AD7173-8

Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC

Data Sheet
Rev. B
icon-recommended Recommended for New Designs
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Datasheet
Data Sheet Rev. B
CN Rev. 0 | JP Rev. B
User Guides Rev. A
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IBIS Models
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Circuit Note
CN | JP 2 View All
Evaluation Software Rev. V3.3.2.3
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Alternative Parts

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24-Bit, 250 kSPS Sigma Delta ADC with 20 µs Settling

AD7175-2
AD7175-2

24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers

AD7172-2
AD7172-2

Low Power, 24-Bit, 31.25 kSPS, Sigma-Delta ADC with True Rail-to-Rail Buffers

AD7172-4
AD7172-4

Lower Power and Lower Noise, faster Throughput, true Rail to Rail Buffers. Enhanced feature set.

AD7177-2
AD7177-2

Lower Power and Lower Noise, faster Throughput. Integrated Buffers and precision reference. Enhanced feature set.

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
  • 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

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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

Software & Systems Requirements

Evaluation Software

ZIP
285.72 M

AD717x Eval+ Software (Rev. V3.3.2.3)

Device Drivers

WIKI

AD717x Microcontroller No-OS

Mbed Support

EVAL-AD717x-AD411x Mbed Code
WIKI

AD717x Mbed Example
WIKI

Learn how to get started with Mbed
Mbed is an open source, development environment for ARM microcontrollers.
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More Mbed supported ADI Products

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.

VirtualEval

IBIS Models

Design Tools

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

  • For voltage conversion which can double or invert voltages to help with power supply rail generation: ADM660.
  • For a low noise, high power supply rejection, positive supply voltage LDO: ADP7118.
  • For a low noise, high power supply rejection, negative supply voltage LDO: ADP7182.

Recommended Driver Amplifiers

  • For a single supply, ultralow noise, zero drift, rail to rail input and output amplifier: ADA4528-2.
  • For a high voltage, ultralow noise, zero drift, rail to rail output amplfier: ADA4522-2.

Recommended External Multiplexers

  • For low Ron, 4:1 channel multiplexer: ADG1404.
  • For low Ron with four differential inputs: ADG1409.

Recommended External Voltage References

  • For the family of low noise, low drift and high accuracy references: ADR445, ADR4550.

Reference Materials

Informational (1)

AD717x Family

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.

AD7173-8 Material Declaration
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PCN-PDN Information

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  • AD7173-8BCPZ Production
  • AD7173-8BCPZ-RL Production

Support & Discussions

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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.