SI1143-AAGX-GMR

Optical Heart Rate Sensor Module with I2C Interface KEY FEATURES fo r m en de d Regulator Temp Visible LED1 A M U X ADC D • LED drivers • Optical blocking • Host communications and interrupts LED Drivers LED3 LEDA LED1 LED3 LED2 ec Oscillator N ot R Si1143-AAGX Sensor Module Block Diagram silabs.com | Smart. Connected. Energy-friendly. • Three independent regulated LED drivers • Scalable from cost-sensitive single LED systems to high performance three LED systems • Integrated green LED ideal for wrist based heart rate applications • Add up to 2 external LEDs Digital Sequencer & Control Logic Registers I2C Filter LED2 om Infrared SCL • Low-noise analog-to-digital converter and filtering • Programmable from 6 mA to 360 mA each Si1143 Optical Heart Rate Sensor SDA • High-sensitivity photodiode • Accurate sensing of weak blood flow signals on the wrist Applications: • Fitness Bands • Smart Watches • Other Wearables • Healthcare INT • Fully integrated heart rate module IC • Green LED with lens N ew The Si1143-AAGX is a low-power, reflectance-based, heart rate sensor module with integrated 525 nm green LED, two additional LED driver outputs, I2C digital interface, and programmable-event interrupt output. This optical heart rate sensor module includes an analogto-digital converter, integrated high-sensitivity photodiodes, host communications processor, and three integrated LED drivers with fifteen selectable drive levels. The Si1143-AAGX offers excellent performance under a wide dynamic range and a variety of light sources from 525 nm to 940 nm. The Si1143-AAGX devices are provided in a 10- lead 4.9x2.85x1.2 mm QFN package and are capable of operation from 1.71 to 3.6 V over the –40 to +85 °C temperature range. VDD es ig ns Si1143-AAGX Data Short GND • Broad spectral sensitivity supports green through 940 nm LEDs • No additional optical blocking required • Low power consumption • 1.71 to 3.6 V supply voltage • 25.6 µs LED “on” time keeps total power consumption duty cycle low without compromising performance or noise immunity • < 500 nA standby current • Internal and external wake support • Built-in voltage supply monitor and power-on reset controller • I2C serial communications • Up to 3.4 Mbps data rate • Slave mode hardware address decoding (0x5A) • 10-lead 4.9x2.85x1.2 mm LGA Module • Temperature Range • –40 to +85 °C Rev. 0.9 Si1143-AAGX Data Short Si1143-AAGX Information D es ig ns 1. Si1143-AAGX Information N ew Si1143-AAGX Module Application Schematic with up to 3 LEDs and Separate LED Power Supply Table 1.1. Recommended Operating Conditions Parameter Symbol VDD VDD OFF Supply Voltage VDD_OFF fo r VDD Supply Voltage Test Condition Min Typ Max Unit 1.71 — 3.6 V 1.0 V 50 mVpp OFF mode –0.3 VDD = 3.3 V — — T –40 25 85 °C SCL, SDA, Input High Logic Voltage I2CVIH VDD x 0.7 — VDD V SCL, SDA Input Low Logic I2CVIL 0 — VDD x 0.3 V l — 525 — nm VLED 4.1 — 5.0 V — — 250 mVpp — — 100 mVpp VDD above 1.71 V 25 — — ms Start-up VDD x 0.77 — — V VDD Supply Ripple Voltage1 Operating Temperature Voltage LED Emission Wavelength om LED Supply Voltage m en de d 1 kHz – 10 MHz ec LED Supply Ripple Voltage1 R Start-Up Time LED3 Voltage 0–30 kHz 30 kHz – 100 MHz N ot Note: 1. Supply voltage ripple sensitivity depends on the voltage at the LEDx pins when turned on. Table 1.2. Ordering Guide Part Number Package LED Drivers Si1143-AAGX-GMR 4.9 x 2.85 x 1.2 mm LGA Module 3 LED drivers, 1 green LED integrated silabs.com | Smart. Connected. Energy-friendly. Rev. 0.9 | 1 es ig ns D N ew fo r om Products m en de d Smart. Connected. Energy-Friendly www.silabs.com/products Quality Support and Community www.silabs.com/quality community.silabs.com N ot R ec Disclaimer Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. 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