JAJSLP3 june 2023 AFE43902-Q1 , AFE53902-Q1
PRODUCTION DATA
The 10-bit AFE53902-Q1 and the 8-bit AFE43902-Q1 devices (AFEx3902-Q1) are dual-channel smart analog front ends (AFE) with buffered voltage-output DAC, PWM, and ADC. The SDA/SCLK pin is repurposed as the PWM output when the VREF/MODE pin is held high.
The AFEx3902-Q1 provide a preprogrammed state machine that functions as a multislope thermal foldback controller. These devices contain nonvolatile memory (NVM), an internal reference and automatically detect I2C and SPI. The devices support Hi-Z power-down modes by default, which can be configured to 10 kΩ-AGND or 100 kΩ-AGND using the NVM. The AFEx3902-Q1 have a power-on-reset (POR) circuit that makes sure all the registers start with default or user-programmed settings using NVM. The AFEx3902-Q1 operate with either an internal reference, external reference, or with power supply as the reference, and provide a full-scale output of 1.8 V to 5.5 V.
The AFEx3902-Q1 support I2C standard mode (100Kbps), fast mode (400Kbps), and fast mode plus (1Mbps). The I2C interface can be configured with four device addresses using the A0 pin. The SPI mode supports a three-wire interface by default, with up to a 25-MHz SCLK input. The NC/SDO pin can be configured as SDO in the NVM for SPI read capability. The AFEx3902-Q1 are designed for thermal foldback of LED lighting in automotive rear lights and headlights, horticulture lighting, and other lighting applications. The state machine and NVM enable processor-less operation. As a result of the smart feature set, the AFEx3902-Q1 is called a smart AFE.