Build with HX711 — Datasheet Specs & AI Design Help

00 — Overview

What the HX711 does

The HX711 is a precision 24-bit analog-to-digital converter designed for weigh scales and industrial control applications. It interfaces directly with bridge sensors using two selectable differential input channels with on-chip programmable gain of 32, 64, or 128. The device operates on a 2.6 to 5.5V supply, consuming less than 1.5mA in normal mode. It features an on-chip oscillator or external clock input, selectable output data rates of 10 or 80 samples per second, and simultaneous 50 and 60Hz supply rejection. The HX711 requires no external programming and simplifies digital interface initialization through an on-chip power-on-reset circuit. Typical applications include load cell measurement systems and industrial process control where high resolution and low noise are critical.

Next step

Start building with HX711 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for HX711
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	1.4 mA	—	(including regulator); Key Electrical Characteristics	Avia datasheet, p. 3 — Table 2 Key Electrical Characteristics
supply voltage range	2.6 V	—	5.5 V	Key Electrical Characteristics	Avia datasheet, p. 3 — Table 2 Key Electrical Characteristics
cmrr	—	100 dB	—	Key Electrical Characteristics	Avia datasheet, p. 3 — Table 2 Key Electrical Characteristics
operating temperature	-40 °C	—	85 °C		Avia datasheet, p. 1
clock frequency	1 MHz	11.1 MHz	20 MHz	crystal; Key Electrical Characteristics	Avia datasheet, p. 3 — Table 2 Key Electrical Characteristics
psrr	—	100 dB	—	Key Electrical Characteristics	Avia datasheet, p. 3 — Table 2 Key Electrical Characteristics
adc resolution	—	24 bit	—		Avia datasheet, p. 1
sample rate	—	10 Hz	—	Key Electrical Characteristics	Avia datasheet, p. 3 — Table 2 Key Electrical Characteristics
settling time	—	400 ms	—	Key Electrical Characteristics	Avia datasheet, p. 3 — Table 2 Key Electrical Characteristics
channel count	—	2	—		Avia datasheet, p. 1

02 — Alternatives

Closest matches to HX711

ADS131M02 1.9× higher operating temperature, 1.4× lower clock frequency, 1.3× lower psrr

ADS131M02IPWR 1.9× higher operating temperature, 1.4× lower clock frequency, 1.3× lower psrr

MCP3421 9.0× lower quiescent current, 1.5× lower settling time, 1.3× lower adc resolution

ADS1246 4.0× lower clock frequency, 1.9× higher operating temperature, 1.4× higher psrr

CS5530-IS 4.3× higher quiescent current, 2.2× lower clock frequency, 1.3× higher cmrr

ADS1255 1.6× lower supply voltage range, 1.4× lower psrr, 1.1× higher cmrr

LTC2400 7.0× lower quiescent current, 3.0× lower settling time, 1.6× higher operating temperature

ADS1220 8.0× lower settling time, 2.7× lower clock frequency, 1.9× higher operating temperature

03 — FAQ

Frequently asked questions

What is the ADC resolution of the HX711?

The ADC resolution is 24 bit.

How many channels does the HX711 have?

The HX711 has 2 channels.

What is the clock frequency when using a crystal?

The clock frequency is 11.1 MHz.

What is the CMRR specified in the Key Electrical Characteristics?

The CMRR is 100 dB.

What is the maximum operating temperature for the HX711?

The maximum operating temperature is 85 °C.

What is the Power Supply Rejection Ratio (PSRR) specified in the Key Electrical Characteristics?

The PSRR is 100 dB.

What is the quiescent current of the HX711 including the regulator?

The quiescent current is 1.4 mA (including regulator).

What is the sample rate specified in the Key Electrical Characteristics?

The sample rate is 10 Hz.

What is the settling time specified in the Key Electrical Characteristics?

The settling time is 400 ms.

What is the supply voltage range specified in the Key Electrical Characteristics?

The supply voltage range is 5.5 V.