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Rp10.500
HX711 ADC Load Cell Loadcell Amplifier Module Modul Weight Sensor Berat High Precision 24-Bit AD Conversion Adapter
Rp10.500
Barang, merk, kode dan spesifikasi sesuai foto
Untuk design dan permintaan khusus bisa hubungi kami di Deskripsi Toko ELTECH online
HX711
The HX711 is a precision 24-bit analog-to-digital converter (ADC) manufactured by Avia Semiconductor.
It is specifically designed to amplify and digitize small electrical signals from standard four-wire Wheatstone bridge strain gauges or load cells used in weigh scales.
The original, complete technical reference document is accessible directly via the SparkFun HX711 English Datasheet PDF.
Core Technical Specifications:
- ADC Resolution: 24-bit (Sigma-Delta) converter architecture.
- Operating Voltage Range: Dual-supply capability supporting 2.6 to 5.5V (3.3V) and 5V microcontroller environments).
- Current Consumption: Highly efficient, drawing less than 1.5mA during active measurement and dropping down below 1uA in power-down mode.
- Selectable Data Output Rates: Hardwired configuration allows choosing between 10Hz or 80Hz sampling rates.
- Noise and Filtering: Integrates simultaneous 50Hz and 60Hz power supply noise rejection lines when configured at the 10Hz data rate.
- Operating Temperature Limit: Rated to run robustly from -40C up to +85C.
Input Channels and Gain Selection.
The IC provides two selectable differential input channels to manage sensor bridge signals.
The integrated Low-Noise Programmable Gain Amplifier (PGA) adjusts input sensitivity dynamically based on the clock cycles pulsed during communication:
- Channel A: Supports selectable gains of 128 (default, mapping to a full-scale differential input of 20mV) or 64 (mapping to 40mV).
- Channel B: Fixed gain of 32, yielding a full-scale differential input range of 80mV, typically reserved for system-level functions like battery health monitoring.
16-Pin SOP Package Configuration
The physical chip splits its functionality cleanly down its 16-pin layout to separate highly sensitive analog lines from the noisy digital interface:
Pin NumberPin NamePin Function:
Pin-1 = VSUP : Main analog power supply input
Pin-2 = BASE : Regulator control output for an external PNP transistor
Pin-3 = AVDD : Regulated analog power supply output
Pin-4= VFB : Regulator feedback input pin
Pin-5 = AGND : Isolated analog system ground reference
Pin-6 = VBG : On-chip bandgap reference bypass voltage output (1.25V)
Pin-7 = INA- : Channel A differential negative analog input
Pin-8 = INA+ : Channel A differential positive analog input
Pin-9 = INB- : Channel B differential negative analog input
Pin-10 = INB+ : Channel B differential positive analog input
Pin-11 = PD_SCK : Power-down control input and serial communication clock input
Pin-12 = DOUT : Serial data output pin
Pin-13 = XO : External crystal oscillator output
Pin-14 = XI : External crystal oscillator input (tied to DGND for internal oscillator)
Pin-15 = RATE : Output data rate control pin (0=10Hz, High=80Hz)
Pin-16 = DVDD : Main digital power supply input (2.6V to 5.5V)
Serial Interface Protocol (2-Wire)
The device does not follow standard I2C or strict hardware SPI; it utilizes a simple proprietary two-wire protocol requiring only a Clock (PD_SCK) and a Data (DOUT) line:
1. Polling: Wait until the DOUT pin drops from high to low. This state change indicates that new conversion data is processed and ready to retrieve.
2. Data Retrieval: Shift out 24 bits of data using standard MSB-first formatting by pulsing the PD_SCK pin 24 times consecutively.
3. Gain/Channel Selection: Send between 1 and 3 extra clock pulses directly after shifting out the 24th bit. This dictates the source input configuration and amplifier gain for the next measurement cycle:
- 25 Pulses total: Next sample uses Channel A, Gain = 128.
- 26 Pulses total: Next sample uses Channel B, Gain = 32.
- 27 Pulses total: Next sample uses Channel A, Gain = 64.
If you are writing code for this chip, let me know if you need an Arduino code implementation, specific pin-to-load-cell wiring guides, or help calculating calibration factors.
Untuk design dan permintaan khusus bisa hubungi kami di Deskripsi Toko ELTECH online
HX711
The HX711 is a precision 24-bit analog-to-digital converter (ADC) manufactured by Avia Semiconductor.
It is specifically designed to amplify and digitize small electrical signals from standard four-wire Wheatstone bridge strain gauges or load cells used in weigh scales.
The original, complete technical reference document is accessible directly via the SparkFun HX711 English Datasheet PDF.
Core Technical Specifications:
- ADC Resolution: 24-bit (Sigma-Delta) converter architecture.
- Operating Voltage Range: Dual-supply capability supporting 2.6 to 5.5V (3.3V) and 5V microcontroller environments).
- Current Consumption: Highly efficient, drawing less than 1.5mA during active measurement and dropping down below 1uA in power-down mode.
- Selectable Data Output Rates: Hardwired configuration allows choosing between 10Hz or 80Hz sampling rates.
- Noise and Filtering: Integrates simultaneous 50Hz and 60Hz power supply noise rejection lines when configured at the 10Hz data rate.
- Operating Temperature Limit: Rated to run robustly from -40C up to +85C.
Input Channels and Gain Selection.
The IC provides two selectable differential input channels to manage sensor bridge signals.
The integrated Low-Noise Programmable Gain Amplifier (PGA) adjusts input sensitivity dynamically based on the clock cycles pulsed during communication:
- Channel A: Supports selectable gains of 128 (default, mapping to a full-scale differential input of 20mV) or 64 (mapping to 40mV).
- Channel B: Fixed gain of 32, yielding a full-scale differential input range of 80mV, typically reserved for system-level functions like battery health monitoring.
16-Pin SOP Package Configuration
The physical chip splits its functionality cleanly down its 16-pin layout to separate highly sensitive analog lines from the noisy digital interface:
Pin NumberPin NamePin Function:
Pin-1 = VSUP : Main analog power supply input
Pin-2 = BASE : Regulator control output for an external PNP transistor
Pin-3 = AVDD : Regulated analog power supply output
Pin-4= VFB : Regulator feedback input pin
Pin-5 = AGND : Isolated analog system ground reference
Pin-6 = VBG : On-chip bandgap reference bypass voltage output (1.25V)
Pin-7 = INA- : Channel A differential negative analog input
Pin-8 = INA+ : Channel A differential positive analog input
Pin-9 = INB- : Channel B differential negative analog input
Pin-10 = INB+ : Channel B differential positive analog input
Pin-11 = PD_SCK : Power-down control input and serial communication clock input
Pin-12 = DOUT : Serial data output pin
Pin-13 = XO : External crystal oscillator output
Pin-14 = XI : External crystal oscillator input (tied to DGND for internal oscillator)
Pin-15 = RATE : Output data rate control pin (0=10Hz, High=80Hz)
Pin-16 = DVDD : Main digital power supply input (2.6V to 5.5V)
Serial Interface Protocol (2-Wire)
The device does not follow standard I2C or strict hardware SPI; it utilizes a simple proprietary two-wire protocol requiring only a Clock (PD_SCK) and a Data (DOUT) line:
1. Polling: Wait until the DOUT pin drops from high to low. This state change indicates that new conversion data is processed and ready to retrieve.
2. Data Retrieval: Shift out 24 bits of data using standard MSB-first formatting by pulsing the PD_SCK pin 24 times consecutively.
3. Gain/Channel Selection: Send between 1 and 3 extra clock pulses directly after shifting out the 24th bit. This dictates the source input configuration and amplifier gain for the next measurement cycle:
- 25 Pulses total: Next sample uses Channel A, Gain = 128.
- 26 Pulses total: Next sample uses Channel B, Gain = 32.
- 27 Pulses total: Next sample uses Channel A, Gain = 64.
If you are writing code for this chip, let me know if you need an Arduino code implementation, specific pin-to-load-cell wiring guides, or help calculating calibration factors.
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