Analog Devices: EVAL-AD7176-2SDZ Evaluation Board for the AD7176-2 Sigma-Delta ADC

Kit Overview   The Analog Devices EVAL-AD7176-2SDZEVAL-AD7176-2SDZ evaluation kit features the AD7176-2AD7176-2 24-bit, 250 kSPS analog-to-digital converter (ADC). A 7 V to 9 V external bench top supply is regulated to 5 V and 3.3 V to supply the AD7176-2 and support all necessary components. The EVAL-AD7176-2SDZ board connects to the USB port of the PC by connection to the EVAL-SDP-CB1ZEVAL-SDP-CB1Z motherboard.   The EVAL-AD7176-2SDZEVAL-AD7176-2SDZ software fully configures the AD7176-2 device register functionality and provides dc time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.   The EVAL-AD7176-2SDZEVAL-AD7176-2SDZ is an evaluation board that is designed to allow the user to evaluate the features of the ADC. The user PC software executable controls the AD7176-2 over the USB through the SDP-B system demonstration platform board (EVAL-SDP-CB1ZEVAL-SDP-CB1Z).   The AD7176-2AD7176-2 is a low noise, fast settling, multiplexed, 2-/4-channel (fully differential/pseudo differential) Σ-Δ ADC. The AD7176-2 has a maximum channel-to-channel scan rate of 50 kSPS (20 μs) for fully settled data. The output data rates range from 5 Hz to 250 kHz.   Key Applications: Process control: PLC/DCS modules, Temperature and pressure measurement, Medical and scientific multichannel instrumentation, Chromatography

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Software Development Tools:

AD7176-2 Evaluation Software

The evaluation kit for the AD7176-2 includes self-installing software on the CD. The software is compatible with Windows XP, Windows Vista (32-bit), and Windows 7 (32-bit and 64-bit). The software must be installed before connecting the SDP board to the USB port of the PC to ensure that the SDP board is recognized when it connects to the PC. T he software allows to evaluate the performance of the AD7176-2 ADC and show data graph for the ADC output.

Hardware Development Tools:

SDP-B Controller Board

The SDP-B is a controller board for the System Demonstration Platform (SDP). The SDP-B is based on the Blackfin ADSP-BF527 processor with connectivity to the PC through a USB 2.0 high speed port. Controller boards allow for the configuration and capture of data on daughter boards from the PC via USB.The SDP-B (EVAL-SDP-CB1ZEVAL-SDP-CB1Z) is the required controller board for this evaluation system.Evaluation boards requiring the SDP-B will not work with the SDP-S controller board.

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Kit Features

Key Features for the EVAL-AD7176-2SDZEVAL-AD7176-2SDZ Evaluation Board are as below:

• Full featured evaluation board for the AD7176-2
• PC control in conjunction with the system demonstration platform (EVAL-SDP-CB1Z)
• PC software for control and data analysis (time domain)
• Standalone capability

Key Features for AD7176-2AD7176-2 are as below:

• Fast and flexible output rate - 5 SPS to 250 kSPS
• Fast settling time - 20 μs
• Channel scan data rate of 50 kSPS/channel
• Performance specifications
  • 17 noise free bits at 250 kSPS, 20 noise free bits at 2.5 kSPS, 22 noise free bits at 5 SPS, INL ±2.5 ppm of FSR
• 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling
• User-configurable input channels
  • 2 fully differential or 4 pseudo differential
  • Crosspoint multiplexer
• On-chip 2.5 V reference (drift 2 ppm/°C)
• Internal oscillator, external crystal, or external clock
• Power supply
  • Single supply: 5 V AVDD1, 2 V to 5 V AVDD2 and IOVDD
  • Optional split supply: AVDD1 and AVSS ± 2.5 V
• Current: 7.8 mA
• 3- or 4-wire serial digital interface (Schmitt trigger on SCLK)
  • CRC error checking
  • SPI, QSPI, MICROWIRE, and DSP compatible

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Kit Contents

The Analog Devices EVAL-AD7176-2SDZEVAL-AD7176-2SDZ Evaluation Kit is supplied with below contents:

• EVAL-AD7176-2SDZ evaluation board
• Evaluation software CD for the AD7176-2AD7176-2

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