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Convertidores analógico-digitales (ADC)
ADC de precisión

ADS1255

ACTIVO

ADC Delta-Sigma de 24 bits, 30 kSPS, ruido muy bajo

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Hoja de datos

ADS1255

ACTIVO
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Detalles del producto

Resolution (Bits) 24 Sample rate (max) (ksps) 30 Number of input channels 2 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) 36 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 2 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) 36 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
SSOP (DB) 20 56.16 mm² (7.2 mm × 7.8 mm)
  • 24 Bits, No Missing Codes
    • All Data Rates and PGA Settings
  • Up to 23 Bits Noise-Free Resolution
  • ±0.0010% Nonlinearity (max)
  • Data Output Rates to 30kSPS
  • Fast Channel Cycling
    • 18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHz
  • One-Shot Conversions with Single-Cycle Settling
  • Flexible Input Multiplexer with Sensor Detect
    • Four Differential Inputs (ADS1256 only)
    • Eight Single-Ended Inputs (ADS1256 only)
  • Chopper-Stabilized Input Buffer
  • Low-Noise PGA: 27nV Input-Referred Noise
  • Self and System Calibration for All PGA Settings
  • 5V Tolerant SPI™-Compatible Serial Interface
  • Analog Supply: 5V
  • Digital Supply: 1.8V to 3.6V
  • Power Dissipation
    • As Low as 38mW in Normal Mode
    • 0.4mW in Standby Mode
  • 24 Bits, No Missing Codes
    • All Data Rates and PGA Settings
  • Up to 23 Bits Noise-Free Resolution
  • ±0.0010% Nonlinearity (max)
  • Data Output Rates to 30kSPS
  • Fast Channel Cycling
    • 18.6 Bits Noise-Free (21.3 Effective Bits) at 1.45kHz
  • One-Shot Conversions with Single-Cycle Settling
  • Flexible Input Multiplexer with Sensor Detect
    • Four Differential Inputs (ADS1256 only)
    • Eight Single-Ended Inputs (ADS1256 only)
  • Chopper-Stabilized Input Buffer
  • Low-Noise PGA: 27nV Input-Referred Noise
  • Self and System Calibration for All PGA Settings
  • 5V Tolerant SPI™-Compatible Serial Interface
  • Analog Supply: 5V
  • Digital Supply: 1.8V to 3.6V
  • Power Dissipation
    • As Low as 38mW in Normal Mode
    • 0.4mW in Standby Mode

The ADS1255 and ADS1256 are extremely low-noise, 24-bit analog-to-digital (A/D) converters. They provide complete high-resolution measurement solutions for the most demanding applications.

The converter is comprised of a 4th-order, delta-sigma (ΔΣ) modulator followed by a programmable digital filter. A flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. The selectable input buffer greatly increases the input impedance and the low-noise programmable gain amplifier (PGA) provides gains from 1 to 64 in binary steps. The programmable filter allows the user to optimize between resolution of up to 23 bits noise-free and data rate of up to 30k samples per second (SPS). The converters offer fast channel cycling for measuring multiplexed inputs and can also perform one-shot conversions that settle in just a single cycle.

Communication is handled over an SPI-compatible serial interface that can operate with a 2-wire connection. Onboard calibration supports both self and system correction of offset and gain errors for all the PGA settings. Bidirectional digital I/Os and a programmable clock output driver are provided for general use. The ADS1255 is packaged in an SSOP-20, and the ADS1256 in an SSOP-28.

The ADS1255 and ADS1256 are extremely low-noise, 24-bit analog-to-digital (A/D) converters. They provide complete high-resolution measurement solutions for the most demanding applications.

The converter is comprised of a 4th-order, delta-sigma (ΔΣ) modulator followed by a programmable digital filter. A flexible input multiplexer handles differential or single-ended signals and includes circuitry to verify the integrity of the external sensor connected to the inputs. The selectable input buffer greatly increases the input impedance and the low-noise programmable gain amplifier (PGA) provides gains from 1 to 64 in binary steps. The programmable filter allows the user to optimize between resolution of up to 23 bits noise-free and data rate of up to 30k samples per second (SPS). The converters offer fast channel cycling for measuring multiplexed inputs and can also perform one-shot conversions that settle in just a single cycle.

Communication is handled over an SPI-compatible serial interface that can operate with a 2-wire connection. Onboard calibration supports both self and system correction of offset and gain errors for all the PGA settings. Bidirectional digital I/Os and a programmable clock output driver are provided for general use. The ADS1255 is packaged in an SSOP-20, and the ADS1256 in an SSOP-28.
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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 Very Low Noise, 24-Bit Analog-to-Digital Converter datasheet (Rev. K) 17/09/2013
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
Informe Designing an Accurate, Multifunction Lithium-Ion Battery-Testing Solution 24/09/2020
Libro electrónico Fundamentals of Precision ADC Noise Analysis (Rev. A) 19/06/2020
Guía del usuario ADS1256EVM and ADS1256EVM-PDK (Rev. E) 14/11/2018
Nota sobre la aplicación Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 18/05/2015
Libro electrónico Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19/03/2015
Nota sobre la aplicación Seismic Sensor Demonstration Using an ADS1255 and TMS320VC5510A DSP (Rev. A) 29/01/2009
Nota sobre la aplicación Using Ceramic Resonators with the ADS1255/6 9/07/2004

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

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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

ADS1255 IBIS Model

SBAM108.ZIP (72 KB) - Modelo IBIS
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Herramienta de cálculo

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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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Diseño de referencia

TIDA-00155 — Diseño de referencia del espectrómetro de infrarrojo cercano DLP para análisis óptico de líquidos y

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TIDA-00554 — Espectrómetro DLP Ultra-mobile NIR para análisis químico portátil con conectividad Bluetooth

The ultra-mobile near-infrared (NIR) spectrometer reference design utilizes Texas Instruments' DLP technology in conjunction with a single-element InGaAs detector to deliver high performance measurements in a portable form factor that is more affordable than architectures using an expensive InGaAs (...)

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SSOP (DB) 20 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

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Soporte y capacitación

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

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