Renesas OB1203SD-BT-EVK Manual

OB1203SD-BT-EVK
Integrated Context Engine for Heart Rate and Blood Oxygen Saturation measurement with BLE
The Integrated Context Engine (ICE) for Biosensing
(see Figure 2) includes:
■
Renesas OB1203 reflective photoplethysmography
(PPG), proximity (PS) and light / color (LS/CS)
sensor
■
Telink's TLSR8258F512 micro controller with
Bluetooth Low Energy (BLE) radio
■
LiPo's LP201030 rechargeable Li ion battery, 3.7
V, 40mAh, 10 30
× ×
[1] Light and color sensing function not used in this application.
The ICE hardware performs reflective, non-invasive
measurements (e.g., at the fingertip), transmits the data
via BLE to a smartphone or tablet (see Figure 1), where
the Heart Rate (HR) and blood oxygen saturation
(SpO ) are determined by an Android app. During this
2
process the proximity sensor function keeps the
measurement running as long as there is a finger
present.
TLSR8258
Controller

Figure 1. Block Diagram of ICE

OB1203 Sensor Features
■
Highly reliable and industry-proven OSIP package
with integrated cover glass for hypoallergenic
products
■
Integrated and factory trimmed LED source, driver,
and photodetector
■
PPG (Heart Rate and Blood Oxygen Concentration):
●
Aesthetic industrial design options with unique
far-red LED allowing SpO
behind visibly dark, IR-transmissive ink.
●
16 to 18 bits output resolution
●
High speed sampling up to 3200 samples per
second for highest resolution and improved
SNR
●
On-chip averaging and FIFO data storage
enable convenient asynchronous access to data
X0008647 Rev.1.2
Feb.8.21
3
2 mm .
measurements
2
■
Proximity Sensor:
●
Up to 16 bits resolution
●
Ambient light suppression
[1]
●
Analog and digital crosstalk cancelation
■
Wide operation temperature range: -40°C to +85°C
■
Wide supply voltage range:
●
1.7V to 3.6V for digital / analog
●
3.3 V to 5.0 V for LEDs
■ 2
I C interface capable of 100kHz or 400kHz
communication
■
Programmable level-based interrupt functions
■
Industry's smallest package: 4.2 × 2 × 1.2 mm
14-pin module
Radio Mode Features
■
Telink TLSR8258F512
●
BT 4.2 BLE 2.4GHz radio
●
32-bit MCU at 48MHz, 512 kB flash, 32kB SRAM
●
Wide supply voltage range: 1.9V to 3.6V
■
Compact size: 32-pin, 5.0 × 5.0 × 0.75 mm package
ICE Characteristics
■
PCB (see
●
Operation temperature range: -40°C to +85°C
●
PCB supply voltage range: 3.3 V to 6.5V
●
PCB: 40mm × 11mm (21mm with program pads) ×
5mm with USB charge connector (3.1mm without)
●
Program pad PCB section removable
■
Battery life:
●
150 × 30s measurements
●
Typical PCB quiescence current: 0.5 µA at 4V
●
Battery capacity: 40mAh if charged up to 4.2V
●
Battery operation: 3.3V to 4.2V
●
Rechargeable via USB Micro cable
●
> 70% shelf: 1 year stored (-20°C to 30°C)
■
Battery operating temperature range -20C° to + 60°C
Applications
■
Mobile devices: Wearables, Fitness, and Accessories
■
Industrial: Worker Safety, Driver Assist
Evaluation Kit Manual
Figure 2
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