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ADS1235

AKTIV

Differenzieller Delta-Sigma-ADC, 24 Bit, 7,2 kSPS, 3 Kanäle, mit PGA und AC-Anregung für Brückensens

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ADS1235

AKTIV
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Produktdetails

Resolution (Bits) 24 Sample rate (max) (ksps) 7.2 Number of input channels 5 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.5, 5 Input voltage range (min) (V) -2.5, 0 Features 50/60 Hz Rejection, GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 23 Analog supply voltage (min) (V) -2.5, 4.75 Analog supply voltage (max) (V) 2.5, 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 7.2 Number of input channels 5 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.5, 5 Input voltage range (min) (V) -2.5, 0 Features 50/60 Hz Rejection, GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 23 Analog supply voltage (min) (V) -2.5, 4.75 Analog supply voltage (max) (V) 2.5, 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
VQFN (RHB) 32 25 mm² 5 x 5
  • 24-Bit, High-Precision ADC
    • 120,000 Noise-Free Counts
      (10-mV Input, 10 SPS)
    • Offset Drift: 1 nV/°C
    • Gain Drift: 0.5 ppm/°C
  • Three Differential or Five Single-Ended Inputs
  • Two Reference Inputs
  • Wide Input Voltage Range: ±7 mV to ±5 V
  • Low-Noise PGA, Gain: 1, 64, and 128
  • Data Rate: 2.5 SPS to 7200 SPS
  • AC- or DC-Bridge Excitation Option
  • Chop Mode for Zero Drift Operation
  • Simultaneous 50-Hz and 60-Hz Rejection Mode
  • Single-Cycle Settling Mode
  • Missing Reference Input Monitor
  • Signal Overrange Monitor
  • Temperature Sensor
  • Cyclic Redundancy Check (CRC)
  • 5-V or ±2.5-V Power Supply
  • 24-Bit, High-Precision ADC
    • 120,000 Noise-Free Counts
      (10-mV Input, 10 SPS)
    • Offset Drift: 1 nV/°C
    • Gain Drift: 0.5 ppm/°C
  • Three Differential or Five Single-Ended Inputs
  • Two Reference Inputs
  • Wide Input Voltage Range: ±7 mV to ±5 V
  • Low-Noise PGA, Gain: 1, 64, and 128
  • Data Rate: 2.5 SPS to 7200 SPS
  • AC- or DC-Bridge Excitation Option
  • Chop Mode for Zero Drift Operation
  • Simultaneous 50-Hz and 60-Hz Rejection Mode
  • Single-Cycle Settling Mode
  • Missing Reference Input Monitor
  • Signal Overrange Monitor
  • Temperature Sensor
  • Cyclic Redundancy Check (CRC)
  • 5-V or ±2.5-V Power Supply

The ADS1235 is a precision, 7200-SPS, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA). This device also includes diagnostic features such as PGA overrange and reference monitors. The ADC provides high-accuracy, zero-drift conversion data for high-precision equipment, including weigh scales, strain gauges, and resistive pressure sensors.

The ADC has signal and reference multiplexers that support three differential signal inputs and two reference inputs. The ADC also includes a low-noise PGA that provides gains of 1, 64, and 128. The ADC also has a 24-bit ΔΣ modulator and programmable digital filter.

The high-impedance inputs (1 GΩ) of the PGA reduce measurement error that is caused by sensor loading.

The ADC supports ac-bridge excitation to remove the drift errors from the sensor wiring. The ADC provides the clock control signals for the ac-excitation operation.

The flexible digital filter is programmable for single-cycle settled conversions, and provides 50-Hz and 60-Hz line cycle rejection at the same time.

The ADS1235 is available in a 5-mm × 5-mm QFN package, and is specified across the –40°C to +125°C temperature range.

 

The ADS1235 is a precision, 7200-SPS, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA). This device also includes diagnostic features such as PGA overrange and reference monitors. The ADC provides high-accuracy, zero-drift conversion data for high-precision equipment, including weigh scales, strain gauges, and resistive pressure sensors.

The ADC has signal and reference multiplexers that support three differential signal inputs and two reference inputs. The ADC also includes a low-noise PGA that provides gains of 1, 64, and 128. The ADC also has a 24-bit ΔΣ modulator and programmable digital filter.

The high-impedance inputs (1 GΩ) of the PGA reduce measurement error that is caused by sensor loading.

The ADC supports ac-bridge excitation to remove the drift errors from the sensor wiring. The ADC provides the clock control signals for the ac-excitation operation.

The flexible digital filter is programmable for single-cycle settled conversions, and provides 50-Hz and 60-Hz line cycle rejection at the same time.

The ADS1235 is available in a 5-mm × 5-mm QFN package, and is specified across the –40°C to +125°C temperature range.

 
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet ADS1235 Precision, 3-Channel, Differential-Input, 7200-SPS, 24-Bit Delta-Sigma ADC for Bridge Sensors datasheet PDF | HTML 28 Sep 2018
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 18 Mär 2024
Application note A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML 13 Mär 2024
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mär 2023
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 23 Aug 2021
Application brief Reduce Bridge Measurement Offset and Drift Using the AC Excitation Mode (Rev. A) PDF | HTML 01 Apr 2021
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 19 Jun 2020

Design und Entwicklung

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ADS1235EVM — ADS1235-Evaluierungsmodul

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Support-Software

ADS1235-C-EXAMPLE-CODE — ADS1235 example C code

Expedite your embedded design using this example C code for the ADS1235
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SBAR015 — ADS1235 Design Calculator

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