AD7173-8
Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC
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Overview
Features and Benefits
- Low power, 8-/16-channel, highly integrated multiplexed analog-to-digital converter (ADC)
- Integration
- Precision analog input buffers and reference input buffers
- 2.5 V precision reference (3.5 ppm/°C)
- Cross point multiplexer (enable system diagnostic)
- 8 full differential or 16 single-ended channels
- Clock oscillator
- GPIO and GPO pins with automatic external mux control
- Fast and flexible output rate: 1.25 SPS to 31.25 kSPS
- Channel scan data rate: 6.21 kSPS/channel (161 μs settling)
- Performance specifications
- 17.5 noise free bits at 31.25 kSPS
- 24 noise free bits at 1.25 SPS
- INL: ±3 ppm/FSR
- 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling
- Operates with either 3.3 V or 5 V supply
- Single supply
- 3.3 V or 5 V AVDD1, 2 V to 5 V AVDD2, and 2 V to 5 V IOVDD
- Optional split supply
- AVDD1 and AVSS ± 2.5 V or AVDD1 and AVSS ± 1.65 V
- Current: 1.4 mA
- Single supply
- 3-/4-wire serial digital interface (Schmitt trigger on SCLK)
- CRC error checking
- SPI, QSPI, MICROWIRE, and DSP compatible
- Package: 40-lead 6 mm × 6 mm LFCSP
- Temperature range: −40°C to +105°C
Product Details
Fast settling, highly accurate, low power, 8-/16-channel, multiplexed ADC for low bandwidth input signals with integrated input buffers.
Integrated precision, 2.5 V, low drift (3.5 ppm/°C), band gap reference and integrated oscillator.
Eight flexible setups with configurability for output data rate, digital filter mode, offset/gain error correction, reference selection, buffer enables and more. This per channel configurability extends to the output data rate used for each channel when using sinc5 + sinc1 filter.
Sinc5 + sinc1 filter maximizes channel scan rate, and sinc3 filter maximizes resolution and enhanced 50 Hz/60 Hz rejection, with four selectable options to maximize rejection.
Integrated diagnostic features, including CRC, register checksum, temperature sensor, crosspoint multiplexer, burnout currents, and GPIOs/GPOs.
Applications
- Process control: PLC/DCS modules
- Voltage, current, temperature, and pressure measurement
- Flow meters
- Medical and scientific multichannel instrumentation
- Seismic instrumentation
- Chemical analysis instrumentation: chromatography
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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The Data Conversion Handbook, 20051/2/2005
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MT-023: ADC Architectures IV: Sigma-Delta ADC Advanced Concepts and Applications2/14/2015PDF936 kB
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MT-022: ADC Architectures III: Sigma-Delta ADC Basics2/14/2015PDF289 kB
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AD717x Family2/25/2016
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Digital Filters Sinc3 V's Sinc4 Differences and Trade Offs11/28/2018 -
Precision Sigma Delta Filtering Tutorial10/15/2018 -
Virtual Evaluation (VE) Tutorial10/15/2018 -
AD7175 Family Precision Sigma Delta ADCs (w/o audio)10/15/2018
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Moving Up the Stack Challenges for Measurement Engineering at ADI4/6/2018 Analog Dialogue
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Fundamental Principles Behind the Sigma-Delta ADC Topology: Part 22/1/2016
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Power Efficient Battery Formation/Testing System with Energy Recycling5/1/2015
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Flexible Bandwidth 4 mA to 20 mA Current Input with Easy HART Compatibility4/1/2015
Software & Systems Requirements
Evaluation Software
Device Drivers
Mbed Support
EVAL-AD717x-AD411x-IIO Code
IIO firmware for the AD717x and AD411x family of devices.
WIKI
AD717x/411x Mbed IIO Application
This page gives an overview of using the ARM “Mbed” platform supported firmware example with Analog Devices AD717x/AD411x Evaluation boards and SDP-K1 controller board.
WIKI
Learn how to get started with Mbed
Mbed is an open source, development environment for ARM microcontrollers.
Tools & Simulations
Virtual Eval - BETA
Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.
IBIS Models
IBS
AD7173-8 IBIS Model
514.13 K
Design Tools
XLSX
AD7173-8 Filter Model
324 kB
Reference Designs (2)
Product Recommendations
AD7173-8 Companion Parts
Recommended Digital Isolators
- For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V): ADUM3481.
- For SPI Interface, low power, 5.0 kVrms isolation: ADUM4401.
- For SPI Interface, lowest power, 2.5 kVrms isolation: ADUM1401.
- For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation: ADUM3401.
Recommended Power Solutions
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.
PCN-PDN Information
Sample & Buy
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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.