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

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 ...More

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

Product Description

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

  • 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
  • See Data Sheet for Additional Information

Diagrams

AD7190 Functional Block Diagram
AD7190 Functional Block Diagram

Specifications

Resolution (Bits) 24bit
T-Put Rate 4.8kSPS
# Chan 5
Supply V Multi(+5Anlg, +3.3Dig),Multi(+5Anlg, +3Dig),Multi(+5Anlg, +5Dig),Multi(+5Anlg, 3.6Dig)
Pwr Diss 36.8mW
Interface Ser,SPI
Ain Range (2Vref/PGA Gain) p-p
SNR (dB) n/a
Pkg Type SOP

Explore Other Products

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AD7780 - 24-Bit Pin-Programmable Low Power Σ−Δ ADC

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Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7190 24 4.8KSPS 5 36.8mW
AD7192 24 4.8KSPS 4 27.5mW
AD7766 24 128KSPS 1 18mW
AD7767 24 128KSPS 1 18mW
AD7714 24 1KSPS 5 7mW
AD7682 16 250KSPS 4 19.2mW
AD7984 18 1.33MSPS 1 14mW
AD7982 18 1MSPS 1 8.6mW
AD7678 18 100KSPS 1 26mW
AD7690 18 400KSPS 1 20mW
AD7689 16 250KSPS 8 19.2mW
Pricing, Packaging & Availability

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Status
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  • Pre-Release: The model has not been released to general production, but samples may be available.
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  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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.

Production Availability
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Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

*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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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