4.8 kHz Ultralow Noise 24-Bit Sigma-Delta ADC with PGA
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.
- Weigh scales
- Strain gauge transducers
- Pressure measurement
- Temperature measurement
- PLC/DCS analog input modules
- Data acquisition
- Medical and scientific instrumentation
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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.
The EVAL-AD7190EBZ is a fully featured evaluation board for the AD7190. The evaluation board can be operated in standalone mode ( either battery-powered or with external power supply) or connected to a PC via a standard USB interface. When operated with a PC, software is provided enabling the user to perform detailed analysis of the ADC's performance.
Recommended Precision Driver Amplifiers
Recommended Precision References
Recommended Digital Isolators
- For isolated data and power , we recommend the ADUM3470 .
Recommended Linear Regulators
- For powering the separate AVdd and DVdd supplies , we recommend the ADP3303 .
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Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3
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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.