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AD7190: 4.8 kHz Ultralow Noise 24-Bit Sigma-Delta ADC with PGA Data Sheet (Rev. C)6/26/2008PDF300 kB
Overview
Features and Benefits
- 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
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
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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AN-1131: Chopping on the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0)2/14/2015PDF125 kB
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AN-0979: Digital Filtering Options: AD7190, AD7192 (Rev. 0)2/14/2015PDF141 kB
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AN-1084: Channel Switching: AD7190, AD7192, AD7193, AD7194, AD7195 (Rev. 0)10/12/2010PDF118 kB
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AN-1069: Zero Latency for the AD7190, AD7192, AD7193, AD7194, and AD7195 (Rev. 0)4/4/2010PDF82 kB
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FAQs7/26/2017
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Tutorial on Technical and Performance Benefits of AD719x Family12/1/2010PDF4 M
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Digital Filters Sinc3 V's Sinc4 Differences and Trade Offs11/28/2018 -
Precision Sigma Delta Filtering Tutorial10/15/2018 -
Virtual Evaluation (VE) Tutorial10/15/2018
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Integrated Capacitive PGAs in ADCs: Redefining Performance8/1/2016 Analog Dialogue
Software & Systems Requirements
Tools & Simulations
Virtual Eval - BETA
Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.
Design Tools
XLS
AD7190/AD7192 Digital Filter Models
727 K
These tools show the response of the digital filter section of the AD71xx and AD77xx devices based on input parameters.
Reference Designs (1)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Support & Discussions
AD7190 Discussions
RE: EVAL-AD7190 Developer Board / No USB Connection
19 week(s) ago in Precision ADCs
Sample & Buy
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Sampling:
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.