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Convertidores analógico-digitales (ADC)
ADC de precisión

ADS1257

ACTIVO

ADC industrial de 24 bits, 30 kSPS y 4 canales con PGA integrada

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ADS1257

ACTIVO
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Detalles del producto

Resolution (Bits) 24 Sample rate (max) (ksps) 30 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 38 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 1.8 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 30 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 38 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 1.8 Digital supply (max) (V) 3.6
VQFN (RGW) 20 25 mm² 5 x 5
  • Up to 23-Bits Noise-Free Resolution
  • Small 5-mm × 5-mm VQFN Package
  • 4 Analog Inputs
    • 2 Differential or 3 Single-Ended Measurements
  • Excellent DC Performance
    • Offset Drift: 4 nV/°C (Gain = 64)
    • Gain Drift: 0.8 ppm/°C
    • Nonlinearity: 3 ppm (Gain = 1)
  • Programmable Data Rates: 2.5 SPS to 30 kSPS
  • Single-Cycle Settled Conversions (≤ 1000 SPS)
  • 50-Hz and 60-Hz Rejection
  • High Impedance Input Buffer
  • Differential-Input PGA
  • Integrated Sensor Break Detection
  • 2 General-Purpose Input/Outputs
  • Power Supplies:
    • Analog: 5 V
    • Digital: 1.8 V to 3.6 V
  • 5-V Tolerant SPI™-Compatible Serial Interface
  • Up to 23-Bits Noise-Free Resolution
  • Small 5-mm × 5-mm VQFN Package
  • 4 Analog Inputs
    • 2 Differential or 3 Single-Ended Measurements
  • Excellent DC Performance
    • Offset Drift: 4 nV/°C (Gain = 64)
    • Gain Drift: 0.8 ppm/°C
    • Nonlinearity: 3 ppm (Gain = 1)
  • Programmable Data Rates: 2.5 SPS to 30 kSPS
  • Single-Cycle Settled Conversions (≤ 1000 SPS)
  • 50-Hz and 60-Hz Rejection
  • High Impedance Input Buffer
  • Differential-Input PGA
  • Integrated Sensor Break Detection
  • 2 General-Purpose Input/Outputs
  • Power Supplies:
    • Analog: 5 V
    • Digital: 1.8 V to 3.6 V
  • 5-V Tolerant SPI™-Compatible Serial Interface

The ADS1257 is a low-noise, 30-kSPS, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with an integrated multiplexer (mux), input buffer, and programmable gain amplifier (PGA) in a small 20-pin, 5-mm × 5-mm VQFN package. The combination of integration, high conversion rate, and 24-bit resolution together in a small package makes the device ideally suited for space-constrained applications.

The input multiplexer accepts either two differential or three single-ended input measurements. The sensor-break detection circuit verifies the input connection continuity to the ADC. The selectable input buffer greatly increases the input impedance, and in many cases, eliminates the need for external buffers. The buffer input voltage range includes AGND. The low-noise PGA provides gains from 1 to 64 to accommodate a wide range of inputs signals. The programmable digital filter optimizes ADC resolution (up to 23 bits noise-free) and conversion rates (up to 30 kSPS). The digital filter provides single-cycle settled conversions, and rejection of 50-Hz and 60-Hz interference signals.

The SPI-compatible serial interface operates with as little as three wires, simplifying connections to external controllers. Integrated calibration features support both self and system correction of offset and gain errors for all PGA gain settings. Two bidirectional digital I/Os pins control external circuits.

The ADS1257 is a low-noise, 30-kSPS, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with an integrated multiplexer (mux), input buffer, and programmable gain amplifier (PGA) in a small 20-pin, 5-mm × 5-mm VQFN package. The combination of integration, high conversion rate, and 24-bit resolution together in a small package makes the device ideally suited for space-constrained applications.

The input multiplexer accepts either two differential or three single-ended input measurements. The sensor-break detection circuit verifies the input connection continuity to the ADC. The selectable input buffer greatly increases the input impedance, and in many cases, eliminates the need for external buffers. The buffer input voltage range includes AGND. The low-noise PGA provides gains from 1 to 64 to accommodate a wide range of inputs signals. The programmable digital filter optimizes ADC resolution (up to 23 bits noise-free) and conversion rates (up to 30 kSPS). The digital filter provides single-cycle settled conversions, and rejection of 50-Hz and 60-Hz interference signals.

The SPI-compatible serial interface operates with as little as three wires, simplifying connections to external controllers. Integrated calibration features support both self and system correction of offset and gain errors for all PGA gain settings. Two bidirectional digital I/Os pins control external circuits.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet ADS1257 30-kSPS, 4-Channel, 24-Bit ADC with PGA in 5-mm × 5-mm VQFN Package datasheet (Rev. B) PDF | HTML 19 abr 2016
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) PDF | HTML 18 mar 2024
Application note A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML 13 mar 2024
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 dic 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 mar 2023
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) 19 jun 2020

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.

Placa de evaluación

ADS1256EVM-PDK — Kit de demostración de rendimiento ADS1256

El ADS1256EVM-PDK es un kit completo de evaluación/demostración que combina el ADS1256EVM con la placa madre MMB0 basada en DSP para su uso con una computadora personal. La placa madre MMB0 permite conectar el ADS1256EVM a una computadora a través de un puerto USB. El ADS1256EVM-PDK se controla (...)

Guía del usuario: PDF
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Soporte de software

ADS1256-C-EXAMPLE-CODE — ADS1256 example C code

Expedite your embedded design using this example C code for the ADS1256 product family
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Soporte de software

SBAC145 — ADS1255-7 Design Calculator

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Productos y hardware compatibles
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Modelo de simulación

ADS1257 IBIS MODEL

SLAM276.ZIP (71 KB) - IBIS Model
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Herramienta de cálculo

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

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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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.
Productos y hardware compatibles

Productos y hardware compatibles
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Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® para TI es un entorno de diseño y simulación que ayuda a evaluar la funcionalidad de los circuitos analógicos. Esta completa suite de diseño y simulación utiliza un motor de análisis analógico de Cadence®. Disponible sin ningún costo, PSpice para TI incluye una de las bibliotecas de modelos (...)
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Herramienta de simulación

TINA-TI — Programa de simulación analógica basado en SPICE

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Guía del usuario: PDF
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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RGW) 20 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

Soporte y capacitación

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

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