0
ACTIVE
Resolution (Bits) |
10 |
Number of DAC channels |
2 |
Interface type |
I2C, SPI |
Output type |
Buffered Voltage |
Output voltage range (V) |
0 to 5.5 |
INL (max) (±LSB) |
1 |
Settling time (µs) |
20 |
Reference type |
Ext, Int |
Architecture |
String |
Rating |
Automotive |
Features |
(x1) PWM, EEPROM, Integrated ADC, Smart DAC |
Sample/update rate (Msps) |
0.025 |
Power consumption (typ) (mW) |
0.4 |
Operating temperature range (°C) |
-40 to 125 |
Product type |
Smart DAC |
WQFN (RTE)-16-9 mm² 3 x 3
The 10-bit AFE53902-Q1 and 8-bit AFE43902-Q1 devices ( AFEx3902-Q1) are dual-channel, smart analog front ends (AFE) targeted for multislope thermal foldback of LED lighting. The output of LED lights reduce with an increase in temperature. Multislope thermal foldback helps maintain a steady light output from LEDs, irrespective of temperature change, while limiting the LED temperature to programmed thresholds.
The AFEx3902-Q1 have an ADC for temperature input and a DAC or PWM generator as an output. These devices have an integrated state machine that is preprogrammed as a multislope thermal foldback controller. The AFEx3902-Q1 are an excellent choice for thermal foldback of automotive rear lights and headlights, as well as horticulture lights. The AFEx3902-Q1 work independently from the parameters programed into the NVM, and thus enable these smart AFEs for processor-less applications and design reuse. These devices also automatically detect I 2C or SPI, and have an internal reference.
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