TIADC081S021
Overview
The ADC081S021 is a low-power, 8-bit analog-to-digital converter featuring a high-speed serial interface capable of throughput rates between 50 ksps and 200 ksps. It operates on a single supply voltage ranging from 2.7V to 5.25V and utilizes a SAR architecture where the sample-and-hold function is integrated into the device. The serial interface is compatible with multiple standards including SPI, QSPI, and MICROWIRE, making it highly versatile for various digital controller platforms.
Why Choose This Part
This ADC offers variable power management where power consumption scales directly with the sampling speed, dropping to just 2.6 uA in shutdown mode. Its wide supply range and 5V-tolerant I/O simplify integration into mixed-voltage systems without requiring level shifters. The SOT-23-6 package provides a significant space advantage for dense PCB layouts compared to traditional SOIC alternatives.
Applications
Getting Started
Integration requires a stable reference voltage, as the device uses the supply voltage VA as its reference. Engineers should use high-frequency decoupling capacitors (0.1 uF and 1 uF) placed close to the VA pin to ensure 8-bit accuracy. For software development, the device follows a standard SPI protocol where data is clocked out on the falling edge of SCLK, compatible with most MCU SPI peripherals set to Mode 3.
