HX711 SMD IC 24 Bit ADC SOIC16 HX711

Product Overview: The C43656.pdf (HX711) is a precision 24-bit analog-to-digital converter (ADC) engineered specifically for weigh scales and industrial process control applications, allowing for a direct interface with bridge sensors. It utilizes Avia Semiconductor's patented technology to provide a high-performance solution for small signal acquisition.

Key Features

• Selectable Channels & Gain: Features two selectable differential input channels. The active, low-noise Programmable Gain Amplifier (PGA) allows for selectable gains of 32, 64, and 128.

• Integrated Power Management: It includes an on-chip analog power supply regulator, eliminating the need for an external supply to power the ADC and the load cell.

• Clocking: An on-chip oscillator is provided that requires no external components; however, an external crystal or reference clock may also be used.

• Control: Simple digital control via a serial interface is achieved through pin-driven commands, requiring no internal register programming.

• Data Rate: Supports selectable output data rates of 10SPS or 80SPS.

Electrical and Operating Specifications

• Supply Voltage Range: 2.6V to 5.5V.

• Temperature Range: Operates effectively between -40°C and +85°C.

• Current Consumption: Consumes approximately 1.5mA during normal operation and 2µA in power-down mode.

• Package: Housed in a 16-pin SOP-16 package.

Functional Details

• Serial Interface: Communication for data retrieval and control is managed via the PD_SCK and DOUT pins.

• Input Selection: Users select the input channel and gain by the number of pulses applied to the PD_SCK pin:

  • 25 pulses: Channel A, Gain 128

  • 26 pulses: Channel B, Gain 32

  • 27 pulses: Channel A, Gain 64

• Power-Down Mode: By holding the PD_SCK pin high for more than 60µs, the device enters a power-down mode. Returning the pin to a low state restores normal operation.