AD7719:  Low Voltage, Low Power, 16-/24-Bit, Dual Sigma Delta ADC

The AD7719 is a complete analog front-end for low frequency measurement applications. It contains two high-resolution sigma delta ADCs, switchable matched excitation current sources, low-side power ...More

AD7719:  Low Voltage, Low Power, 16-/24-Bit, Dual Sigma Delta ADC

Product Description

The AD7719 is a complete analog front-end for low frequency measurement applications. It contains two high-resolution sigma delta ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port and temperature sensor. The 24-bit main channel with PGA accepts fully differential, unipolar and bipolar input signal ranges from REFIN1/128 to REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16-bit aux channel does not have a PGA and has an input signal range of REFIN2 or REFIN2/2.

Features

High Resolution Σ-Δ ADCs

  • 2 Independent ADCs (16- and 24-Bit Resolution)
  • Factory-Calibrated (Field Calibration Not Required)
  • Output Settles in 1 Conversion Cycle (Single Conversion Mode)
  • Programmable Gain Front End
  • Simultaneous Sampling and Conversion of 2 Signal Sources
  • Separate Reference Inputs for Each Channel
  • Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate

ISOURCE Select

  • 24-Bit No Missing Codes—Main ADC
  • 13-Bit p-p Resolution @ 20 Hz, 20 mV Range
  • 18-Bit p-p Resolution @ 20 Hz, 2.56 V Range

Interface

  • 3-Wire Serial
  • SPI®, QSPI™, MICROWIRE™, and DSP Compatible
  • Schmitt Trigger on SCLK

Diagrams

AD7719 Diagram
Functional Block Diagram for AD7719

Specifications

Resolution (Bits) 24bit
T-Put Rate 105SPS
# Chan 6
Supply V Multi(+3, +5),Single(+3),Single(+3.3),Single(+5)
Pwr Diss (max) 10mW
Interface Ser,SPI
Ain Range (2Vref) p-p,(2Vref/PGA Gain) p-p,(Vref) p-p
SNR (dB) 126dB
Pkg Type SOIC,SOP

AD7356 - Differential Input, Dual, Simultaneous Sampling, 5 MSPS, 12-Bit, SAR ADC

AD7682 - 16-Bit, 4-Channel, 250 kSPS PulSAR® ADC

AD7401A - Isolated Sigma-Delta Modulator

AD7352 - Differential Input, Dual, Simultaneous Sampling, 3 MSPS, 12-Bit, SAR ADC

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Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7719 24 105SPS 6 10mW
AD7794 24 470SPS 6 2.5mW
AD7714 24 1KSPS 5 7mW
AD7793 24 470SPS 3 2.5mW
AD7713 24 205SPS 3 5.5mW
AD7799 24 470SPS 3 2.5mW
AD7787 24 120SPS 2 800µW
AD7718 24 1.365KSPS 10 8.75mW
AD7791 24 120SPS 1 800µW
AD7797 24 123SPS 1 1.6mW
AD7795 16 470SPS 6 2.5mW
Pricing, Packaging & Availability

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Model
The model number is a specific version of a generic that can be purchased or sampled.

Status
Status indicates the current lifecycle of the product. This can be one of 4 stages:
  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • 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.

Available Ship Date
This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.

RoHS Compliant
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.

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