(1) The module interface of our shop is clear and the performance is stable. Please perform functional verification under the corresponding experimental conditions in conjunction with the schematic diagram provided by our shop.
(2) The basic parameters of this module are in the details page, providing PDF information of the module information, source code of the routine, and no engineering files. Please inform the buyer, if you have any operation problems, please contact customer service.
(3) Buyers, before using the module, please read the details page of this module to understand the power supply and use restrictions, to avoid damage to the module due to improper operation.
(4) The modules of our shop are guaranteed to provide real module parameters, functions and pictures, and all modules are tested and shipped.
Module parameters:
Module model: AD7190
Module type: analog-to-digital conversion module
Module power supply: DC5V
Module current: 10mA (MAX)
Module communication protocol: SPI serial
Module provides routines: STM32F103RBT6
Routine platform: STM32F103X-M3 KEIL5 version source code
Module control signal level: 3.3V
Module input voltage range: 0-5V
Input impedance: 1M ohm
ADC resolution digits: 24 bits; effective bits 18 bits
Sampling rate: 4.8KSPS; single channel does not switch up to 4.8K, the sampling rate decreases when multiple channels are used
Number of input channels: 4-channel single-ended, 2-channel differential; time-shared sampling
Module input interface: 3.81-10PIN terminal
Reference voltage: external 2.5V; external input reference for soldered SOT-23 package
PGA mode: 6; 1 times, 8 times, 16 times, 32 times, 64 times, 128 times
Output mode: 4-channel data serial
Module features: multiple; low noise analog front end, optional digital filtering, zero delay characteristics
Module application: multiple types; load cell signal acquisition, motion signal acquisition, industrial signal acquisition
Module interface type: 3.81-10PIN socket, XH2.54 double-row pin data interface
Module description:
The AD7190 is a low noise complete analog front end suitable for high precision measurement applications. It integrates a low noise,24-bit analog-to-digital converter (ADC). On-chip programmable low-noise amplifier can adjust the signal to 1, 8,16, 32, 64, 128 times magnification, which means that small signals can be directly input for measurement.
The device can be configured as two differential inputs or four pseudo differential inputs. On-chip channel sequencer can enable multiple
Channels, the AD7190 performs conversions on each enabled channel in sequence, which simplifies communication with the device. sheet
The internal 4.92 MHz clock can be used as the clock source for the ADC; alternatively, an external clock or crystal oscillator can also be used. The
The output data rate of the device can be varied from 4.7Hz to 4.8kHz through register configuration.
Wiring method of load cell
Precautions for using the module:
(1) The module is a low-power module, and the power supply does not exceed 6V.
(2) Since the module is a high-precision device, in order to avoid unnecessary interference, it is recommended to use a linear power supply.
(3) It is recommended that the output signal line be as short as possible. If it is too long, noise signals may be easily introduced. Poor contact or poor quality wires may cause signal attenuation or excessive noise.
(4) The delivered code is only used for the supporting main control board. No single-chip microcomputer tutorial is provided. Functions other than product details display need to be developed by yourself.
(5) If you need to simply test the function of the module, it is recommended to use it with the control board of our store. After the correct wiring is completed, the control board can be powered to realize the signal acquisition display.
Frequently asked questions
Q: The AD7190 module is connected to a load cell. What is the range of weight that can be weighed? What is the accuracy?
A: The range that can be weighed is determined by the pressure sensor itself. Generally speaking, the accuracy of a sensor with a large range will be lower.
Q: Can AD7190 directly transfer data to PLC?
A: Generally speaking, the PLC level is not compatible with the AD7190 module. Our module is a 3.3V communication level. Generally, a single chip can be used for communication.
Q: Both AD7190 and ADS1256 are 24-bit ADCs, which are the same in many places. What is the difference in use?
A: Generally speaking, AD7190 is more used in load cells or pressure sensors. The true differential between channels and the ADS1256 are pseudo differential. The acquisition speed of ADS1256 is faster than that of AD7190.
Q: If I use the AD7190 and the matching main control board and use the USB port to supply power, I cannot collect a voltage of 5V?
A: Since the voltage of the universal USB port is lower than 5V, the power supply voltage of the AD7190 chip will be less than 5V, so the voltage of 5V cannot be collected. It is recommended to use the DC interface, power supply above 5V, but not more than 5.5V , So that you can collect a 5V voltage.
