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ADS1218

AKTIV

8-kanaliger ADC, 24 Bit 780 SPS, mit Flash-Speicher, VREF, Puffer, 2 IDACs, seriellem Ausgang, digit

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ADS124S08 AKTIV Delta-Sigma-ADC, 12 Kanäle, 24 Bit, 4 kSPS, mit PGA und Spannungsreferenz für die Sensormessung More analog inputs (12), faster sample rate (4 kSPS)

ADS1218

AKTIV
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Produktdetails

Resolution (Bits) 24 Sample rate (max) (ksps) 0.78 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.8 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 0.78 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.8 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
TQFP (PFB) 48 81 mm² 9 x 9
  • 24 BITS NO MISSING CODES
  • 0.0015% INL
  • 22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)
  • 4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25V
  • PGA FROM 1 TO 128
  • SINGLE CYCLE SETTLING MODE
  • PROGRAMMABLE DATA OUTPUT RATES UP TO 1kHz
  • PRECISION ON-CHIP 1.25V/2.5V REFERENCE:
    ACCURACY: 0.2%
    DRIFT: 5ppm/°C
  • EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5V
  • ON-CHIP CALIBRATION
  • PIN-COMPATIBLE WITH ADS1216
  • SPI™ COMPATIBLE
  • 2.7V TO 5.25V
  • < 1mW POWER CONSUMPTION
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL
    • LIQUID/GAS CHROMATOGRAPHY
    • BLOOD ANALYSIS
    • SMART TRANSMITTERS
    • PORTABLE INSTRUMENTATION
    • WEIGHT SCALES
    • PRESSURE TRANSDUCERS

SPI is a trademark of Motorola.
All trademarks are the property of their respective owners.
  • 24 BITS NO MISSING CODES
  • 0.0015% INL
  • 22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)
  • 4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25V
  • PGA FROM 1 TO 128
  • SINGLE CYCLE SETTLING MODE
  • PROGRAMMABLE DATA OUTPUT RATES UP TO 1kHz
  • PRECISION ON-CHIP 1.25V/2.5V REFERENCE:
    ACCURACY: 0.2%
    DRIFT: 5ppm/°C
  • EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5V
  • ON-CHIP CALIBRATION
  • PIN-COMPATIBLE WITH ADS1216
  • SPI™ COMPATIBLE
  • 2.7V TO 5.25V
  • < 1mW POWER CONSUMPTION
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL
    • LIQUID/GAS CHROMATOGRAPHY
    • BLOOD ANALYSIS
    • SMART TRANSMITTERS
    • PORTABLE INSTRUMENTATION
    • WEIGHT SCALES
    • PRESSURE TRANSDUCERS

SPI is a trademark of Motorola.
All trademarks are the property of their respective owners.

The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits.

The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/A) converter provides an offset correction with a range of 50% of the FSR (Full-Scale Range).

The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for ratiometric conversion. The on-board current DACs (Digital-to-Analog Converters) operate independently with the maximum current set by an external resistor.

The serial interface is SPI-compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1218 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.

The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits.

The eight input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit Digital-to-Analog (D/A) converter provides an offset correction with a range of 50% of the FSR (Full-Scale Range).

The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable sinc filter. The reference input is differential and can be used for ratiometric conversion. The on-board current DACs (Digital-to-Analog Converters) operate independently with the maximum current set by an external resistor.

The serial interface is SPI-compatible. Eight bits of digital I/O are also provided that can be used for input or output. The ADS1218 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet 8-Channel, 24-Bit, Analog-to-Digital Converter with FLASH Memory datasheet (Rev. C) 26 Sep 2005
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 18 Mär 2024
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mär 2023
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 19 Jun 2020
Application note Measuring Temperature with the ADS1216, ADS1217, or ADS1218 (Rev. B) 16 Nov 2017
Application note Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 18 Mai 2015
Application note The Offset DAC (Rev. A) 01 Apr 2015
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mär 2015
Application note Calibration Routines and Register Value Generation for the ADS121x Series 19 Jun 2003
Application note Inputs Currents for High-Resolution ADCs 06 Mär 2003

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