ADS1257

ACTIVO

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

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 mm × 5 mm)
  • 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 Descargar la versión más reciente en inglés Fecha
* Hoja de datos ADS1257 30-kSPS, 4-Channel, 24-Bit ADC with PGA in 5-mm × 5-mm VQFN Package datasheet (Rev. B) PDF | HTML 19/04/2016
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 QFN and SON PCB Attachment (Rev. C) PDF | HTML 6/12/2023
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

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 (...)

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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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Modelo de simulación

ADS1257 IBIS MODEL

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

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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.

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (RGW) 20 Ultra Librarian

Pedidos y calidad

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Soporte y capacitación

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