Table of Contents
Advertisement
Quick Links
August 2005
National Semiconductor
Rev -
Evaluation Board User's Guide
12-, 10- and 8-Bit General Purpose
Analog-to-Digital Converters with Input Multiplexer
ADC122S101 / ADC102S101 / ADC082S101
ADC122S051 / ADC102S051 / ADC082S051
ADC122S021 / ADC102S021 / ADC082S021
ADC124S101 / ADC104S101 / ADC084S101
ADC124S051 / ADC104S051 / ADC084S051
ADC124S021 / ADC104S021 / ADC084S021
© 2005 National Semiconductor Corporation.
http://www.national.com
1
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for National Semiconductor ADC122S101
Summary of Contents for National Semiconductor ADC122S101
- Page 1 Rev - Evaluation Board User's Guide 12-, 10- and 8-Bit General Purpose Analog-to-Digital Converters with Input Multiplexer ADC122S101 / ADC102S101 / ADC082S101 ADC122S051 / ADC102S051 / ADC082S051 ADC122S021 / ADC102S021 / ADC082S021 ADC124S101 / ADC104S101 / ADC084S101 ADC124S051 / ADC104S051 / ADC084S051 ADC124S021 / ADC104S021 / ADC084S021 ©...
-
Page 2: Table Of Contents
Table of Contents 1.0 Introduction..........................3 2.0 Board Assembly ........................3 3.0 Quick Start..........................3 4.0 Functional Description......................4 4.1 Input (signal conditioning) circuitry ................4 4.2 The ADC reference ....................4 4.3 ADC clock circuit .......................4 4.5 Digital Data Output....................4 4.6 Power Supply Connections ..................4 4.7 Power Requirements....................5 4.8 Analog Inputs ......................5 5.0 Installing and Using the ADCxx1S101 Evaluation Board ............5... -
Page 3: Introduction
X11C reported, check to be sure the clock signal has ADC104S021 X20C adequate amplitude and repeat the previous step. ADC122S101 X24C 11. Click "Accept" then gather data by pressing F1 on ADC122S051 X06C the keyboard. Perform an FFT on the data by... -
Page 4: Functional Description
BNC2 TPG3 CLK INPUT BNC2 BNC2 Clock INPUT 2 BNC3 INPUT 2 Select BNC3 Connection National Semiconductor G/P ADC, MSOP, Evaluation Board Rev. 1.1 BNC3 Ext. Clock INPUT 2 Connection Input 1 Chan Clock AC/DC Couple Select Select Figure 1. Major Components and Test Points of the Evaluation Board 4.0 Functional Description... -
Page 5: Digital Data Output
4.5 Digital Data Output. input to the evaluation board when evaluating sinusoidal signals to be sure there are no unwanted frequencies The digital output data from the DUT is available at (harmonics and noise) presented to the ADC. It is Header LA1 for connection to a logic analyzer. -
Page 6: Quick Check Of Software And Computer Interface Operation
This completes the testing of the analog portion of the cleanly "wrap around" itself, providing coherent sampling. evaluation board. This eliminates the distortion that would otherwise be present in an FFT and greatly increases its spectral 5.2.3 Quick Check of Software and Computer resolution. -
Page 7: Evaluation Board Specifications
• Check to see that the DUT input signal does not go below ground or above the DUT analog supply voltage. • Be sure that a minimum of +2.7V is at pin 1 of TP1. • Be sure that only one clock source (oscillator at Y1 or signal at BNC3) is active on the board. -
Page 8: Hardware Schematic
7.0 Hardware Schematic http://www.national.com... - Page 9 R16, R19 51, 5%, 1/8 W Size 0603 TP1, TP2, TP3, TP4, TP5 ,TP6, TP7, TP8, Breakable Header DigiKey # S1012-36-ND TPG1, TPG2, TPG3, TPG4 LM4041DIZ-1.2 National Semiconductor not used ADCxx2Sxx1 National Semiconductor ADCxx4Sxx1 National Semiconductor 24C02/SO8 Various 4 MHz OSC fo 50 ksps...
-
Page 10: A1 Summary Tables Of Test Points And Connectors
APPENDIX A1 Summary Tables of Test Points and Connectors P1 Connector - Power Supply Connections Iput Voltage Function P1-1 +5.5V to +5.7V Positive Power Supply P1-2 Power Supply Ground LA1 - Logic Analyzer Header Function Ground ADC Serial Data Output ADC Chip Select (active low) ADC serial Clock ADC Serial Data Input... - Page 11 JP4 - Input 2 Channel Select Jumper Function none Input 2 NOT connected to DUT 1 - 2 Input 2 connected to IN1 3 - 4 Input 2 connected to IN2 5 - 6 Input 2 connected to IN3 (ADCxx4Sxx1 only) 7 - 8 Input 2 connected to IN4 (ADCxx4Sxx1 only) JP5 - Clock Enable...
- Page 12 National Semiconductor Corporation National Semiconductor Europe National Semiconductor National Semiconductor Americas...
- Page 13 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
Need help?
Do you have a question about the ADC122S101 and is the answer not in the manual?
Questions and answers