Analog Front End for residential smoke alarm
Product details
Parameters
Package | Pins | Size
Features
- 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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Description
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.
Technical documentation
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 | Get Connected: A new blog series | Jan. 10, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
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 (...)
Software development
Design tools & simulation
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HTSSOP (DCP) | 38 | View options |
Ordering & quality
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- Ongoing reliability monitoring
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