ADS127L01

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24-Bit, 512kSPS, 1-Ch, Very-Low-Power, Wide-Bandwidth Delta-Sigma ADC

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 1 Sample rate (Max) (kSPS) 512 Interface SPI Architecture Delta-Sigma Input type Differential Multi-channel configuration Rating Catalog Reference mode Ext Input range (Max) (V) 3 Input range (Min) (V) 0 Features Daisy-Chainable Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 7 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 115.5 Analog voltage AVDD (Max) (V) 3.6 Digital supply (Min) (V) 1.7 Digital supply (Max) (V) 3.6 Approx. price (US$) 6.12 | 1ku open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TQFP (PBS) 32 49 mm² 7 x 7 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Data Rates: Up to 512 kSPS
  • AC + DC Performance:
    • Passband: Up to 230 kHz
    • SNR: Up to 115.5 dB
    • THD: Down to –129 dB
    • DC Accuracy:
    • Offset Drift: 1.5 µV/°C
    • Gain Drift: 0.2 ppm/°C
  • Operating Modes:
    • High-resolution (128 kSPS at 26 mW)
    • Low-power (128 kSPS at 15 mW)
    • Very-low Power: 105 dB SNR (128 kSPS at 9 mW)
  • Digital Filter Options:
    • Low-latency Filter: Sinc Frequency Response
    • Wideband 1 Filter:
      (0.45 to 0.55) × fDATA Transition Band
    • Wideband 2 Filter: (0.40 to 0.50) × fDATA Transition Band
  • SPI™ or Frame-Sync Serial Interface
    • Daisy-Chain Compatible
  • Analog Supply: 2.7 V to 3.6 V
  • Digital Supply: 1.7 V to 3.6 V
  • Operating Temperature: –40°C to +125°C
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Description

The ADS127L01 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) with data rates up to 512 kSPS. This device offers a unique combination of excellent dc accuracy and outstanding ac performance. The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The integrated decimation filter suppresses modulator out-of-band noise. In addition to al low-latency filter, the ADS127L01 provides multiple Wideband filters with less than ±0.00004 dB of ripple, and an option for –116-dB stop-band attenuation at the Nyquist rate.

Traditionally, industrial delta-sigma ADCs that offer good drift performance use digital filters with large passband droop. As a result, industrial delta-sigma ADCs have limited signal bandwidth and are mostly suited for dc measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly weaker than industrial counterparts. The ADS127L01 combines these converters, providing high-precision industrial measurement with excellent dc and ac specifications over an extended industrial temperature range of –40°C to +125°C.

A variety of operating modes allow for optimization of speed, resolution, and power. A programmable serial interface with one of three options (SPI, frame-sync slave, or frame-sync master) provides convenient interfacing across isolation barriers to microcontrollers or digital signal processors (DSPs).

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Technical documentation

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Type Title Date
* Datasheet ADS127L01 24-Bit, High-Speed, Wide-Bandwidth Analog-to-Digital Converter datasheet (Rev. B) Sep. 22, 2016
Application notes Communication Methods for Data Integrity Using Delta-Sigma Data Converters Jun. 01, 2020
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
User guides ADS127L01 Evaluation Module User's Guide (Rev. B) Apr. 24, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Technical articles Go differential to differentiate your precision design Aug. 11, 2016
White papers Voltage-reference impact on total harmonic distortion Aug. 01, 2016
Technical articles Delta-sigma ADC digital filter types: Wideband filters Jul. 01, 2016
Technical articles Delta-sigma ADC digital filter types May 13, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
Description

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)

EVALUATION BOARDS Download
document-generic User guide
Description

The ADS127L01EVM is an evaluation platform for the ADS127L01. The ADS127L01 is a 24-bit, delta-sigma analog-to-digital converter (ADC) with data rates up to 512 kSPS. It offers a unique combination of excellent dc accuracy and outstanding ac perforamnce. The high-order, chopper-stabilized modulator (...)

Features
  • Includes all require support circuitry for the ADS127L01
  • Enhanced evaluation software enables quicker configuration and analysis
  • Configurable inputs, references, supplies and clock sources
  • Easily accessible signals via testpoints and headers
GUIS FOR EVALUATION MODULES (EVM) Download
ADS127L01 Excel™ Calculator Tool
ADS127L010-EXCEL-TOOL-CALC
Description
The ADS127L01 Excel calculator tool provides the user with several easy-to-use tools to simplify the configuration of the ADS127L01. The tool helps the user understand the different settings and operating modes that aid in optimizing a design with the ADS127L01 wide-bandwidth analog-to-digital (...)
Features
  • Complete register map
  • ADC code conversions
  • CRC calculator
  • Digital filter plot
  • Multiple device configuration
  • SNR estimator

Design tools & simulation

SIMULATION MODELS Download
SBAM270.ZIP (67 KB) - IBIS Model
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

Reference designs

REFERENCE DESIGNS Download
Low Power, Low Noise 24b Analog Front-End Reference Design for DAQ and Wireless Sensor IoT Systems
TIDA-01013 — The need for lower power, lower noise analog front-ends (AFE) is becoming increasingly important in many applications today, such as data acquisition systems (DAQs), field instrumentation, Internet-of-Things (IoT), and automatic test equipment. In many cases, this need is highlighted by the advent (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Universal data concentrator reference design supporting Ethernet, 6LoWPAN RF mesh and more
TIDA-010032 — IPv6-based grid communications are becoming the standard choice in industrial markets and applications like smart meters and grid automation. The universal data concentrator design provides a complete IPv6-based network solution integrated with Ethernet backbone communication, 6LoWPAN RF mesh (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
IEPE Vibration Sensor Interface for PLC Analog Input Reference Design
TIDA-01471 — Industrial vibration sensing is crucial part in condition monitoring necessary for predictive maintenance. Integrated Electronic Piezoelectric (IEPE) sensor is the most common vibration sensor used in industrial environment. This design is a full analog front-end for IEPE sensor interface (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TQFP (PBS) 32 View options

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