Analog Devices: EVAL-AD7678EDZ Evaluation Kit for AD7678 PulSAR A/D Converter

atomar — Wed, 25 Jun 2014 00:52:56 GMT

Current Revision posted to Documents by atomar on 6/25/2014 12:52:56 AM

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Kit Overview

The Analog Devices EVAL-AD7678EDZEVAL-AD7678EDZ is a fully featured evaluation Kit for the AD7678AD7678. This board operates in stand alone mode or in conjunction with the Converter Evaluation and Development board, EVAL-CED1ZEVAL-CED1Z. When operated with the Converter Evaluation and Development board, software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the Converter Evaluation and Development board.

The EVAL-AD7678EDZEVAL-AD7678EDZ is an evaluation board for the 48 lead AD7678AD7678 18- bit PulSAR® analog to digital converter (ADC) family. These low power, successive approximation register (SAR) architecture ADCs offer very high performance with 100kSPS to 3MSPS throughput rate range with a flexible parallel or serial interface. The evaluation board is designed to demonstrate the ADC's performance and to provide an easy to understand interface for a variety of system applications.

The evaluation board is ideal for use with Analog Devices USB based Converter and Evaluation Development EVAL-CED1ZEVAL-CED1Z, (CED) or as a stand-alone system. Since many newer PC’s do not offer a parallel port along with overcomplicated BIOS port settings, the CED board is strongly recommended.

The design offers the flexibility of applying external control signals and is capable of generating conversion results on parallel 18-bit wide buffered outputs. On-board components include a high precision band gap reference, reference buffers, a signal conditioning circuit with two op-amps and digital logic. The EVAL-AD7678EDZEVAL-AD7678EDZ interfaces to the CED capture board with a 96-pin DIN connector. A 40-pin IDC connector is used for parallel output, and test points are provided for the serial port. SMB connectors are provided for the low noise analog signal source, and for an externally generated CNVST (convert start input).

The AD7678AD7678 is an 18-bit, 100 kSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates on a single 5 V power supply. The part contains a high speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports.

Key Applications: CT scanners, High dynamic data acquisition, Geophone and hydrophone sensors, Σ-Δ replacement (low power, multichannel), Instrumentation, Spectrum analysis Medical instruments

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Technical Documents

Learning Center

Type	Description
User Guide	ADI: User Guide for EVAL-AD76XXEDZ - Evaluation Board For PulSAR 48 Lead ADCs
Datasheet	ADI: Data Sheet for AD7678 - 18-Bit, 2.5 LSB INL, 100 kSPS SAR ADC
Product Brief	ADI: Product Brief for High Speed, High Accuracy, 14-Bit, 16-Bit, and 18-Bit PulSAR ADCs
Product Brief	ADI: Product Brief for 8-Bit to 18-Bit SAR ADCs
Application Note	ADI: AN-931 -Application Note for Understanding PulSAR ADC Support Circuitry
Application Note	ADI: AN-932 -Application Note for Power Supply Sequencing

Design Elements

Type	Description
CAD Model	ADI: CAD Model for AD7678ACPZ ,AD7678ACPZRL
CAD Model	ADI: CAD Model for AD7678ASTZ,AD7678ASTZRL

Video

Kit Features

Key Features for EVAL-AD7678EDZEVAL-AD7678EDZ Evaluation Board:

Converter and Evaluation Development (EVAL-CED1ZEVAL-CED1Z)
compatibility
Versatile analog signal conditioning circuitry
On-board reference, clock oscillator and buffers
Buffered 18 bit parallel outputs
Buffered serial port interface
Ideal for DSP and data acquisition card interfaces
Analog and digital prototyping area
PC software for control and data analysis

Key Features for AD7678AD7678:

18-bit resolution with no missing codes
No pipeline delay (SAR architecture)
Differential input range: ±VREF (VREF up to 5 V) Throughput: 100 kSPS
INL: ±2.5 LSB max (±9.5 ppm of full scale) Dynamic range: 103 dB typ (VREF = 5 V) S/(N+D): 100 dB typ @ 2 kHz (VREF = 5 V) Parallel (18-,16-, or 8-bit bus) and serial 5 V/3 V interface
SPI®/QSPI™/MICROWIRE™/DSP compatible
On-board reference buffer
Single 5 V supply operation
Power dissipation: 18 mW @ 100 kSPS
180 μW @ 1 kSPS
48-lead LQFP or 48-lead LFCSP package
Pin-to-pin compatible upgrade of AD7674/AD7676/AD7679

Kit Contents

The Analog Devices EVAL-AD7678EDZEVAL-AD7678EDZ Evaluation Kit is supplied with below contents:

Evaluation Board

Tags: eval-ad7678edz, ad7678, analog_devices