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Convertidores analógico-digitales (ADC)
ADC de precisión

ADS1218

ACTIVO

ADC de 24 bits y 780 SPS con memoria Flash, 8 canales, VREF, búfer, 2 IDAC, salida serie, E/S digita

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ADS124S08 ACTIVO ADC delta-sigma de 24 bits, 4 kSPS, 12 canales con PGA y referencia de tensión para la medición de s More analog inputs (12), faster sample rate (4 kSPS)

ADS1218

ACTIVO
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Detalles del producto

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 mm × 9 mm)
  • 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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos 8-Channel, 24-Bit, Analog-to-Digital Converter with FLASH Memory datasheet (Rev. C) 26/09/2005
Nota sobre la aplicación Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 18/03/2024
Nota sobre la aplicación Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29/03/2023
Libro electrónico Fundamentals of Precision ADC Noise Analysis (Rev. A) 19/06/2020
Nota sobre la aplicación Measuring Temperature with the ADS1216, ADS1217, or ADS1218 (Rev. B) 16/11/2017
Nota sobre la aplicación Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 18/05/2015
Nota sobre la aplicación The Offset DAC (Rev. A) 1/04/2015
Libro electrónico Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19/03/2015
Nota sobre la aplicación Calibration Routines and Register Value Generation for the ADS121x Series 19/06/2003
Nota sobre la aplicación Inputs Currents for High-Resolution ADCs 6/03/2003

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Herramienta de cálculo

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

La calculadora del ingeniero analógico está diseñada para acelerar muchos de los cálculos repetitivos que los ingenieros de diseño de circuitos analógicos utilizan de forma habitual. Esta herramienta para PC proporciona una interfaz gráfica con una lista de varios cálculos comunes que van desde el (...)

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Herramienta de diseño

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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Pedidos y calidad

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

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Si tiene alguna pregunta sobre calidad, encapsulados o pedido de productos de TI, consulte el servicio de asistencia de TI. ​​​​​​​​​​​​​​

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