TPS8802DCPR

The Texas Instruments TPS8802DCPR is a versatile Analog Front End (AFE) specifically designed for dual-wave photoelectric smoke alarms and carbon monoxide (CO) detection systems. It integrates essential regulators, amplifiers, and drivers, making it ideal for applications where precision and low power consumption are critical.

Key electrical specifications include 2 input channels, an I2C interface for communication, and a wide operating temperature range from -40°C to 85°C. The device supports a supply voltage range from 2V to 15.6V and has a low current consumption of 100 µA.

Features include dual 8-bit programmable current LED drivers with temperature compensation, an ultra-low offset op-amp for photodiodes, and a programmable gain stage. For CO detection, it offers an ultra-low offset gain stage. The integrated horn driver supports self-resonant drivers for three-terminal piezos and PWM for voice on two-terminal piezos. Power management features include a programmable LDO for external microcontrollers and a boost converter for the horn and interconnect.

The TPS8802DCPR is available in a 38-HTSSOP package, suitable for surface mount applications. Its design supports 10-year battery life operation and seamless battery backup functionality, ensuring continuous power during mains supply drops or battery disconnections.