1 Features

? AEC-Q100 qualified for automotive applications:

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

? Triple general-purpose inputs

? PWM output using sawtooth or triangular

waveform

? 10-bit GPI-to-voltage output

– 1 LSB DNL

? Automatically detected I2C and SPI

– 1.62-V VIH with VDD = 5.5 V

? MODE pin to select between programming and

standalone modes

? User-programmable nonvolatile memory (NVM)

? Internal, external, and VDD reference

? Option for PWM-frequency-error correction

? Wide operating range

– Power supply: 1.8 V to 5.5 V

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

2 Applications

? Rear light

? Condition monitoring module

? Wired control

3 Description

The DAC539G2-Q1 is an application-specific, lookup

table (LUT) based GPI-to-PWM converter. This

device has a 10-bit GPI-to-voltage output converter

and a voltage-to-PWM converter. Both these circuits

can be externally connected to create a GPI-to-PWM

converter. Three GPIs are mapped to eight 10-bit

digital codes that represent the voltage output. There

is a programmable delay at the GPIs for eliminating

glitches on these inputs. The look-up table values are

programmed using I2C or SPI and stored in the NVM.

The GPIs are multiplexed with the I2C and SPI. The

voltage-to-PWM converter uses a comparator with

one input as a programmable sawtooth or triangle

waveform and the other input as an external voltage

input.

This device automatically detects I2C and SPI and

has an internal reference. The DAC539G2-Q1 is an

excellent choice for fault communication in automotive

stop and turn lights and similar industrial applications.