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ADS1220

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24-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC w/ PGA, VREF, 2x IDACs & SPI interface

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24-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC w/ PGA, VREF, 2x IDACs & SPI interface

ADS1220

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 4 Sample rate (Max) (kSPS) 2 Interface SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int, Supply Input range (Max) (V) 2.85 , 5.6 Input range (Min) (V) -2.85, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), Oscillator, PGA, Temp Sensor Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 1.4 Analog voltage AVDD (Min) (V) 2.3 Analog voltage AVDD (Max) (V) 5.5 Digital supply (Min) (V) 2.3 Digital supply (Max) (V) 5.5 Approx. price (US$) 3.48 | 1ku open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TSSOP (PW) 16 22 mm² 5 x 4.4 TSSOP (PW) 16 - VQFN (RVA) 16 12 mm² 3.5 x 3.5 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Low Current Consumption:
    As Low as 120 µA (typ) in Duty-Cycle Mode
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 V/V to 128 V/V
  • Programmable Data Rates: Up to 2 kSPS
  • Up to 20-Bits Effective Resolution
  • Simultaneous 50-Hz and 60-Hz Rejection at
    20 SPS with Single-Cycle Settling Digital Filter
  • Two Differential or Four Single-Ended Inputs
  • Dual Matched Programmable Current Sources:
    10 µA to 1.5 mA
  • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
  • Internal 2% Accurate Oscillator
  • Internal Temperature Sensor:
    0.5°C (typ) Accuracy
  • SPI-Compatible Interface (Mode 1)
  • Package: 3.5-mm × 3.5-mm × 0.9-mm VQFN
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Description

The ADS1220 is a precision, 24-bit, analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor.

The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128 V/V. This PGA makes the ADS1220 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors. The device supports measurements of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for single-ended measurements.

Power consumption is as low as 120 µA when operating in duty-cycle mode with the PGA disabled. The ADS1220 is offered in a leadless VQFN-16 or a TSSOP-16 package and is specified over a temperature range of –40°C to +125°C.

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Technical documentation

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No results found. Please clear your search and try again. View all 19
Type Title Date
* Datasheet ADS1220 4-Channel, 2-kSPS, Low-Power, 24-Bit ADC with Integrated PGA and Reference datasheet (Rev. C) Aug. 19, 2016
Application notes ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. A) Mar. 09, 2020
Application notes K-type thermocouple measurement circuit with precision ADC Mar. 19, 2019
Application notes A Basic Guide to Thermocouple Measurements Sep. 28, 2018
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application notes A Basic Guide to RTD Measurements Jun. 19, 2018
Application notes Low-Cost, Single-Chip, Diff Temp Measurement Solution Using Delta-Sigma ADCs (Rev. A) May 04, 2018
Application notes Thermocouple Temperature Measurements Using Isolated Amplifiers (Rev. A) Aug. 11, 2017
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
Application notes Reducing System Cost, Size and Power in Isolated DAQ Systems Using ADS122U04 (Rev. A) Jun. 15, 2017
White papers Fully integrated signal and power isolation – applications and benefits Feb. 10, 2017
Technical articles The real secret to become a better cook. Integrate smart scale technology in kitchen appliances. Oct. 25, 2016
Technical articles Delta-sigma ADC digital filter types May 13, 2016
Technical articles Aliasing in ADCs: Not all signals are what they appear to be Sep. 04, 2015
Technical articles Help! My data converter’s giving bad data! What’s wrong? Aug. 07, 2015
More literature Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
User guides ADS1x20EVM User's Guide Jul. 12, 2013
More literature Temperature Sensing Apr. 22, 2013
Application notes RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 Mar. 13, 2013

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 (...)

View details
EVALUATION BOARDS Download
document-generic User guide
Description

The ADS1220EVM is an evaluation system for the ADS1220, a 24-bit, multi-channel, delta-sigma (ΔΣ) analog-to-digital converter (ADC). The EVM uses the ADS1220 along with minimal circuitry to demonstrate functionality for prototyping and part evaluation. The pins of the ADS1220 are (...)

Features
  • Contains all support circuitry needed for the ADS1220
  • +5V or +3.3V power-supply options for ADC
  • Voltage reference options: external or on-board
  • Easy-to-use evaluation software for Microsoft™ Windows XP and Windows 7
  • Built-in analysis tools including scope, FFT, and histogram displays
  • Data collection to (...)
View details
EVALUATION BOARDS Download
document-generic User guide
$499.00
Description

PLABS-SAR-EVM-PDK is an experimental platform used in conjunction with TI Precision Labs videos to gain a deeper understanding of successive approximation register (SAR) analog-to-digital converter (ADC) circuits. The evaluation module (EVM) platform contains two channels for common SAR (...)

Features
  • Intuitive setup – PCB overlay shows the schematic
  • No external power supply required
  • Includes several coupon boards with different driving amplifier RC filters to facilitate experimentation
  • Ships with PHI controller - provides convenient interface to EVM over USB 2.0 (or higher) for power delivery (...)
View details

Software development

SUPPORT SOFTWARE Download
SBAC227.ZIP (51 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM171A.ZIP (82 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
  • (...)
View details

Reference designs

REFERENCE DESIGNS Download
Wireless Mesh Network for Predictive Maintenance Reference Design
TIDA-01439 — This reference design can be used to quickly establish a wireless mesh network that connects various types of sensors directly to the Internet. Inputs like RS232, RS485 or RTD are on the board to collect data for predictive maintenance from different sensors and machines. For data processing a high (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Ultra-Small IO-Link Sensor Transmitter with RTD Front End Reference Design
TIDA-01335 — This reference design demonstrates the IO-Link communication in a small form factor of just 6mm PCB width with integrated protection and a resistance temperature detector (RTD) sensor front-end. The highly integrated and tiny IO-Link PHY offers: ESD, EFT, surge protection and reverse polarity (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
RTD Temperature Transmitter for 2-wire, 4 to 20-mA Current Loop Systems
TIDA-00095 — This comprehensive design provides a complete system that measures and processes temperature signals  inputs from 2-wire, 3-wire, and 4-wire resistance temperature detectors (RTDs) and outputs a 4 to 20-mA current-loop signal corresponding to the temperature processed from the RTD inputs. It is (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
IO-Link Adapter Reference Design for Sensors with Analog 4-20mA Output
TIDA-00457 — The TIDA-00457 TI Design is an IO-Link adapter which evaluates the binary or analog 4-20mA output signal of sensors in the industrial environment and forwards the results to the PLC via IO-Link. All this is fitting in a 6mm wide PCB compatible with the industry standard M12 connector.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Wireless Thermocouple Sensor Transmitter DevPack for SensorTag Reference Design
TIDA-00650 — The TIDA-00650 reference design shows how to build a wireless thermocouple based temperature transmitter. The design is in the DevPack form factor which can be used in combination with TIs SensorTag. This allows for the development of a wireless link with Bluetooth® Smart or other wireless (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Isolated Loop Powered Thermocouple Transmitter Reference Design
TIDA-00189 — The Isolated Loop powered Thermocouple Transmitter reference design is a system solution providing precision K-type thermocouple measurements for 4 to 20-mA isolated current-loop applications. This design is intended as an evaluation module for users to fast prototype and develop end-products for (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
1g Resolution over 15kg Range Sub-100nVpp Noise Front-End Reference Design
TIDA-00765 — TIDA-00765 is a less than 100nVpp analog front end for resistive strain gauge bridge load cell-based weight and vibration measurement. It is ideally suited for appliances, which require high-resolution due to large dynamic range or have considerable weight offset. In the face of significant levels (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
IO-Link Sensor Transmitter Reference Design
TIDA-00188 — This TI Design offers a rapid prototyping platform for IO-Link sensor transmitter. Thanks to its modular design, different sections can be easily cut away to allow fast and simple interfacing of any analog or digital sensor.  The system is programmed with a fully validated IO-Link stack (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Fast Prototyping 24bit Sigma-Delta ADC with Energia Ecosystem Reference Design
TIDA-00647 — The TIDA-00647 TIDesign showcases a Sigma-Delta ADC BoosterPack for TI Launchpad and how to proceed to a fast prototyping evaluation with Energia leading analog performances evaluation within minutes. The generic fast prototyping is then taken through steps to build an example implementation for (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Small Form Factor, 2-Wire 4 to 20mA Current Loop RTD Temperature Transmitter Reference Design
TIDA-00165 — This is a reference design for a robust, low power, precise and long-term stable 2-wire loop powered 4 to 20mA current output temperature transmitter. It uses RTD temperature sensor with 4 to 20mA current loop transmitter. It also explains sensor signal conditioning, ratiometric measurement (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Optimized Latency, Power and Memory Footprint Thermocouple Sensing Front-end Reference Design
TIDA-00468 — The TIDA-00468 Reference design shows how to build an isolated thermocouple sensing front-end with optimized power-consumption for loop powered application while:
• reducing footprint from classical look-up table approach and
• keeping the fast response time of linear piece wise interpolation
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Thermocouple AFE Using RTD or Integrated Temperature Sensor for Cold Junction Compensation (CJC)
TIDA-00168 — The sole objective of this reference design is to provide comprehensive details on how to design a simple, robust, and accurate analog front end (AFE) circuit for making precision temperature measurements with thermocouple sensors. TIDA-00168 explains the theory, operation, and complications (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Temperature Sensor Interface Module for Programmable Logic Controllers (PLC)
TIDA-00018 — The TIDA-00018 reference design enables faster development of high precision temperature measurement solutions using 24-Bit delta-sigma ADC and most widely used temperature sensors like thermocouple and RTD. The design guide will address the sensor signal conditioning, thermocouple cold junction (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 16 View options
VQFN (RVA) 16 View options

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Videos

How to measure RTDs with Delta-Sigma ADC

Precision temperature measurement with Delta-Sigma analog-to-digital converters

Posted: 24-Jan-2018
Duration: 03:54

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