BH1790GLC-E2 ROHM

Datasheet Sensor for Heart Rate Monitor ICs Optical Sensor for Heart Rate Monitor IC BH1790GLC General Description Key Specifications BH1790GLC is optical sensor for heart rate monitor IC in VCC1 Voltage Range: 2.5V to 3.6V which LED driver and green light detection photo-diode VCC2 Voltage Range: 1.7V to 3.6V are incorporated. This device drives LED and provides Current Consumption: 200A(Typ) the intensity of light reflected from body. Standby Mode Current: 0.8A(Typ) LED brightness can be adjusted by LED driver current Operating Temperature Range: -20C to +85C and light emitting period. The photodiode having the high sensitivity for green light, excellent wavelength selectivity and excellent lrcut characteristics achieves accurate pulse wave detection. Features Package W(Typ) x D(Typ) x H(Max) Green filter with excellent wavelength selectivity. WLGA010V28 2.80mm x 2.80mm x 1.00mm Built-in Ircut Filter. LED driver with current selection. 2 Correspond to 1.8V I C Interface. Applications Wearable device, smart phone, Tablet PC. WLGA010V28 Typical Application Circuit VCC1 VCC2 TEST2 LED1 LED Driver LED LED2 control LED Driver SCL Micro ADC Controller 2 ADC I C SDA control POR OSC TEST3 GND TEST1 Product structure : Silicon monolithic integrated circuit. This product has no designed protection against radioactive rays. This product does not include laser transmitter. This product does not include optical load. This product includes Photo detector, ( Photo Diode ) inside of it www.rohm.com TSZ02201-0M3M0F616010-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/22 TSZ22111 14 001 1.Feb 2017 Rev.004 IRCUT GREENBH1790GLC Contents General Description ........................................................................................................................................................................ 1 Features.......................................................................................................................................................................................... 1 Applications .................................................................................................................................................................................... 1 Key Specifications ........................................................................................................................................................................... 1 Package .......................................................................................................................................................................................... 1 Typical Application Circuit ............................................................................................................................................................... 1 Contents ......................................................................................................................................................................................... 2 Pin Configuration ............................................................................................................................................................................ 3 Pin Description ................................................................................................................................................................................ 3 Block Diagram ................................................................................................................................................................................ 4 Description of Blocks ...................................................................................................................................................................... 4 Absolute Maximum Ratings ............................................................................................................................................................ 5 Thermal Resistance ........................................................................................................................................................................ 5 Recommended Operating Conditions ............................................................................................................................................. 6 Electrical Characteristics................................................................................................................................................................. 6 2 I C Bus Timing Characteristics ....................................................................................................................................................... 7 Typical Performance Curves ........................................................................................................................................................... 8 Figure 1. Sensitivity Ratio vs Wavelength ................................................................................................................................... 8 Figure 2. Sensor out vs Temperature .......................................................................................................................................... 8 Figure 3. Ratio vs Angle .............................................................................................................................................................. 8 Figure 4. Ratio vs Angle .............................................................................................................................................................. 8 Measurement Sequence ................................................................................................................................................................. 8 Register Map ................................................................................................................................................................................ 11 Power Supply Sequence............................................................................................................................................................... 14 2 I C Bus Communication ................................................................................................................................................................ 15 Application Example ..................................................................................................................................................................... 16 I/O equivalent circuit ..................................................................................................................................................................... 17 Operational Notes ......................................................................................................................................................................... 18 Ordering information ..................................................................................................................................................................... 20 Marking Diagram .......................................................................................................................................................................... 20 Optical design for the device ......................................................................................................................................................... 20 Physical Dimension, Tape and Reel Information ........................................................................................................................... 21 Revision History ............................................................................................................................................................................ 22 www.rohm.com TSZ02201-0M3M0F616010-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/22 TSZ22111 15 001 1.Feb 2017 Rev.004