VSLC

TPS8804

PLDO

AMUX

AGND

SLC_RX

VCC

VINT

VMCU

MCUSEL

MCU

ADC

GPIO

I

2

C

GPIO

LEDEN

GPIO

SCL

SDA

CSEL

MCU_TX1

MCU_RX

VIN

PGND DGND

SLC_TX1

CSA

DINA

PDO

PDN

PDP

PREF

COO

Photo

Chamber

Pre-Regulator

5V to 15V

VLINE

REF0P3

COP

CON

CO

Sensor

VLINE

LEDLDO

DINB

CSB

Blue

IR

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

TPS8804

SLVSF29 – OCTOBER 2019

TPS8804 Smoke Alarm AFE

1

1 Features

1

•

Photo Chamber AFE

–

Dual 8-bit programmable current LED drivers

–

Temperature compensation of LED current

–

Ultra-low offset trans-impedance amplifier for

photodiodes

–

Programmable and bypassable gain stage

•

Carbon Monoxide Sensor AFE

–

Ultra-low offset gain stage

–

Programmable gain and reference

•

Power Management

–

Low quiescent current LDO for internal supply

–

Programmable LDO for external

microcontroller

•

SLC interface transmitter and receiver

•

Ultra-low power consumption

•

•

Configurable fault monitor with pin interrupt signal

•

Wide input voltage range

2 Applications

•

Smoke and CO detector

3 Description

The TPS8804 is a smoke detection ASIC specialized

for commercial smoke detectors. The TPS8804

integrates all of the amplifiers and drivers required for

a dual-wave photoelectric smoke detection and

carbon monoxide detection system. Its high flexibility

is ideal for smoke detection systems where precision

and power consumption are critical.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS8804

TSSOP (38)

9.7 mm x 4.4 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Application