Datasheet > AN-7820

AN-7820

更新时间： 2024-09-23 22:05:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		/
页数	文件大小	规格书
17页	208K
描述
EVALUATION BOARD

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中文翻译

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数据手册

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AN-7820 数据手册

AN7820/24

EVALUATION BOARD

APPLICATION NOTE

FEATURES

APPLICATIONS

• 20 and 40 MSPS Conversion Rate

• On-Board Clock Drivers

• Data Output and Strobe Signal

• User Selectable Capture Clock

• On-Board Reference Drivers

• Evaluation of SPT7820 and SPT7824

• Engineering System Prototype Aid

• Incoming Inspection Tool

• Differential Linearity Error (DLE) Testing

• Integral Linearity Error (ILE) Testing

• AC Accuracy Testing: SNR, THD

• Guide for System Layout

GENERAL DESCRIPTION

The SPT7820 is capable of digitizing an analog input signal

into10-bitwordsataminimumupdaterateof20MSPS, while

the SPT7824 is capable of digitizing an analog input signal

into 10-bit words at a minimum update rate of 40 MSPS. Both

devices are pin-compatible. All input/output logic is TTL-

compatible.

The EB7820/24 evaluation board demonstrates the perfor-

mance of the SPT7820 and SPT7824, monolithic high speed

analog-to-digital converters (ADCs). This document can

usedasanapplicationnoteandassupplementalinformation

to the existing data sheets (SPT7820 or SPT7824). Both the

SPT7820 and SPT7824 have analog input ranges of ±2 V.

Figure 1: EB7820/24 Block Diagram. (The full detail schematic is shown in figure 17.)

EB7820/24

REVB

CLK

CCLK

TTL

COMP

DGND

+2.5V

-5.2

DGND

CLK

PART OF DB792

VFT

(DAUGHTER BOARD)

REF

- 1

VFB

VIN

Dout

12-BIT DAC

(80 MSPS MAX)

VIN

DAC

OUT

AGND

-A5.2V

+A5

- D5.2V

+D5V

ADC OUT (TTL)

The EB7820/24 (≈ 4" X 7.5") consists of five separate sections:

- Reference circuits

- Clock circuits

- SPT7820 or SPT7824, 10-bit ADC (not included with the board)

- Output latches available through 26-pin female ribbon connector

- The DB792 DAC reconstruction board is a separate daughter board (≈ 2.5" X 3.0") that directly interfaces with the

EB7820/24

12 3 4 5 6 7...17

中文翻译

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