National Semiconductor ADC10040 User Manual Download Page 2

Page: 2 / 11

http://www.national.com

Table of Contents

1.0 Introduction

............................................................................................................................................ 3

2.0 Quick Start

............................................................................................................................................. 3

3.0 Functional Description

............................................................................................................................. 3

3.1 The Signal Input

....................................................................................................................... 3

3.2 Digital Data Output.

.................................................................................................................. 3

3.3 ADC10080 Control Pins.

........................................................................................................... 3

3.3.1

The Standby (STBY) Pin

..................................................................................... 3

3.3.2

The Data Format (DF) pin

.................................................................................... 3

3.3.3 The Input Range Select (IRS) Pin

............................................................................... 4

3.3.4 Power Supply Connections

........................................................................................................... 4

4.0 Obtaining Best Results

............................................................................................................................. 4

4.1 Clock Timing

........................................................................................................................... 4

4.2 Coherent Sampling

.................................................................................................................... 4

4.3 FFT Windowing Technique

....................................................................................................... 4

5.0 Hardware Documentation

............................................................................................................... 6

Summary of Contents for ADC10040

Page 1: ... May 9 2005 Rev 1 3 Evaluation Board User s Guide ADC10040 10 Bit 40 MSPS 3 Volt 55 5 mW A D Converter ADC10065 10 Bit 65 MSPS 3 Volt 68 5 mW A D Converter ADC10080 10 Bit 80 MSPS 3 Volt 78 6 mW A D Converter 2005 National Semiconductor Corporation ...

Page 2: ...Input 3 3 2 Digital Data Output 3 3 3 ADC10080 Control Pins 3 3 3 1 The Standby STBY Pin 3 3 3 2 The Data Format DF pin 3 3 3 3 The Input Range Select IRS Pin 4 3 3 4 Power Supply Connections 4 4 0 Obtaining Best Results 4 4 1 Clock Timing 4 4 2 Coherent Sampling 4 4 3 FFT Windowing Technique 4 5 0 Hardware Documentation 6 ...

Page 3: ...aveVision tm software can be obtained from http www national com 2 Select the input voltage range by inserting a jumper into JP1 Set the jumper on pins 1 2 for 2 0 Vpp Set the jumper on pins 2 3 for 1 5 Vpp If no jumper is inserted 1 0 Vpp is assumed 3 To make the ADC10080 active insure there is no jumper on JP3 4 Select pins 2 3 on JP2 so that the output data is offset binary 5 Connect a clean po...

Page 4: ...oducing inconsistent results when performing repeated testing The presence of these artifacts means that the ADC under test may perform better than the measurements would indicate We can eliminate the need for windowing and get more consistent results if we observe the proper ratios between the input and sampling frequencies This greatly increases the spectral resolution of the FFT allowing us to ...

Page 5: ...the input frequency This spreading is called leakage Figure 5 A discontinuity in the folded finite time waveform leads to misleading results in the FFT There are many windowing techniques in use today to minimize this problem Figure 6 shows an FFT plot of the same data used in Figure 5 but using the Hanning windowing function Note the improved dynamic performance over no windowing as in Figure 5 T...

Page 6: ...6 http www national com 5 0 Hardware Documentation Please see the attached pages for a board layout hardware schematic and Bill of Materials ...

Page 7: ...7 http www national com ...

Page 8: ...7 1 C27 0 1uF 8 2 JP1 JP2 HEADER 3 9 1 JP3 HEADER 2 10 1 JP4 Logic Analyzer 11 1 JS1 CONN TRBLK 4 12 1 J1 Vert PCB mount 13 1 J2 FUTUREBUS_96 14 4 L1 L2 L3 L4 EXC CET103U 15 4 R1 R5 24 9 16 1 R4 49 9 17 1 R6 100K 18 11 R7 R8 R9 R10 R11 R12 R13 49 9 R14 R15 R16 R17 19 1 TP1 CLOCK 20 1 TP2 VIN 21 1 TP3 VCOM 22 1 TP4 VIN 23 1 TP5 VIN 24 1 TP6 VDDA 25 2 TP7 TP8 GND 26 1 TP9 VDDIO 27 1 TP10 VCC_Bfr 28 ...

Page 9: ...SIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which a are intended for surgical implant into the body or b support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user 2 A critical...

Page 10: ...for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge and agre...

Page 11: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments ADC10080EVAL ...

Search results

Summary of Contents for ADC10040

Reviews:

Related manuals for ADC10040

Brands by name

Popular brands

National Semiconductor ADC10040, User Manual

Search results

Summary of Contents for ADC10040

Reviews:

Related manuals for ADC10040

Brands by name

Popular brands