AD7799
3-Channel, Low Noise, Low Power, 24-Bit, Sigma Delta ADC with On-Chip In-Amp
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Alternative Parts
AD7124-4
Lower power and lower noise, completed signal chain integration with diagnostic features for functional safety, easier evaluation and reduced design time
Overview
Features and Benefits
- RMS noise:
27 nV at 4.17 Hz (AD7799)
65 nV at 16.7 Hz (AD7799)
40 nV at 4.17 Hz (AD7798)
85 nV at 16.7 Hz (AD7798) - Current: 380 μA typical
- Power-down: 1 μA maximum
- Low noise, programmable gain, instrumentation amp
- Update rate: 4.17 Hz to 470 Hz 3 differential inputs
- Internal clock oscillator
- Simultaneous 50 Hz/60 Hz rejection
- Reference detect
- Low-side power switch
- Programmable digital outputs
- Burnout currents
- Power supply: 2.7 V to 5.25 V
Product Details
The AD7798/AD7799 are low power, low noise, complete analog front ends for high precision measurement applications. The AD7798/AD7799 contains a low noise, 16-/24-bit Σ-Δ ADC with three differential analog inputs. The on-chip, low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC. With a gain setting of 64, the rms noise is 27 nV for the AD7799 and 40 nV for the AD7798 when the update rate equals 4.17 Hz.
On-chip features include a low-side power switch, reference detect, programmable digital output pins, burnout currents, and an internal clock oscillator. The output data rate from the part is software-programmable and can be varied from 4.17 Hz to 470 Hz.
The part operates with a power supply from 2.7 V to 5.25 V. The AD7798 consumes a current of 300 μA typical, whereas the AD7799 consumes 380 μA typical. Both devices are housed in a 16-lead TSSOP package.
Applications
- Weigh scales
- Pressure measurement
- Strain gauge transducers
- Gas analysis
- Industrial process control
- Instrumentation
- Portable instrumentation
- Blood analysis
- Smart transmitters
- Liquid/gas chromotography 6-digit DVM
Product Lifecycle
Production
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.
Evaluation Kits (1)
Documentation & Resources
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AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev. B)2/14/2015
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AN-389: Using Sigma-Delta Converters-Part 22/14/2015
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AN-388: Using Sigma-Delta Converters-Part 12/14/2015
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AN-347: Shielding and Guarding2/14/2015
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AN-968: Current Sources: Options and Circuits (Rev. 0)10/22/2008
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AN-311: How to Reliably Protect CMOS Circuits Against Power Supply Overvoltaging3/8/2008
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AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC (Rev. E)10/12/2006
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AN-615: Peak-to-Peak Resolution Versus Effective Resolution (Rev. 0)12/21/2004
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AN-101: Cross Plot Generator Allows Quick A/D Converter Evaluation12/12/2002
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AN-397: Electrically Induced Damage to Standard Linear Integrated Circuits:11/18/2002
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AN-283: Sigma-Delta ADCs and DACs9/24/2002
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FAQs7/26/2017
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Precision Signal-Processing and Data-Conversion ICs for PLCs Now Have More Performance at Less Power, Size, and Cost8/1/2006 Analog Dialogue
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A Reference Design for High-Performance, Low-Cost Weigh Scales12/1/2005 Analog Dialogue
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Which ADC Architecture Is Right for Your Application?6/1/2005 Analog Dialogue
Software & Systems Requirements
Device Drivers
Tools & Simulations
Design Tool
Sigma-Delta ADC Tutorial
An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.
Product Recommendations
AD7799 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD7799BRUZ | Material Declaration | Reliability Data | 16-Lead TSSOP | |
| AD7799BRUZ-REEL | Material Declaration | Reliability Data | 16-Lead TSSOP | |
| Wafer Fabrication Data |
PCN-PDN Information
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Support & Discussions
AD7799 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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Evaluation Boards
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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.