HX711 Datasheet – 24-Bit ADC Converter – AVIA

This is one of the ADC Converter types.

Part Number : HX711

Function : 24-Bit Analog-to-Digital Converter (ADC) for Weigh Scales

Package : SOP-16 Type

Manufactures : AVIA SEMICONDUCTOR ( aviaic.com )


HX711 image


Based on Avia Semiconductor’s patented technology, HX711 is a precision 24-bit analog to-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor. The input multiplexer selects either Channel A or B differential input to the low-noise programmable gain amplifier (PGA). Channel A can be programmed with a gain of 128 or 64, corresponding to a full-scale differential input voltage of ±20mV or ±40mV respectively, when a 5V supply is connected to AVDD analog power supply pin. Channel B has a fixed gain of 32. On chip power supply regulator eliminates the need for an external supply regulator to provide analog power for the ADC and the sensor. Clock input is flexible. It can be from an external clock source, a crystal, or the on-chip oscillator that does not require any external component. On-chip power on-reset circuitry simplifies digital interface initialization.

HX711 Pinout

HX711 datasheet pinout

Pin # Name Function Description
1 VSUP Power Regulator supply: 2.7 ~ 5.5V
2 BASE Analog Output Regulator control output(NC when not used)
3 AVDD Power Analog supply: 2.6 ~ 5.5V
4 VFB Analog Input Regulator control input(connect to AGND when not used)
5 AGND Ground Analog Ground
6 VBG Analog Output Reference bypass output
7 INA- Analog Input Channel A negative input
8 INA+ Analog Input Channel A positive input
9 INB- Analog Input Channel B negative input
10 INB+ Analog Input Channel B positive input
11 PD_SCK Digital Input Power down control (high active) and serial clock input
12 DOUT Digital Output Serial data output
13 XO Digital I/O Crystal I/O (NC when not used)
14 XI Digital Input Crystal I/O or external clock input, 0: use on-chip oscillator
15 RATE Digital Input Output data rate control, 0: 10Hz; 1: 80Hz
16 DVDD Power Digital supply: 2.6 ~ 5.5V

HX711 Features

1. Two selectable differential input channels
2. On-chip active low noise PGA with selectable gain of 32, 64 and 128
3. On-chip power supply regulator for load-cell and ADC analog power supply
4. On-chip oscillator requiring no external component with optional external crystal
5. On-chip power-on-reset
6. Simple digital control and serial interface


1. Weigh Scales
2. Industrial Process Control

HX711 Datasheet


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STi7141 Datasheet – HD Decoder for digital cable set-top box

This post explains for the semiconductor STi7141.

The Part Number is STi7141. The Package is PBGA 580 + 100 balls, 35 x 35 mm Type.

The function of this semiconductor is HD decoder for interactive digital cable set-top box .

Manufacturers : STMicroelectronics

Image :

STi7141 decoder datasheet


Description :

The STi7141 is a highly integrated SoC (systemon-chip) designed to meet the demanding needs of the interactive cable set top box market place. The STi7141 integrates all the major system functions into a single device, and provides world leading, multi-layer, advanced security technologies to protect valuable video and audio assets.


Application Circuit

STi7141 application

The STi7141 is a low-cost, networkable, HDTV set-top box device, with an embeded
DOCSIS cable modem capable of providing DSG (DOCSIS set-top gateway), interactive
multimedia and internet access for the digital cable market.


1. Three integrated cable receiver / demodulators
2. DOCSIS/EuroDOCSIS 2.0 cable modem with support for DOCSIS 3.0 down-stream channelbonding
3. SCTE-55 part 1 and 2 physical layer support for CableCARDTM
4. Dual Core architecture providing more than 1600 DMIPS of processing performance

Ordering Number : STi7141ZWA


STi7141 Datasheet

STi7141 pdf

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