This A/D conversion board transforms the analog current input by 3 quartz flexible accelerometer and 3 PT1000 input temperature signals into digital signals and outputs data in RS422 communication. (This board is 1Hz broadcast sending in default mode)
Part No, :
AD-KOrder(MOQ) :
1Product Series and Parameters
| Sn# | project | unit | metric | test condition |
| 1 | input range | mA | option | this board range is -50mA~+50mA,and corresponding accelerometer range is -40g~+40g |
| 2 | Zero temperature coefficient |
nA/℃ | ≯2 | Test the data set per ℃ every 5 degrees from-40℃ to + 85℃ Test 100S, calculate the temperature coefficient of each segment, and connect the input end to 0 signal. The temperature box is stable and then insulated for 1h for testing. |
| 3 | Scale factor temperature coefficient | ppm/℃ | ≯3 | From-40℃ to + 85℃, a set of data is tested every 5 degrees, each set is tested 100S, the temperature coefficient of each segment is calculated, and the input terminal is connected to ± 1 mA DC current signal. After temperature stabilization Reinsulation for 1h for testing. |
| 4 | Zero stability | nA | ≯2 | The input end was connected to the 0mA signal, and then the output of the AD conversion board was collected for a total of 8h, after which the standard variance was calculated |
| 5 | scale factor stability | ppm | ≯3 | The input is connected to ± 1 mA signals, and then collect the AD conversion board Of the output, collect for a total of 8h, and then calculate its standard variance |
| 6 | start time | s | ≯20 | It enters a stable state 5s after starting 20S |
| 7 | degree of linearity | ppm | ≯10 | Test through the current in the input range |
Production process
Product dimension
Application Scenarios
FAQ
The high-precision AD conversion circuit is used to convert the current signal output by the accelerometer into a digital signal. It is mainly The functions include: 1. Synchronization signal receiving function: Receiving differential synchronization signal input and latching AD values to achieve synchronous acquisition and synchronous communication; 2. Serial protocol communication function: Triggered by a synchronization signal, it periodically sends current acquisition values using the standard RS422 protocol. 3. Internal and external synchronous switching and upload frequency adjustment function: It can be adjusted to internal synchronous upload or external synchronous upload of the acquisition circuit through commands, and the upload frequency can be modified through commands.
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