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AD7190:  4.8 kHz Ultralow Noise 24-Bit Sigma-Delta ADC with PGA

Product Details


The AD7190 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC.

The device can be configured to have two differential inputs or four pseudo differential inputs. The on-chip channel sequencer allows several channels to be enabled, and the AD7190 sequentially converts on each enabled channel. This simplifies communication with the part. The on-chip 4.92 MHz clock can be used as the clock source to the ADC or, alternatively, an external clock or crystal can be used. The output data rate from the part can be varied from 4.7 Hz to 4.8 kHz.

The device has two digital filter options. The choice of filter affects the rms noise/noise-free resolution at the programmed output data rate, the settling time, and the 50 Hz/60 Hz rejection. For applications that require all conversions to be settled, the AD7190 includes a zero latency feature.

The part operates with 5 V analog power supply and a digital power supply from 2.7 V to 5.25 V. It consumes a current of 6 mA. It is housed in a 24-lead TSSOP package.

Applications

  • Weigh scales
  • Strain gauge transducers
  • Pressure measurement
  • Temperature measurement
  • Chromatography
  • PLC/DCS analog input modules
  • Data acquisition
  • Medical and scientific instrumentation

FEATURES and BENEFITS

  • Chinese data sheet available
  • RMS noise: 8.5 nV @ 4.7 Hz (gain = 128)
  • 16 noise free bits @ 2.4 kHz (gain = 128)
  • Up to 22.5 noise free bits (gain = 1)
  • Offset drift: 5 nV/°C
  • Gain drift: 1 ppm/°C
  • Specified drift over time
  • 2 differential/4 pseudo differential input channels
  • Qualified for automotive applications
  • See Data Sheet for Additional Information

AD7190 Functional Block Diagram

Learn how the ADC Active Functional Model is used to evaluate and debug the AD719x

Documentation

Title Content Type File Type
AD7190: 4.8 kHz Ultralow Noise 24-Bit Sigma-Delta ADC with PGA Data Sheet (Rev C, 02/2013) (pdf, 300 kB) Data Sheets PDF
AN-1131: Chopping on the AD7190, AD7192, AD7193, AD7194, and AD7195  (pdf, 125 kB) Application Notes PDF
AN-1084: Channel Switching: AD7190, AD7192, AD7193, AD7194, AD7195  (pdf, 118 kB) Application Notes PDF
AN-1069: Zero Latency for the AD7190, AD7192, AD7193, AD7194, and AD7195  (pdf, 82 kB) Application Notes PDF
AN-0979: Digital Filtering Options: AD7190, AD7192  (pdf, 141 kB) Application Notes PDF
CN-0102: Precision Weigh Scale Design Using the AD7190 24-Bit Sigma-Delta ADC with Internal PGA  (pdf) Circuit Note PDF
AD7190 Active Functional ADC Model
This video demonstrates how the ADC Active Functional Model is used to evaluate and debug the AD7190. The AD7190 is a low noise, complete AFE for high precision measurement applications; it contains a 24-bit sigma-delta ADC & a low noise gain stage.
Videos HTML
Tutorial on Technical and Performance Benefits of AD719x Family  (pdf, 4889 kB) Tutorials PDF
UG-222: Evaluation Board for the AD7190/AD7192 4.8 kHz Ultralow Noise 24-Bit Sigma-Delta ADCs  (pdf, 1137 kB) User Guides PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3  (pdf, 1334 kB) Solutions Bulletins PDF
FAQs for the AD719x family. FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Digital Filter Model Spreadsheets
These spreadsheet tools show the response of the digital filter section of the AD71xx and AD77xx devices based on input parameters.
Design Calculators HTML
AD7190 - Microcontroller No-OS Driver Device Drivers HTML
AD7192 IIO High Precision ADC Linux Driver (Wiki Site) Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Companion Products

Suggested Companion Products


Recommended Precision References for the AD7190

  • For low noise and low power applications, we recommend the ADR421.
  • For high current output applications, try the ADR431.
Recommended Precision Driver Amplifiers for the AD7190
  • For low noise and low power applications, we recommend the ADA4051-2.
  • For more precision and great temperature dirft specs, we recommend the AD8539.
  • For higher supply voltages up to +-8V, we recommend the AD8639.
, Recommended Digital Isolators for the AD7190
  • For isolated data and power, we recommend the ADuM3470 family in various channel configurations.

Recommended Linear Regulators for the AD7190

  • For powering the separate AVdd and DVdd supplies, we recommend the ADP3303.
Recommended Power Solutions for the AD7190
  • For a low noise positive LDO, For 5V systems we recommend the ADM7160, for 12V systems the ADP7118 and 24V systems the ADP7142.
  • For a low noise negative LDO, for 5V, 12V and 24V systems we recommend the ADP7182.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7190 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7190BRUZ Status: Production 24 ld TSSOP 24 Ind Tube, 62 $6.95 $5.90 Y  Material Info PCN Purchase Sample
AD7190BRUZ-REEL Status: Production 24 ld TSSOP 24 Ind Reel, 2500 - $5.90 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD7190 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7190EBZ Status: Production Evaluation Board $59.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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