Smartwatch

Products and reference designs

Smartwatch

Block diagram

Overview

Our integrated circuits and reference designs help you create small, reliable and efficient smartwatch systems that track user health and activity, run native apps, communicate to other devices, process voice commands via the internet, play music and tell time.

Design requirements

Modern smartwatch designs require:

  • Compact battery management with ultra-low standby for longer battery run time.
  • Multiparameter biosensing to monitor user health and physical activity.
  • Vivid, high-resolution OLED display with capacitive touch and haptic feedback.

Block diagram

Find products and reference designs for your system.

Smartwatch

Audio input/output Audio input/output Audio CODEC AudioCODEC Class D amplifier Class Damplifier Microphone Microphone Non-isolated DC/DC power supply Non-isolated DC/DC power supply LDO LDO Buck converter Buckconverter Buck-boost converter Buck-boostconverter Boost converter Boost converter Load switch Loadswitch Output user interface Output user interface LCD bias LCDbias LED backlight LEDbacklight LCD display LCD display Haptics driver Hapticsdriver AMOLED display AMOLED display AMOLED bias AMOLEDbias Battery charging Battery charging Battery Battery Battery charger Batterycharger Battery guage Batteryguage Wireless charging receiver Wireless chargingreceiver USB current limited switch USB current limited switch Charging port Charging port Wireless interface Wireless interface Antenna Antenna Bluetooth BLE BluetoothBLE GPS module GPSmodule LTE module LTEmodule NFC NFC Digital processing Digital processing Applications processor Applicationsprocessor Sensing Sensing Cap touch & gesture sensing MCU Cap touch & gesturesensing MCU Motion sensing MEMS Motion sensingMEMS Proximity sensing Proximitysensing Heart rate / PPG sensing Heart rate / PPG sensing ECG sensing ECGsensing Temperature sensing Temperature sensing Ambient light sensor Ambient light sensor Pressure sensing Pressuresensing Hall sensor Hall sensor Inductive sensor Inductive sensor Memory Memory RAM RAM Flash Flash

Technical documentation

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Type Title Date
More literature Adapting Qi-compliant wireless-power solutions to low-power wearable products 30 Apr 2014
Application note Low-Power Pedometer Using an MSP430 MCU 28 May 2013
Technical article No strings attached: Creating next-generation wireless patient monitors PDF | HTML 26 Jun 2023
Technical article With capacitive touch, liquid is no longer kryptonite to keypads PDF | HTML 25 Aug 2023
Technical article The future of wearable biosensors and linear chargers PDF | HTML 13 Jun 2023
White paper Designing and evaluating an NFC-enabled bio-patch 13 Jan 2015
Technical article Optical heart-rate sensors for biometric wearables PDF | HTML 12 Sep 2023
Application note Haptic Implementation Considerations for Mobile and Wearable Devices (Rev. A) PDF | HTML 11 May 2022
Product overview Haptic Solutions for Wearable Devices (Rev. A) 10 Oct 2014
Application note Haptic Energy Consumption (Rev. A) PDF | HTML 10 May 2022
Product overview Battery Management Solutions for Wearable and Fitness Devices (Rev. C) 09 Sep 2014
White paper Bio-patch Solutions for health and fitness (Rev. A) 09 Dec 2014
Application note DRV2605 Device Setup Guide 08 Jul 2014
Application note Improved Fast Charge Using the bq25120 Adjustible VBATREG, Charge Current, TS, 08 Aug 2016
Technical article Three reasons to add a voltage supervisor to your next wearable power design PDF | HTML 05 Jul 2023
Application note How to Design an SpO2 and OHRM System Using AFE4403 03 Mar 2015
Analog Design Journal Battery-charging considerations for low-power applications 02 May 2016
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 02 Jul 2019

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