The AD7192 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 AD7192 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 AD7192 includes a zero latency feature.
The part operates with a power supply from 3 V to 5.25 V. It consumes a current of 4.35 mA. It is housed in a 24-lead TSSOP package.
|Title||Content Type||File Type|
|AD7192: 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA Data Sheet (Rev A, 05/2009) (pdf, 305 kB)||Data Sheets|
AN-1186: Radiated Immunity Performance of the AD7192 in Weigh Scale Applications
(pdf, 461 kB)
|AN-1131: Chopping on the AD7190, AD7192, AD7193, AD7194, and AD7195 (pdf, 125 kB)||Application Notes|
|AN-1084: Channel Switching: AD7190, AD7192, AD7193, AD7194, AD7195 (pdf, 118 kB)||Application Notes|
|AN-1069: Zero Latency for the AD7190, AD7192, AD7193, AD7194, and AD7195 (pdf, 82 kB)||Application Notes|
|AN-0979: Digital Filtering Options: AD7190, AD7192 (pdf, 141 kB)||Application Notes|
|CN-0251: A Flexible 4-Channel Analog Front End for Wide Dynamic Range Signal Conditioning (pdf, 217 kB)||Circuit Note|
|CN-0119: Precision Weigh Scale Design Using the AD7192 24-Bit Sigma-Delta ADC with Internal PGA (pdf, 190 kB)||Circuit Note|
|Tutorial on Technical and Performance Benefits of AD719x Family (pdf, 4889 kB)||Tutorials|
|UG-222: Evaluation Board for the AD7190/AD7192 4.8 kHz Ultralow Noise 24-Bit Sigma-Delta ADCs (pdf, 1137 kB)||User Guides|
|MS-2210: Designing Power Supplies for High Speed ADC (pdf, 327 kB)||Technical Articles|
High-resolution ADCs — an overview
The dramatic reduction in the cost of high-resolution ADCs brings a number of benefits to designers.
(Electronic Products, 4/23/2010)
|Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3 (pdf, 1334 kB)||Solutions Bulletins|
|FAQs for the AD719x family.||FAQs/RAQs||HTML|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
|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.
|AD7190 - Microcontroller No-OS Driver||Device Drivers||HTML|
|AD7192 IIO High Precision ADC Linux Driver (Wiki Site)||Device Drivers||HTML|
Recommended Precision References for the AD7192
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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.