Photo Chamber AFE
- Dual 8-bit programmable current LED drivers
- Temperature compensation of LED current
- Ultra-low offset op-amp for photodiodes
- Programmable and bypassable gain stage
Carbon Monoxide Sensor AFE
- Ultra-low offset gain stage
- Programmable gain and reference
Horn Driver
- Self-resonant driver for three-terminal piezos
- PWM support for voice on two-terminal piezos
Power Management
- Programmable LDO for external microcontroller
- Boost converter for horn, interconnect
Interconnection bus for multi-alarm communication
Ultra-low power consumption
I²C serial interface
Programmable battery test load

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The TPS8802 is a smoke alarm ASIC specialized for residential smoke alarms. The TPS8802 integrates all of the regulators, amplifiers, and drivers required for a dual-wave photoelectric smoke alarm and carbon monoxide (CO) detection system. Its high flexibility is ideal for smoke alarm systems where precision and power consumption are critical.

The wide input voltage range combined with low standby power consumption and power-saving features support 10-year battery life operation from a single lithium primary battery. The TPS8802 also supports battery backup smoke alarms, seamlessly remaining powered when the mains supply drops or if the battery is disconnected.

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Technical documentation

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	Type	Title	Date
*	Datasheet	TPS8802 Smoke Alarm AFE datasheet (Rev. A)	Mar. 19, 2020
	User guide	Using the TPS8802EVM (Rev. A)	May 20, 2020
	Technical articles	SigCon Architect: The keys to your high-speed design	Oct. 27, 2015
	Technical articles	Make signal conditioning easy with WEBENCH® Interface Designer	Jan. 27, 2015
	Technical articles	Get Connected: Equalization	Oct. 15, 2014
	Technical articles	One part for all: Multi-standard signal conditioners	Mar. 07, 2014

Design & development

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Hardware development

EVALUATION BOARD Download

Evaluation module for TPS8802 residential photoelectric smoke/CO alarm

TPS8802EVM

149

Description

The TPS8802EVM is used to evaluate the TPS8802 smoke and CO detection analog front end and power management IC. The EVM allows for easy connection from the TPS8802 to a user-supplied photoelectric chamber and carbon monoxide sensor. The TPS8802 GUI interfaces with the EVM to quickly evaluate the (...)

Features

Two programmable, temperature compensated LED drivers for dual-wave photoelectric chambers
Ultra-low offset photodiode transimpedance amplifier with programmable gain stage
Ultra-low power op-amp for electrochemical carbon monoxide sensors
Interconnect/SLC interface for multi-detector communication
Wide (...)

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