Program Overview ：

When an object is placed on the scale , Pressure is applied to the pressure sensor , The sensor is deformed , This changes the impedance , Then the signal is output to MCU The microcontroller controls , MCU The microcontroller can be based on LED The commands and programs input by the controller are adjusted accordingly, and the results are output to the display , Voice prompt , And print out relevant documents , Users can connect from other Internet Devices （ For example, laptop or smartphone ） Do data Interaction .

Hot spots in the industry ：

Electronic weighing technology has developed from static weighing to dynamic weighing ： The measurement method has developed from analog measurement to digital measurement . With the arrival of the era of intelligence , Domestic electronic scales have been realized for four consecutive years 20% Annual growth rate above , Far exceeding the global average growth rate . Because the signal voltage output by the sensor in the electronic scale is too small （ Basically, they are in the range of millivolt or microvolt ）, You can't Satisfy AI D The requirements of the converter for the input signal level , therefore , The amplifier circuit is used to bring enough gain to improve the signal amplitude . in addition , The analog signal output by the load cell is weak , Therefore, it can be directly sent to... Only after being amplified by an amplifier AI D Converter for AI D transformation .

Core devices ：

As shown in the above figure, Shanghai Xianji LTC85 94XT1 4 It's a four channel amplifier , LTC8 594 Provide input offset voltage for very low output to correct low offset and drift , Use patents quickly Stability technology of jump response chopper .

1. High dc accuracy ： soil 40 µ V ( Maximum ） VOS, Drift to soil 50 nV/°C ( Maximum ）.

2. l V Step down 0. 1% Settlement time of ： 1. 2 µ s .

3. The overload recovery time is 0. 1%: 35 µ s.

4. Every amplifier 125 µ A Micro power , 1. 8 V to 5. 5 V Wide power supply voltage range .

Of Kunyuan microelectronics TS2434A It's a low noise 、 Low voltage 、 Low power operational amplifier TS21 34A A series of operations The rated temperature range of the amplifier is 40°C to +125°C, When the temperature range is reduced , Products can also be in 2. 5V to 5. 5V Working under extended power supply .

1. Low offset voltage ： lmV ( Typical values ）.

2. High gain ： 105dB ( Typical values ）.

3. Rail to rail input / output .

4. Low bias current ： 5pA (TYP) .

For others, see the specification on the product details page

Shanghai Xianji LTC8594XT1 4 And Kunyuan microelectronics TS2434A These two amplifiers have their own advantages , Are suitable for

Thousands of electronic scales and other fields .

Recommend products for intelligent electronic scales

Intelligent electronic scale source ： Use the core box

Note: The information on this document is subject to change without notice.