AD7402
Info : RECOMMENDED FOR NEW DESIGNS
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AD7402

16-Bit, Isolated Sigma-Delta Modulator

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 3
1ku List Price Starting From $3.60
Features
  • 10 MHz internal clock rate
  • 16 bits, no missing codes
  • Signal-to-noise ratio (SNR): 87 dB typical
  • Effective number of bits (ENOB): 13.5 bits typical
  • Typical offset drift vs. temperature: 1.7 µV/°C
  • On-board digital isolator
  • On-board reference
  • Full-scale analog input range: ±320 mV
  • −40°C to +105°C operating range
  • High common-mode transient immunity: >25 kV/µs
  • 8-lead, wide-body SOIC, with increased creepage package
  • Slew rate limited output for low electromagnetic interference (EMI)
Additional Details
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The AD74021 is a high performance, second-order, Σ-Δ modulator that converts an analog input signal into a high speed, single-bit data stream, with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The AD7402 operates from a 4.5 V to 5.5 V (VDD1) power supply and accepts a differential input signal of ±250 mV (±320 mV full scale). The differential input is ideally suited to shunt voltage monitoring in high voltage applications where galvanic isolation is required.

The analog input is continuously sampled by a high performance analog modulator, and converted to a ones density, digital output stream with a data rate of 10 MHz. The original information can be reconstructed with an appropriate digital filter to achieve 87 dB signal to noise ratio (SNR) at 39 kSPS. The serial input/output can use a 3 V to 5.5 V or a 3.3 V supply (VDD2).

The serial interface is digitally isolated. High speed complementary metal oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices. The AD7402 device is offered in an 8-lead, wide body SOIC package and has an operating temperature range of −40°C to +105°C.

Safety and regulatory approvals

  • UL recognition
    • 5000 V rms for 1 minute per UL 1577
  • CSA Component Acceptance Notice 5A
  • VDE Certificate of Conformity
    • DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
    • VIORM = 1250 VPEAK

Applications

  • Shunt current monitoring
  • AC motor controls
  • Power and solar inverters
  • Wind turbine inverters
  • Data acquisition systems
  • Analog-to-digital and opto-isolator replacements

1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.

Part Models 3
1ku List Price Starting From $3.60

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD7402-8BRIZ
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  • HTML
AD7402-8BRIZ-RL
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AD7402-8BRIZ-RL7
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Software and Part Ecosystem

Software and Part Ecosystem

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Evaluation Kit

Evaluation Kits 2

EVAL-AD7402

Evaluation board for evaluating AD7402 16-Bit, Isolated Sigma-Delta Modulator

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EVAL-AD7402

Evaluation board for evaluating AD7402 16-Bit, Isolated Sigma-Delta Modulator

Evaluation board for evaluating AD7402 16-Bit, Isolated Sigma-Delta Modulator

Features and Benefits

  • Full featured evaluation board for the AD7403 
  • On-board power supplies 
  • Standalone capability
  • System demonstration platform (SDP-H1) compatible (EVAL-SDP-CH1Z) 
  • PC software for control and data analysis (CD with software included in evaluation kit)

Product Detail

The EVAL-AD7402-8FMCZ is a full featured evaluation board designed to allow the user to easily evaluate all features of the AD7402 isolated analog-to-digital converter (ADC). The evaluation board can be controlled by the EVAL-SDP-CH1Z via FMCZ connector (J9). The SDP-H1 board (EVAL-SDP-CH1Z) allows the evaluation board to be controlled through a USB port of a PC using the evaluation board software available for download from the product page or from the included installer CD.

On-board components include the following:

ADuM6000: isolated iCoupler® 5kV, DC / DC converter
ADP2441: 36 V, 1A, synchronous, step down DC-DC regulator
ADP7104ARDZ-5.0: 5 V low noise LDO


Evaluation Kit Contents

  • Evaluation board
  • CD containing evaluation board software installation
Additional Equipment Required
  • EVAL-SDP-CH1Z (must be ordered separately) includes a USB cable and 12v wall wart.
  • Signal source
  • PC running Windows XP SP3, Windows Vista, or Windows 7 with USB 2.0 port
reference details image

FMCMOTCON2

OBSOLETE: AD-FMCMOTCON2-EBZ Evaluation Board

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FMCMOTCON2

OBSOLETE: AD-FMCMOTCON2-EBZ Evaluation Board

OBSOLETE: AD-FMCMOTCON2-EBZ Evaluation Board

Features and Benefits

This evaluation board is obsolete and no longer recommended.


The FMCMOTCON2 evaluation kit enables users to:

  • Model and implement motor control algorithms rapidly for high performance servo systems, incorporating system modelling and design concepts using Mathworks model based design
  • Reduce time needed to move a motor control system from concept to production, by providing a prototyping system to verify the hardware and control algorithms before moving to production stage.

Product Detail

This evaluation board is obsolete and no longer recommended.


The AD-FMCMOTCON2-EBZ is a complete high performance servo system on an FPGA Mezzanine Card (FMC) board, the purpose of which is to provide a complete motor drive system demonstrating efficient and high dynamic control of three phase PMSM and induction motors up to 48V and 20A.

Two motors can be driven at the same time, each motor having its separate power supply. The system incorporates high quality power sources; reliable power, control, and feedback signals isolation; accurate measurement of motor current & voltage signals; high speed interfaces for control signals to allow fast controller response; industrial Ethernet high speed interfaces; single ended Hall, differential Hall, encoder and resolver interfaces; digital position sensors interface; flexible control with a FPGA/SoC interface.

The kit consists of two boards: a controller board and a drive board. An optional AD-DYNO2-EBZ dynamometer can also be purchased through Avnet and is intended to be an extension of the drive system.

Controller Board

  • Digital board for interfacing with the low and high voltage drive boards
  • Compatible with all Xilinx FPGA platforms with FMC LPC or HPC connectors
  • FMC signals voltage adaptation interface for seamless operation on all FMC voltage levels
  • Fully isolated digital control and feedback signals
  • Isolated Xilinx XADC interface
  • 2 x Gbit Ethernet PHYs for high speed industrial communication, with 3rd party EtherCAT support
  • Single ended Hall, Differential Hall, Encoder, Resolver interfaces
  • Digital sensors interfaces
    • EnDat
    • BISS Interface

Drive Board

  • Drives motors up to 48V @ 20A
  • Drives 2 motors simultaneously
  • High frequency drive stage implemented with ADI isolated gate drivers
  • Supported motor types
    BLDC
    PMSM
    Brushed DC
    Stepper (bipolar / unipolar)
  • Integrated over current protection
  • Reverse voltage protection
  • Current and Voltage measurement using isolated ADCs
  • BEMF zero cross detection for sensorless control of PMSM or BLDC motors
  • Separate voltage supplies for the 2 motors so that the motors don't influence each other

Dynamometer System with Embedded Control

  • Two BLDC motors connected by a rigid couple in a dyno setup, which can be used to test real-time motor control performance.
  • One BLDC motor acts as an electronically adjustable load and is driven by the embedded control system. This motor can be directly connected to the FMC motor drive to get complex / active loads. The load can be driven also by the AD-FMCMOTCON2-EBZ to implement dynamic load profiles.
  • The other BLDC motor is driven by the FMC motor drive.
  • Measurement and display of load motor current
  • Measurement and display of load motor speed
  • External control using Analog Discovery and MathWorks Instrumentation Control Toolbox

Software:

Example reference designs showing how to use the platform with Xilinx® FPGAs or SoCs and high performance control algorithms from Mathworks® are provided together with the hardware. Information on the FMC board, and how to use it, the design package that surrounds it, and the software which can make it work, can be found by clicking the software link.

Tools & Simulations

Tools & Simulations 1

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