DAC43902RTERQ1

Digital To Analog Converters Overview

The DAC43902RTERQ1 is an automotive-grade, 8-bit smart digital-to-analog converter featuring four pulse-width modulation (PWM) outputs. It operates on a supply voltage ranging from 1.7 V to 5.5 V and supports an ambient temperature range of –40°C to +125°C. The device integrates a programmable state machine for logarithmic dimming and sequential animation, alongside user-programmable nonvolatile memory (NVM). Communication interfaces include I2C and SPI with automatic detection capabilities. The component is housed in a compact 16-pin WQFN package measuring 3 mm × 3 mm.

Digital To Analog Converters Feature Summary

• Integrated programmable state machine supporting logarithmic fade-in/fade-out and sequential turn indicator animations without processor intervention.
• Four multiplexed digital pins function as PWM outputs or serial communication lines depending on the selected operational mode.
• Supports autonomous standalone operation via GPIO control and NVM storage, eliminating the need for continuous host controller interaction.
• Features automatic interface detection between I2C and SPI protocols to simplify system integration.

Digital To Analog Converters Applications

• Automotive rear lighting systems
• Interior vehicle illumination controls
• Sequential turn indicator animation circuits

Digital To Analog Converters Procurement Notes

Verify that the specific ordering suffix matches the required package variant and tape-and-reel specifications. Confirm AEC-Q100 qualification status aligns with target automotive reliability standards. Ensure the design accommodates the 16-pin WQFN thermal pad connection requirements for proper heat dissipation during operation.

Digital To Analog Converters Selection Notes

Select this model when four independent PWM channels are required for automotive lighting applications. Consider the DAC43901-Q1 if only two PWM outputs are sufficient for the design. Evaluate the internal reference accuracy against external reference requirements for precise threshold settings. Verify that the 8-bit resolution meets the dimming granularity needs of the application.

Digital To Analog Converters Part Context

This component belongs to the DAC4390x-Q1 family of automotive smart DACs designed specifically for lighting control. The family includes the DAC43901-Q1 with two PWM outputs and the DAC43902-Q1 with four. These devices share identical architectural features, including the smart state machine and interface options, differing primarily in channel count.

Digital To Analog Converters Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Texas Instruments for current alternative recommendations based on specific pinout and functional compatibility requirements.

Digital To Analog Converters FAQ

How does the device switch between programming and standalone modes?

The VREF/MODE pin determines the operational mode. Pulling this pin low enables I2C or SPI programming mode, while pulling it high enables standalone mode where the device executes configurations stored in nonvolatile memory.

What is the purpose of the TRIG-IN and TRIG-OUT pins?

TRIG-IN serves as a trigger input for initiating fade-in/fade-out sequences or animations. TRIG-OUT acts as a trigger output, allowing multiple devices to be cascaded for synchronized multi-channel lighting effects.

Can the DAC43902-Q1 operate without a microcontroller?

Yes, the device supports processor-less operation. Once configured via I2C or SPI and saved to nonvolatile memory, it can autonomously execute preprogrammed animations and dimming profiles using only GPIO inputs.