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.
Design Tools
ΣΔ ADC Register Configuration Assistant
Easily program the configuration registers for the sigma delta ADCs. Use pu...
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
- Enlarge
- Symbols and Footprints
Functional Block Diagram for AD7719
Low Voltage, Low Power, 16-/24-Bit, Dual Sigma Delta ADC
Functional Block Diagram for AD7719
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
| 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 |
AD7719 Model Options
Help
- 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).
For detailed drawings and chemical composition please consult our Package Site
- 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
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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