1 Features

? AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

? Pulse-width modulation (PWM) output on digital

pins (218 Hz to 48.8 kHz)

? Logarithmic dimming

? LED fade-in fade-out with GPIO control

? Sequential turn indicator animation

? Programmable comparators and DACs configured

as GPIO

? Automatically detects I2C or SPI

– 1.62-V VIH with VDD = 5.5 V

? VREF/MODE pin to select between programming

and standalone modes

? User-programmable nonvolatile memory (NVM)

? Internal, external or power supply as reference

? Wide operating range

– Power supply: 1.8 V to 5.5 V

– Temperature range: –40?C to +125?C

? Tiny package: 16-pin WQFN (3 mm × 3 mm)

2 Applications

? Rear light

? Small light

? Interior light

3 Description

The DAC43901-Q1 and DAC43902-Q1 (DAC4390x-

Q1) are a family of automotive, 8-bit smart

DACs with dual and quad PWM outputs. The

DAC43901-Q1 provides two PWM outputs, and the

DAC43902-Q1 provides four PWM outputs. The

DAC channels also act as trigger inputs or outputs.

The DAC4390x-Q1 provides a preconfigured state

machine that logic generates logarithmic dimming with

configurable timings. The PWM-based logarithmic

dimming is applicable in logarithmic fade-in and fadeout

applications in automotive interior and exterior

lighting. The DAC4390x-Q1 also support sequential

animation applicable for automotive turn-indicator

lights. These devices provide NVM for storing the

configurations. These smart DACs function without

the need for a processor (processor-less operation)

using GPIOs and NVM.

These devices automatically detect I2C or SPI and

have an internal reference. The feature set combined

with the tiny package and low power make the

smart DACs an excellent choice for applications in

automotive light animation.