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Convertidores analógico-digitales (ADC)
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ADS1235-Q1

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ADC delta-sigma de 24 bits, 7,2 kSPS y 3 canales de entrada diferencial para automoción con excitaci

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ADS1235-Q1

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Detalles del producto

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 Automotive 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 Automotive 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
VQFNP (RHM) 32 25 mm² (5 mm × 5 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • 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
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • 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-Q1 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-Q1 is available in a 5-mm × 5-mm VQFN package, and is specified across the –40°C to +125°C temperature range.

 

The ADS1235-Q1 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-Q1 is available in a 5-mm × 5-mm VQFN package, and is specified across the –40°C to +125°C temperature range.

 
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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 ADS1235-Q1 Automotive Precision, 3-Channel, Differential-Input, 7200-SPS, 24-Bit Delta-Sigma ADC for Bridge Sensors datasheet PDF | HTML 22/10/2019
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 A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML 13/03/2024
Nota sobre la aplicación Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29/03/2023
Nota sobre la aplicación Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 23/08/2021
Libro electrónico Fundamentals of Precision ADC Noise Analysis (Rev. A) 19/06/2020
Informe Automotive On-Board Weighing with ADS1261-Q1 9/01/2019

Diseño y desarrollo

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Placa de evaluación

ADS1235EVM — Módulo de evaluación ADS1235

El módulo de evaluación (EVM) ADS1235 es una plataforma para evaluar el convertidor analógico a digital (ADC) ADS1235. ADS1235 es un convertidor analógico a digital sigma-delta (ΔΣ) de baja derivación, 24 bits, 7200 SPS y 6 canales con un amplificador de ganancia programable (PGA) integrado para (...)

Guía del usuario: PDF
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Soporte de 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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Modelo de simulación

ADS1235 IBIS Model

SBAM401.ZIP (46 KB) - Modelo IBIS
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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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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFNP (RHM) 32 Ultra Librarian
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Soporte y capacitación

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