Hunan Jinlian Cloud Information Technology Co., Ltd.
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FEATURES
Single Channel
24-bit Analog to Digital Converter
Programmable Gain of 64 and 128
10Hz Default Data Rate (80Hz optional)
2.6 – 5.5 VDC Supply Voltage
Low Power Operation with Power Down Mode
Small Form Factor
Simple Connection (4/5 pin Connector)
INTERFACE
4 Wire SPI
APPLICATIONS
Weighing Scales
Industrial Process Control
Portable Instrumentation
Smart Transmitters
AVIALABLE ACCESORIES
5 pin Sensor Cable
4 pin Data Cable
Mounting Hardware
ELECTRICAL PARAMETERS
| Parameter | Value | Unit |
| Power Supply Voltage (VCC) | 2.6 – 5.5 | V |
| Nominal Current | 1.5 | mA |
| Power Down Current | 0.5 | uA |
| Common Mode Input | GND + 1.2 | V |
| VCC – 1.3 | V | |
| Output Settling Time | 400 | ms |
| Input Offset Drift | 0.2 | mV |
| (Gain = 128) | ||
| Temperature Drift | ±5 | ppm/°C |
| (Gain = 128) | ||
| Input Common Mode Rejection (Gain = 128) | 100 | dB |
| Power Supply Rejection (Gain = 128) | 100 | dB |
CONNECTION
| RED | Excitation + | RED | VCC | |
| BLACK | Excitation - | WHITE | DOUT | |
| WHITE | Output - | GREEN | SCK | |
| GREEN | Output + | BLACK | GND | |
| YELLOW | Shield |
In most applications, the Shield cable is left open and not connected to the load cell. However, when operating in environments with heavy machinery and high electromagnetic interference, connecting the Shield improves stability and EMC performance.
COMMUNICATIONS
The HX711-S utilizes a simple two-wire interface which can be connected directed to a microcontroller.
When data is not ready, DOUT is kept high and SCK is low. When data is ready DOUT set low. Data can then be retrieved by clocking in 25-27 clock pulses on the SCK pin. Each clock pulse shifts out one bit starting with the MSB until all 24 bits are shifted. The 25th clock pulse will pull DOUT back to high.
The last clock cycles indicates the Gain selection for the next conversion cycle. The Gain can be selected as shown in the table below. There must be no less than 25 and no more than 27 clock pulses in one conversion cycle to ensure proper operation of the serial interface. The first conversion after Reset will always be with a Gain of 128.
| SCK Clock Pulses | Gain |
| 25 | 128 |
| 27 | 64 |
Third party libraries are available for simple communication for HX711-S amplifier. Please contact our sales representative for references
POWER DOWN MODE
The HX711-S can be placed into power down mode by keeping SCK pin high for more than 60us. By returning the SCK to low, the amplifier will reset and resume normal operation. During low power mode, the external bridge sensor and the amplifier for minimal power consumption.
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1.How to place an order ?
Please provide us more details of what you want, such as: application, measurement range, output, accuracy, thread type, electric connector and other related parameters.
2.Does SNCoffer any discount ?
Yes, if you buy large QTY, please contact us, we will give you a big discount.
3.What terms of payment are available ?
We accept T/T, L/C, Trade assurance, Western Union, Paypal, etc.
4.When will you arrange the production ?
We will arrange the production immediately after receiving your payment.
5.How do you ensure good product quality ?
We have a complete quality control system, all of our products are fully checked by IQC, OQC departments
before shipping to our clients.
6.Do you have warranty ?
Yes, we provide 1 year warranty for most of our products. Some products we offer 15month to 24 months warranty.
Weight Scale Load Cell Amplifier HX711
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