SI1144-AAGX-GM Silicon Labs

Si1144-AAGX Data Short 2 Optical Heart Rate Sensor Module with I C Inter- KEY FEATURES face and HR Measurement Software Fully integrated heart rate sensor with ARM code library for The Si1144-AAGX is a low-power, reflectance-based, heart rate extracting HR from the optical sensor data sensor. This optical heart rate sensor module includes an analog- Green LED with lens to-digital converter, integrated high-sensitivity photodiodes, host High-sensitivity photodiode communications processor, a green high efficiency LED, and Low-noise analog-to-digital converter and filtering three integrated LED drivers with ninety selectable drive levels. LED drivers The Si1144-AAGX offers excellent performance under a wide dy- Optical blocking namic range and a variety of light sources from 525 nm to 940 Host communications and interrupts nm. The Si1144-AAGX devices are provided in a 10-lead 4.9 x 2.85 x 1.2 mm LGA module package and are capable of opera- Optional Movement compensation uses external accelerometer data tion from 1.71 to 3.6 V over the 40 to +85 C temperature range. Accurate sensing of weak blood flow signals on the wrist Three independent regulated LED drivers Scalable from cost-sensitive single LED systems to high Applications: performance three LED systems Fitness Bands Programmable from 6 mA to 360 mA each Smart Watches Integrated green LED ideal for wrist based heart rate applications Other Wearables Add up to 2 external LEDs Healthcare Broad spectral sensitivity supports green through 940 nm LEDs No additional optical blocking required Low power consumption Sensor Die 1.71 to 3.6 V supply voltage VDD LED1 Regulator LEDA 25.6 s LED on time keeps total power consumption duty cycle LED1 low without compromising performance or noise immunity LED Temp A Drivers Filter LED3 ADC LED3 < 500 nA standby current M LED2 U LED2 Visible Internal and external wake support X Built-in voltage supply monitor and power-on reset controller Digital Sequencer & Control Logic Infrared 2 I C serial communications INT SCL Registers Oscillator Up to 3.4 Mbps data rate 2 I C GND SDA Slave mode hardware address decoding (0x5A) 10-lead 4.9 X 2.85 x 1.2 mm LGA Module package Temperature Range Si1144-AAGX Sensor Module Block Diagram 40 to +85 C silabs.com Smart. Connected. Energy-friendly. Rev. 0.9 Not Recommended for New DesignsSi1144-AAGX Data Short Si1144-AAGX Information 1. Si1144-AAGX Information Si1144-AAGX 4.9 x 2.85 x 1.3 mm LGA Module Application Schematic Table 1.1. Recommended Operating Conditions Parameter Symbol Test Condition Min Typ Max Unit V Supply Voltage V 1.71 3.6 V DD DD V OFF Supply Voltage V OFF mode 0.3 1.0 V DD DD OFF 1 V = 3.3 V V Supply Ripple Voltage DD DD 50 mVpp 1 kHz10 MHz Operating Temperature T 40 25 85 C 2 SCL, SDA, Input High Logic Voltage V x 0.7 V V I C DD DD VIH 2 SCL, SDA Input Low Logic 0 V x 0.3 V I C DD VIL Voltage LED Emission Wavelength l 525 nm LED Supply Voltage VLED 4.1 5.0 V 1 030 kHz LED Supply Ripple Voltage 250 mVpp 30 kHz100 MHz 100 mVpp Start-Up Time V above 1.71 V 25 ms DD LED3 Voltage Start-up V x 0.7 V DD 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 Si1144-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 Not Recommended for New Designs