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Rongde Weiye helped fight the "epidemic" by supplying materials for forehead guns and blood oximeter

Issuing time:2020-04-28 12:08Author:alma

Portable finger clip oximeter

What is an oximeter:

The main measurement indicators of the oximeter are pulse rate, blood oxygen saturation, and perfusion index (PI). Blood oxygen saturation (oxygen saturation abbreviated as SpO2) is one of the important basic data in clinical medicine. Oxygen saturation refers to the percentage of the combined O2 volume in the total blood volume to the total O2 volume that can be combined.

market outlook:

Applicable people: People with vascular diseases (coronary heart disease, high blood pressure, hyperlipidemia, cerebral thrombosis...); How many elderly people increase in my country each year?

Portable finger clip oximeter:

The working principle of the finger clip oximeter is based on the hemoglobin in the blood having different absorption capacity for red light and infrared light. Compared with reduced hemoglobin (Hb), oxyhemoglobin (HbO2) absorbs more red light and less infrared rays. . In contrast, HbO2 absorbs less red light and more infrared light. The red and infrared LED lights are close to each other in structure, which makes it easy to transmit light at a single location on the finger. The light penetrates from one side of the finger to the other, and after being received by the photodiode, a corresponding voltage is generated.

便携式指夹血氧仪框架图

便携式指夹血氧仪主要元器件

红外测温仪主要包括元器件：

1. MCU (opportunity related agent line: Huada, Apex)

2. Light reflector (measuring infrared light and red light passing through body parts)

3. Analog switch (opportunity related agent line: 3PEAK)

4. LDO device (opportunity related agent line: 3PEAK)

5. Operational amplifier (opportunity related agent line: 3PEAK)

便携式指夹血氧仪（相关产线推广型号）

便携式指夹血氧仪推广器件

3PEAK zero-drift, low-noise operational amplifier (TP1564) features:

◆ Power supply voltage: 2.5V to 6.0V

◆ Low power supply current: 600μA per channel

◆ Rail-to-rail input and output

◆ Bandwidth: 6 MHz

◆ Slew rate: 4.5V /μs

◆ Offset voltage: maximum ±3mV

◆ Offset voltage temperature drift: 1μV/℃

◆ Low noise: 19nV/√Hz at 1kHz

◆ High output capacity: 100mA

◆ Operating temperature range from -40℃ to 125℃

◆ Green, popular packaging

* TP156XAL1-2: SOP-8

* TP156XAL1-4: SOP-14

3PEAK single-pole double-throw analog switch (TPW3221) features:

◆Wide input voltage range: 1.65V~5.5V;

◆On-resistance value: 1.15Ω maximum;

◆Continuous output current: 800mA;

◆Bandwidth: 100MHz;

◆Quiet current: 0.3uA (typical value);

◆Package: 10-Pin MSOP, 10-Pin DFN;

Features of 3PEAK analog switches (TPW4051, TPW4052, TPW4054):

◆Analog switch voltage: 3.3V, 5 V, 10V, ±5V

◆Low on-resistance:

When Vs = ±4.5 V or 9V, the typical value is 50Ω

Typical value is 60Ω at Vs = 4.5 V

Typical value is 300Ω at Vs = 3 V

◆Bandwidth: 2 00 MHz

◆Fast switching time: tON = 60 ns, tOFF = 50 ns

◆Break before make

◆Working temperature range: -40°C to 125°C

3PEAK low-power LDO (TPL710, TPL720) features:

◆Input voltage range: TPL710 series 2.4V-7V; TPL720 series 2.4V-6V

◆Output voltage range: 1.0V, 1.2V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 3.6V

◆Maximum output current: TPL710 series 200mA; TPL720 series 400mA

◆1uA ultra-low quiescent current

◆Package: SOT23-3, SOT23-5, SOT-89, 1×1 DFN-4

3PEAK general LDO (TPL730) features:

◆Input voltage: 2.4V-5.5V

◆Output voltage: 1.2V, 1.5V, 1.8V, 2.5V, 2.7V, 2.8V, 2.9V, 3.0V, 3.3V

◆1% output voltage accuracy at room temperature

◆Maximum output current: TPL730 series 300mA; TPL740 series 500mA

◆Low quiescent current and shutdown current

◆Package: SOT23-5, SC70-5, SOT-89, 1×1 DFN-4

华大低功耗MCU

（HC32L13x/HC32L17x/HC32L19x/）特点：

◆48MHz Cortex-M0+ 32 bit;

◆Wide input voltage range: 1.8V~5.5V;

◆Ultra-low power consumption:

◆0.5μA @ 3V deep sleep mode:

◆All clocks are off, power-on reset is valid, IO status is maintained, IO interrupt is valid, power consumption when all registers, RAM and CPU data are saved

◆0.9μA @3V deep sleep mode + RTC work;

◆7μA @32.768kHz low-speed working mode: MCU and peripherals run, run the program from FLASH;

◆35μA/MHz@3V@24MHz sleep mode: MCU stops, peripherals are running, and the main clock is running;

◆130μA/MHz@3V@24MHz working mode: MCU and peripherals run, run the program from FLASH;

◆4μS ultra-low power consumption wake-up time;

◆4*26 / 6*24 / 8*22 LCD driver;

◆Hardware perpetual calendar RTC module;

◆3 way voltage comparator

◆12-bit 1Msps sampling high-speed and high-precision SARADC;

◆Working conditions: -40 ~ 85℃;

Apex MCU (APM32F103xxxx) features:

◆APM32 adopts the latest version of M3 core and has an FPU coprocessor, which can efficiently process complex floating-point operations;

◆The main frequency of APM32 is up to 96MHZ;

◆Power supply range 1.6V~3.6V;

◆APM32 power consumption:

Operating power consumption is about 30% lower than STM32;

Sleep power consumption is about 10% lower than STM32;

Standby power consumption is about 23%~50% lower than STM32;

◆APM32 FLASH 1KB page erase time is about 90% faster;

◆APM32 Flash 16bit programming time is about 65% faster;

◆APM32 USB and CAN can be used at the same time;

◆APM32 QSPI interface supports external flash expansion;

◆APM32 has a 96-bit non-rewritable unique identification, which guarantees the security of information and data in all aspects;

◆APM32 has good portability and can greatly reduce the workload of engineers (software/hardware is fully compatible, providing absolute advantage price)