ADS127L21

ACTIVO

ADC delta-sigma de ancho de banda amplio de 24 bits y 512 kSPS con filtros IIR y FIR programables

Detalles del producto

Resolution (Bits) 24 Sample rate (max) (ksps) 1365 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Rating Catalog TI functional safety category Functional Safety-Capable Reference mode External Input voltage range (max) (V) 5 Input voltage range (min) (V) 0 Features Daisy-Chainable, Oscillator, Small Size, Wideband Operating temperature range (°C) -40 to 125 Analog supply voltage (min) (V) 2.85 Analog supply voltage (max) (V) 5.5 SNR (dB) 110 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
Resolution (Bits) 24 Sample rate (max) (ksps) 1365 Number of input channels 1 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Rating Catalog TI functional safety category Functional Safety-Capable Reference mode External Input voltage range (max) (V) 5 Input voltage range (min) (V) 0 Features Daisy-Chainable, Oscillator, Small Size, Wideband Operating temperature range (°C) -40 to 125 Analog supply voltage (min) (V) 2.85 Analog supply voltage (max) (V) 5.5 SNR (dB) 110 Digital supply (min) (V) 1.65 Digital supply (max) (V) 5.5
WQFN (RUK) 20 9 mm² 3 x 3
  • Programmable FIR filter
  • Programmable IIR filter
  • Wideband or low-latency filter modes
  • Programmable data rates:
    • Wideband filter: 512kSPS
    • Low-latency filter: 1.365MSPS
  • Conversion latency (low-latency filter): 3µs
  • AC accuracy with dc precision:
    • Dynamic range (200kSPS): 111.5dB (typical)
    • THD: –125dB (typical)
    • INL: 0.4ppm of FSR (typical)
    • Offset drift: 50nV/°C (typical)
    • Gain drift: 0.5ppm/°C (typical)
  • Power-scalable speed ranges:
    • Max speed: 512kSPS, 33mW (typical)
    • High speed: 400kSPS, 26mW (typical)
    • Mid speed: 200kSPS, 14mW (typical)
    • Low speed: 50kSPS, 4.3mW (typical)
  • Input range: ±VREF or ±2VREF
  • Buffered inputs
  • Internal or external clock operation
  • Functional Safety-Capable
  • Programmable FIR filter
  • Programmable IIR filter
  • Wideband or low-latency filter modes
  • Programmable data rates:
    • Wideband filter: 512kSPS
    • Low-latency filter: 1.365MSPS
  • Conversion latency (low-latency filter): 3µs
  • AC accuracy with dc precision:
    • Dynamic range (200kSPS): 111.5dB (typical)
    • THD: –125dB (typical)
    • INL: 0.4ppm of FSR (typical)
    • Offset drift: 50nV/°C (typical)
    • Gain drift: 0.5ppm/°C (typical)
  • Power-scalable speed ranges:
    • Max speed: 512kSPS, 33mW (typical)
    • High speed: 400kSPS, 26mW (typical)
    • Mid speed: 200kSPS, 14mW (typical)
    • Low speed: 50kSPS, 4.3mW (typical)
  • Input range: ±VREF or ±2VREF
  • Buffered inputs
  • Internal or external clock operation
  • Functional Safety-Capable

The ADS127L21 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) featuring programmable digital filters. This digital filter has data rates up to 512kSPS using the wideband filter and up to 1365kSPS using the low-latency filter. The device offers an excellent combination of ac performance and dc precision with low power consumption.

Programmable infinite and finite impulse response (IIR and FIR) digital filters allow custom filter profiles, such as A-weighting compensation and frequency notch filters. The wideband or low-latency filter option optimize ac-signal performance or data throughput of dc signals, all in one device.

The low-drift modulator achieves excellent dc precision with low wideband noise for outstanding ac performance. The power-scalable architecture features four speed modes to optimize data rate, resolution, and power consumption. Signal and reference input buffers reduce driver loading for increased accuracy.

The serial interface features daisy-chain capability to reduce the number of signal lines over an isolation barrier. SPI input data and register memory contents are validated by cyclic-redundancy check (CRC) to enhance operational reliability.

The small 3mm × 3mm WQFN package is designed for space-limited applications. The device is fully specified for operation over the –40°C to +125°C temperature range.

The ADS127L21 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) featuring programmable digital filters. This digital filter has data rates up to 512kSPS using the wideband filter and up to 1365kSPS using the low-latency filter. The device offers an excellent combination of ac performance and dc precision with low power consumption.

Programmable infinite and finite impulse response (IIR and FIR) digital filters allow custom filter profiles, such as A-weighting compensation and frequency notch filters. The wideband or low-latency filter option optimize ac-signal performance or data throughput of dc signals, all in one device.

The low-drift modulator achieves excellent dc precision with low wideband noise for outstanding ac performance. The power-scalable architecture features four speed modes to optimize data rate, resolution, and power consumption. Signal and reference input buffers reduce driver loading for increased accuracy.

The serial interface features daisy-chain capability to reduce the number of signal lines over an isolation barrier. SPI input data and register memory contents are validated by cyclic-redundancy check (CRC) to enhance operational reliability.

The small 3mm × 3mm WQFN package is designed for space-limited applications. The device is fully specified for operation over 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 Fecha
* Data sheet ADS127L21 512kSPS, Programmable Filter, 24-Bit, Wideband Delta-Sigma ADC datasheet (Rev. C) PDF | HTML 13 ago 2025
Application note A Simple, Java-Based CRC Calculator PDF | HTML 04 mar 2026
Application note Design Considerations for Multiple Wide Bandwidth Delta- Sigma ADCs in Simultaneous-Sampling Systems (Rev. A) PDF | HTML 29 dic 2025
Application note Anti-Alias Filter Design for a 100kHz Bandwidth Data Acquisition Signal Chain (Rev. A) PDF | HTML 27 feb 2025
Application brief Using TI ADCs for Noise, Vibration, and Harshness Measurements PDF | HTML 03 dic 2024
Functional safety information ADS1x7Lx1x Functional Safety FIT Rate, FMD and Pin FMA (Rev. C) PDF | HTML 26 sep 2024
Application note Achieve High SNR with the PGA855, Fully Differential Programmable-Gain Amplifier PDF | HTML 21 mar 2024
Application brief Benefits of Integrated FIR and IIR Filters in Delta-Sigma ADCs PDF | HTML 11 may 2023
Application note Four Channel Analog to Digital Interface with Sitara AM243x MCU+ PDF | HTML 20 abr 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 mar 2023

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

ADS127L21EVM-PDK — Módulo de evaluación de ADS127L21 para ADC con entradas fáciles de manejar y filtros de banda ancha

ADS127L21EVM-PDK es una plataforma de evaluación para el convertidor analógico a digital (ADC) ADS127L21 delta-sigma (ΔΣ) de 24 bits y alta velocidad, con filtro de ancho de banda amplio personalizado. El kit de evaluación incluye la placa ADS127L21EVM, la placa controladora PHI y el software de (...)
Guía del usuario: PDF | HTML
Soporte de software

ADS127L21-C-EXAMPLE-CODE ADS127L21 example C code

Expedite your embedded design using this example C code for the ADS127L21
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Modelo de simulación

ADS127L21 IBIS Model

SBAM498.IBS (534 KB) - IBIS Model
Herramienta de cálculo

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

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Herramienta de diseño

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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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TINA-TI — Programa de simulación analógica basado en SPICE

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Diseños de referencia

TIDA-010945 — Diseño de ref. de cadena de señ. de adq. de datos y multímetros dig. de precisión de baja deriva

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Design guide: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (RUK) 20 Ultra Librarian

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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