Overview

MCUs in the 78K0R/Lx3, the R8C/Lx and the RL78/L1x Series from Renesas Electronics integrate the on-chip A/D and D/A converters required in pulse oximeters, as well as an LCD drive-control circuit. These on-chip features reduce the number of external components required, making the MCUs ideal choices for pulse oximeter products that must combine compact size and low cost.

Pulse Oximeter

System Block Diagram

System Block Diagram

Recommended Products
Block Semiconductor Device Recommended Product Name Features, etc.
Main controller MCU 78K0/Lx3 On-chip LCD driver, low power consumption
R8C/L36x Group
RL78/L1x Series
Sensor Analog front end Smart Analog IC101 16-bit delta-sigma A/D converter + Built-in PGIA
Smart Analog IC300 Low voltage configurable amplifier
Configurable amplifier: 3 channels
Operating voltage: 2.2 to 3.6 V (low-voltage product)
Smart Analog IC500 Configurable amplifier
Configurable amplifier: 3 channels
Operating voltage: 3.0 to 5.5 V