vehicle audio host: The ultra-wide sampling rate of TAC5412-Q1 can perfectly adapt to lossless audio formats, and the 120dB DAC dynamic range can accurately reproduce audio details; at the same time, its PLL clock configuration, which is resistant to electromagnetic interference, can cope with the complex circuit environment around the in-vehicle host.In-vehicle partitioned audio and personalized entertainment devices: TAC5412-Q1 can flexibly interface with various modules in a multi-screen entertainment architecture through compatibility with multiple audio interfaces such as I²S and TDM; it achieves partitioned transmission of audio signals through 2 analog inputs and multiple analog outputs, allowing the driver to listen to navigation, the passenger to listen to music, and the rear seats to watch videos without interference.In addition, TAC5412-Q1 can also be applied in scenarios such as in-vehicle auxiliary audio terminals, emergency call (eCall), remote information processing control units, and active noise cancellation in vehicles.
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