ADS1235

AKTIV

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

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Datenblatt

document-pdfAcrobat ADS1235 Precision, 3-Channel, Differential-Input, 7200-SPS, 24-Bit Delta-Sigma ADC for Bridge Sensors datasheet (Englisch) PDF | HTML

ADS1235

AKTIV

Jetzt bestellen

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 mm × 5 mm)

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
*	Datenblatt	ADS1235 Precision, 3-Channel, Differential-Input, 7200-SPS, 24-Bit Delta-Sigma ADC for Bridge Sensors datasheet	PDF \| HTML	28.09.2018
	Anwendungshinweis	Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A)	PDF \| HTML	18.03.2024
	Anwendungshinweis	A Basic Guide to Bridge Measurements (Rev. A)	PDF \| HTML	13.03.2024
	Anwendungshinweis	Digital Filter Types in Delta-Sigma ADCs (Rev. A)	PDF \| HTML	29.03.2023
	Anwendungshinweis	Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A)	PDF \| HTML	23.08.2021
	Application brief	Reduce Bridge Measurement Offset and Drift Using the AC Excitation Mode (Rev. A)	PDF \| HTML	01.04.2021
	E-book	Fundamentals of Precision ADC Noise Analysis (Rev. A)		19.06.2020

Design und Entwicklung

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Evaluierungsplatine

ADS1235EVM — ADS1235-Evaluierungsmodul

Das ADS1235-Evaluierungsmodul (EVM) ist eine Plattform zur Evaluierung des ADS1235-Analog-Digital-Wandlers (ADC). Der ADS1235 ist ein driftarmer 24-Bit-, 7200-SPS-, 6-Kanal-Delta-Sigma (ΔΣ)-ADC mit integriertem PGA für rauscharme Brückenmessungen. Dieser sensorfähige ADC bietet eine hochgenaue (...)

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