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AD7176-2:  24-Bit, 250 kSPS Sigma Delta ADC with 20 µs Settling

Product Details

Product Status:Recommended for New Designs

The AD7176-2 is a fast settling, highly accurate, high resolution, multiplexed, 24 bit, Sigma Delta ADC for low bandwidth input signals with a fully flexible ODR (output data rate) between 5SPS and 250kSPS.

The AD7176-2 combines 2 differential or 4 single-ended analog input channels via the integrated crosspoint multiplexer with industry beating power dissipation figures.

For 50 Hz and 60 Hz environments, the AD7176-2 specific filter minimizes the settling times or maximizes the rejection of the line frequency. These enhanced filters enable simultaneous 50 Hz and 60 Hz rejection with a 27 SPS output data rate.

With an ODR of 250ksps the AD7176-2 can boast a RMS noise of 9.7uV when operating on the default Sinc5 + Sinc1 filter.

The AD7176-2 is configured over SPI and comes in a small 24 pin TSSOP package which enables reduced board size.

Integrated precision 2.5V (2 ppm/°C) reference and integrated oscillator adds functionality and reduces external component count.

  • Optional Split supply operation +/-2.5V (AVDD1-AVSS)
  • System offset and gain errors can be corrected on a per channel basis.
  • Boasts Low noise figures across the ODR range
  • Fully SPI, QSPI, Microwire and DSP compatible
  • Sinc5 + Sinc1 filter, Sinc3 filter and enhanced 50Hz and 60Hz rejection digital filter options (see digital filter in FAQ)
  • SPI configuration control
  • 3 or 4 wire digital interface (Schmitt trigger on SCLK)

FEATURES and BENEFITS

  • Fast and flexible Output Rate – 5SPS to 250KSPS
  • Fast Settling Time – 20 μs
  • Channel Scan Data Rate of
    50 kSPS/channel
  • Performance Specifications
    17 noise free bits @ 250 kSPS
    20 noise free bits @ 2.5 kSPS
    22 noise free bits @ 5 SPS
    INL 2.5 ppm of FSR
  • 85dB rejection of 50 Hz and 60 Hz with 50 ms settling
  • User Configurable-Input channels
    2 Full Differential or 4 pseudo Differential
    Crosspoint multiplexer
  • On chip 2.5V reference (drift 2 ppm/°C)
  • See data sheet for additional features

Functional Block Diagram for AD7176-2

New Document Type:

PDF

AD7176-2 Key Sheet (pdf)
A 6-page, concise, clear and downloadble brief on the AD7176-2.

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD7176-2 Digital Filter Frequency Response Model  (xls, 556 kB) Filter Model XLS
AD7176-2 IBIS Model  (ibs) IBIS Models IBS
AD7176-2 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design Device Drivers HTML
AD7176 - Microcontroller No-OS Driver Device Drivers HTML
BeMicro FPGA Project for AD7176-2 with Nios driver Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Companion Products

Suggested Companion Products


Recommended Driver Amplifiers for the AD7176-2
  • For a single supply, low noise, low offset CMOS amplifier, we recommend the AD8656.
  • For a single supply, low noise, low distortion, differential driver, we recommend the ADA4940-1.
  • For a single supply, attenuating input stage, differential driver, we recommend the AD8475.
Recommended External Voltage References for the AD7176-2
  • For the family of low noise, low drift and high accuracy references, we recommend the ADR445 or the ADR4550.
Recommended Digital Isolators for the AD7176-2
  • For SPI Interface, lowest power, 2.5 kVrms isolation, we recommend the ADuM1401.
  • For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation, we recommend the ADuM3401.
  • For SPI Interface, low power, 5.0 kVrms isolation, we recommend the ADuM4401.
  • For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V), we recommend the ADuM3481.

Recommended External Multiplexers for the AD7176-2

  • For low Ron, 4:1 channel multiplexer, we recommend the ADG1404.
  • For low Ron with four differential inputs, we recommend the ADG1409.
  • For additional multiplexer selections, we recommend selecting the product category and filtering on our parametric search tables.
Recommended Power Solutions for the AD7176-2
  • For a low noise positive LDO, For 5V systems we recommend the ADM7160, for 12V systems the ADP7118 and 24V systems the ADP7142.
  • For a low noise negative LDO, for 5V, 12V and 24V systems we recommend the ADP7182.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7176-2 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7176-2BRUZ Status: Production 24 ld TSSOP 24 Ind Tube, 62 $10.97 $10.25 Y  Material Info PCN Purchase Sample
AD7176-2BRUZ-RL Status: Production 24 ld TSSOP 24 Ind Reel, 2500 - $10.25 Y  Material Info PCN Purchase
Price Table Help

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.

AD7176-2 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7176-2SDZ Status: Production Evaluation Board $89.00 Yes -
EVAL-SDP-CB1Z Status: Production Evaluation Controller Board $99.00 Yes -

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.

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