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Analog-to-digital converters (ADCs)
Precision ADCs (<=10MSPS)

ADS127L01

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

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Data sheet

ADS127L01

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Number of input channels 1 Sample rate (Max) (kSPS) 512 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode Ext Input range (Max) (V) 3 Input range (Min) (V) 0 Features Daisy-Chainable, Wideband 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
Resolution (Bits) 24 Number of input channels 1 Sample rate (Max) (kSPS) 512 Interface type SPI Architecture Delta-Sigma Input type Differential Rating Catalog Reference mode Ext Input range (Max) (V) 3 Input range (Min) (V) 0 Features Daisy-Chainable, Wideband 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
TQFP (PBS) 32 49 mm² 7 x 7
  • 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
  • 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

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).

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
* Data sheet ADS127L01 24-Bit, High-Speed, Wide-Bandwidth Analog-to-Digital Converter datasheet (Rev. B) PDF | HTML 22 Sep 2016
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs PDF | HTML 23 Mar 2022
Application note A Basic Guide to Bridge Measurements PDF | HTML 18 Feb 2022
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 23 Aug 2021
E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
Application note Digital Filter Types in Delta-Sigma ADCs PDF | HTML 27 Jun 2017
EVM User's guide ADS127L01 Evaluation Module User's Guide (Rev. B) 24 Apr 2017
Technical article Go differential to differentiate your precision design 11 Aug 2016
White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016
Technical article Delta-sigma ADC digital filter types: Wideband filters 01 Jul 2016
Technical article Delta-sigma ADC digital filter types 13 May 2016

Design & development

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

Evaluation board

ADS127L01EVM — ADS127L01 Evaluation Module

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 (...)

User guide: PDF
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Simulation model

ADS127L01 IBIS Model

SBAM270.ZIP (67 KB) - IBIS Model
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Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

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 (...)
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Calculation tool

ADS127L010-EXCEL-TOOL-CALC — ADS127L01 Excel™ Calculator Tool

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 (...)
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Calculation tool

ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
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