Door & window sensor

Non-isolated DC/DC power supply

Door and window sensors are often powered from a coin cell battery. As a result, long battery life is a key design consideration. Buck converters with high light-load efficiency may be considered for designs prioritizing maximum battery life. For designs operating from a low voltage battery, boost converters may be used instead. Linear regulators (LDOs) are a good option for simple designs. LDOs also enable added functionalities including EMI filtering.

Products

Multi-channel ICs (PMICs)

LP87702-Q1—Dual buck converter and 5-V boost with diagnostic functions

Linear & low-dropout (LDO) regulators

TPS7A20—300-mA ultra-low-noise low-IQ low-dropout (LDO) linear regulator with high PSRR

TPS7B81—150-mA, off-battery (40-V), ultra-low-IQ, low-dropout (LDO) voltage regulator with enable

TPS737—1-A, ultra-low-dropout voltage regulator with reverse current protection & enable

TPS74901—3-A, low-VIN (0.8-V) adjustable ultra-low-dropout voltage regulator with power good and enable

TLV702—300-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable

TLV703—300-mA, high-PSRR, low-IQ, low-dropout voltage regulator

Buck converters (integrated switch)

TPS62840—60-nA quiescent current (IQ), 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter

TPS62843—1.8-V to 5.5-V input, 600-mA ultra-low IQ step-down converter

TPS62822—2.4-V to 5.5-V input, 2-A step-down converter with 1% accuracy in 1.5-mm x 2-mm VSON-HR package

TPS562203—4.2-V to 17-V input, 2-A synchronous buck converter in SOT563 with eco-mode

Boost converters (integrated switch)

TPS61299—95-nA low IQ 5.5-V boost converter with input current limit and fast transient performance

TPS61098—Low input voltage, 4.3-V output voltage, synchronous boost converter with integrated LDO

P-channel MOSFETs

CSD23280F3—-12-V, P channel NexFET™ power MOSFET, single LGA 0.6 mm x 0.7 mm, 116 mOhm, gate ESD protection

CSD23381F4—-12-V, P channel NexFET™ power MOSFET, single LGA 0.6 mm x 1 mm, 175 mOhm, gate ESD protection

Powered devices

TPS23753A—IEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through

Shunt voltage references

LM4040—Fixed voltage, 45-µA, precision micropower shunt voltage reference

Load switches

TPS22901—3.6-V, 0.5-A, 78-mΩ, 22-nA leakage load switch

Supervisor & reset ICs

TPS3839—Ultra-low power, supply voltage supervisor

Analog switches & muxes

TS5A23157—5-V, 2:1 (SPDT), 2-channel analog switch

TS5A3159A—1-Ω, 5-V, 2:1 (SPDT), 1-channel general-purpose analog switch with powered-off protection

Energy storage

Door and window sensors may harvest energy from a window or light source. An ultra low power harvester power management IC can be used to charge a super capacitor or rechargeable battery using a solar cell.

Products

Battery fuel gauges

BQ27621-G1—System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge

Battery charger ICs

BQ21061—500-mA 1-cell linear charger with 10-nA ship mode, power-path, regulated system voltage and LDO

BQ24050—1-cell, 1-A, Li-ion linear battery charger with automatic AC/USB detection

Sensor analog front end

Reed switches and Hall effect sensors are two technologies used to detect the presence or absence of a magnet embedded in a door or window frame. Reed switches use a physical switch that closes in the presence of a magnetic field and opens when the field is removed. On the other hand, Hall effect sensors detect the magnetic field using no moving parts. Inductance-to-digital converters do not use magnets at all which makes them immune to tampering magnets.

Products

Hall-effect latches & switches

DRV5032—Low power (5 Hz, <1µA), low voltage (up to 5.5V) switch

TMAG5231—Low-power, low-voltage (1.65 V to 5.5 V) Hall-effect switch

Comparators

TLV7032—Dual nanopower comparator with push-pull output

General-purpose op amps

TLV9042—Dual, 5.5-V, 350-kHz, Ultra-low 1.2-V, low quiescent current (10-μA) op amp

LM358B—Dual, 36-V, 1.2-MHz, 3-mV offset voltage operational amplifier with -40°C to 85°C operation

TLV9061—Single, 5.5-V, 10-MHz, RRIO operational amplifier for cost-optimized applications

Noninverting buffers & drivers

SN74AUP2G17—2-ch, 0.8-V to 3.6-V low power buffers with Schmitt-Trigger inputs

SN74LVC1G07—Single 1.65-V to 5.5-V buffer with open-drain outputs

SN74LVC1G126—Single 1.65-V to 5.5-V buffer with 3-state outputs

SN74AUP1G17—Single 0.8-V to 3.6-V low power buffer with Schmitt-Trigger inputs

Digital processing

A microcontroller monitors the sensor in the system and communicates status information to a central location. The design may use a dedicated microcontroller or a single system-on-chip solution which combines the microcontroller and radio on a single device.

Products

Arm Cortex-M0+ MCUs

MSPM0G3507—80MHz Arm M0+ MCU, 128KB Flash, 32KB SRAM, 2×12bit 4Msps ADC, DAC, 3×COMP, 3×op-amp, CAN-FD, MATHACL

MSP430 microcontrollers

MSP430G2553—16 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer

MSP430F1612—8 MHz MCU with 55KB Flash, 5KB SRAM, 12-bit ADC, Dual 12-bit DAC, comparator, DMA, I2C/SPI/UART

MSP430F5438A—25-MHz MCU with 256-KB flash, 16-KB SRAM, 12-bit ADC, DMA, UART/SPI/I2C, timer, HW multiplier

MSP430G2452—16 MHz MCU with 8KB Flash, 256B SRAM, 10-bit ADC, comparator, timer, SPI/I2C

Arm-based processors

AM3358—Sitara processor: Arm Cortex-A8, 3D graphics, PRU-ICSS, CAN

Arm Cortex-M4 MCUs

TM4C1294NCPDT—32-bit Arm Cortex-M4F based MCU with 120-MHZ, 1-MB flash, 256-KB RAM, USB, ENET MAC+PHY

Sub-1 GHz wireless MCUs

CC1354R10—SimpleLink™ Arm® Cortex®-M33 multiband wireless MCU with 1-MB flash and up to 296-KB SRAM

CC1354P10—SimpleLink™ Arm® Cortex®-M33 multiband wireless MCU with 1MB flash, 296KB SRAM, integrated power amp

CC1311R3—SimpleLink™ Arm® Cortex®-M4 Sub-1 GHz wireless MCU with 352-kB flash

CC1352P—SimpleLink™ Arm Cortex-M4F multiprotocol Sub-1 GHz & 2.4 GHz wireless MCU integrated power amplifier

Sub-1 GHz transceivers

CC1120—High performance Sub-1 GHz wireless transceiver for narrowband systems

CC1125—Ultra-high performance Sub-1 GHz wireless transceiver for narrowband systems

CC1101—Low-power Sub-1 GHz wireless transceiver

CC110L—Value line Sub-1 GHz wireless transceiver

Low-power 2.4-GHz products

CC2651R3—SimpleLink™ 32-bit Arm® Cortex®-M4 single-protocol 2.4-GHz wireless MCU with 352-kB flash

CC2640—SimpleLink™ 32-bit Arm Cortex-M3 Bluetooth® Low Energy wireless MCU with 128kB Flash

CC2640R2F—SimpleLink™ 32-bit Arm® Cortex®-M3 Bluetooth® 5.1 Low Energy wireless MCU with 128-kB flash

CC2520—Second generation 2.4 GHz ZigBee/IEEE 802.15.4 wireless transceiver

CC2642R—SimpleLink™ 32-bit Arm Cortex-M4F Bluetooth® Low Energy wireless MCU with 352kB Flash

CC2630—SimpleLink™ 32-bit Arm Cortex-M3 Zigbee and 6LoWPAN wireless MCU with 128kB Flash

Direction-controlled voltage translators

SN74AXC4T245—4-bit dual-supply bus transceiver

Real-time clocks (RTCs) & timers

TPL5111—Ultra low power system timer (35 nA) for power gating in duty cycled applications

Wireless interface

The wireless interface in the design allows status information to be transmitted to a central location. A system-on-chip solution, which integrates a microcontroller and radio, allows designs to run the application layer and wireless protocol stack on one chip. A microcontroller with dedicated RF radio topology allows designs to separate the wireless protocol stack from the application layer.

Products

Arm Cortex-M0+ MCUs

MSPM0G3507—80MHz Arm M0+ MCU, 128KB Flash, 32KB SRAM, 2×12bit 4Msps ADC, DAC, 3×COMP, 3×op-amp, CAN-FD, MATHACL

Arm Cortex-M4 MCUs

TM4C1294NCPDT—32-bit Arm Cortex-M4F based MCU with 120-MHZ, 1-MB flash, 256-KB RAM, USB, ENET MAC+PHY

Sub-1 GHz wireless MCUs

CC1354R10—SimpleLink™ Arm® Cortex®-M33 multiband wireless MCU with 1-MB flash and up to 296-KB SRAM

CC1354P10—SimpleLink™ Arm® Cortex®-M33 multiband wireless MCU with 1MB flash, 296KB SRAM, integrated power amp

CC1311R3—SimpleLink™ Arm® Cortex®-M4 Sub-1 GHz wireless MCU with 352-kB flash

CC1352P—SimpleLink™ Arm Cortex-M4F multiprotocol Sub-1 GHz & 2.4 GHz wireless MCU integrated power amplifier

Sub-1 GHz transceivers

CC1120—High performance Sub-1 GHz wireless transceiver for narrowband systems

CC1125—Ultra-high performance Sub-1 GHz wireless transceiver for narrowband systems

CC1101—Low-power Sub-1 GHz wireless transceiver

CC110L—Value line Sub-1 GHz wireless transceiver

Low-power 2.4-GHz products

CC2651R3—SimpleLink™ 32-bit Arm® Cortex®-M4 single-protocol 2.4-GHz wireless MCU with 352-kB flash

CC2640—SimpleLink™ 32-bit Arm Cortex-M3 Bluetooth® Low Energy wireless MCU with 128kB Flash

CC2640R2F—SimpleLink™ 32-bit Arm® Cortex®-M3 Bluetooth® 5.1 Low Energy wireless MCU with 128-kB flash

CC2520—Second generation 2.4 GHz ZigBee/IEEE 802.15.4 wireless transceiver

Other wireless products

CC2592—2.4 GHz range extender with up to +22 dBm output power

CC2500—Low Cost, Low-Power 2.4 GHz RF Transceiver Designed for Low-Power Wireless Apps in the 2.4 GHz ISM B

CC2530-RF4CE—Zigbee, IEEE 802.15.4 and RF4CE wireless MCU with 256kB Flash and 8kB RAM

CC2531-RF4CE—Zigbee, IEEE 802.15.4 and RF4CE wireless MCU with up to 256kB Flash and 8kB RAM

CC2620—SimpleLink™ 32-bit Arm Cortex-M3 Zigbee® RF4CE wireless MCU with 128kB Flash