High-Resolution, Low-Drift, Precision Weigh-Scale Reference Design with AC Bridge Excitation

(ACTIVE) TIPD188

Description & Features

Technical Documents

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View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Key Document

Description

This precision weigh-scale reference design achieves greater than 50,000 noise-free counts of resolution. Offset and offset drift errors are nearly eliminated by ac bridge excitation. This design takes advantage of the high-resolution ADS1262 delta-sigma ADC.

Features
  • >50,000 noise-free count weigh-scale solution
  • Operating temperature range: -40 ᵒC to +125 ᵒC
  • Less than 1 μV total error across temperature range
  • ADC Supply and Bridge Excitation Voltage: 5V
  • Bridge Output: 0 V to 10 mV
  • Firmware provides ADS1262 example code
  • This robust circuit reference design includes theory, complete error analysis, component selection, simulation, PCB design, example code, and measured data that correlates with the theory and simulation.

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS1262  32-Bit, 38kSPS, 10-Ch Delta-Sigma ADC w/ PGA & Voltage Reference for Factory Automation  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ADS1263  32-Bit, 38kSPS, 10-Ch Delta-Sigma ADC w/ PGA, Voltage Reference & Aux. ADC for Factory Automation  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5529  16-Bit Ultra-Low-Power Microcontroller, 128KB Flash, 8KB RAM, USB, 12Bit ADC, 2 USCIs, 32Bit HW MPY  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
TS5A21366  0.75-Ohm Dual SPST Analog Switch with 1.8-V compatible input logic  Switches and Multiplexers  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1675 17 Jul 2015 853
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 193 20 Jul 2015 68
PDF 176 20 Jul 2015 338
Related Tools & Software

Design Kits & Evaluation Modules (1)

Name Part Number Tool Type
MSP430F5529 USB LaunchPad Evaluation Kit  MSP-EXP430F5529LP  Evaluation Modules & Boards 

Software (2)




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