National Semiconductor DAC121C085 User Manual Download Page 14

 

              14

 

          http://www.national.com 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BY USING THIS PRODUCT, YOU ARE AGREEING TO BE BOUND BY THE TERMS AND CONDITIONS OF NATIONAL 
SEMICONDUCTOR'S END USER LICENSE AGREEMENT. DO NOT USE THIS PRODUCT UNTIL YOU HAVE READ AND 
AGREED TO THE TERMS AND CONDITIONS OF THAT AGREEMENT. IF YOU DO NOT AGREE WITH THEM, CONTACT THE 
VENDOR WITHIN TEN (10) DAYS OF RECEIPT FOR INSTRUCTIONS ON RETURN OF THE UNUSED PRODUCT FOR A 
REFUND OF THE PURCHASE PRICE PAID, IF ANY. 

 

 

 

The DAC121C08XEB, DAC101C08XEB, & DAC081C08XEB Evaluation Boards are intended for product evaluation purposes only 
and are not intended for resale to end consumers, are not authorized for such use and are not designed for compliance with 
European EMC Directive 89/336/EEC, or for compliance with any other electromagnetic compatibility requirements. 

National Semiconductor Corporation does not assume any responsibility for use of any circuitry or software supplied or described. 
No circuit patent licenses are implied. 

LIFE SUPPORT POLICY 

NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR 
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT 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 component is any component in a life support 

device or system whose failure to perform can be 
reasonably expected to cause the failure of the life 
support device or system, or to affect its safety or 
effectiveness. 

 

National Semiconductor Corporation

 

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Fax:  81-3-5639-7507 

www.national.com 

 

National does not assume any responsibility for any circuitry described, no circuit patent licenses are implied and National reserves the right at any time 
without notice to change said circuitry and specifications. 

Summary of Contents for DAC121C085

Page 1: ...9 2007 Rev 1 0 CMC Evaluation Board User s Guide DAC121C08XEB DAC101C08XEB DAC081C08XEB Micro Power Digital to Analog Converter DAC with an I2 C Compatible Interface 12 bit 10 bit 8 bit DAC121C085 DAC...

Page 2: ...ctional Description 6 4 1 Jumper Settings 6 4 2 I2 C Interface 6 4 3 DAC Reference Circuitry 6 4 4 Analog Output 7 4 5 Power Supply Connections 7 5 0 Software Operation and Settings 8 6 0 Evaluation B...

Page 3: ...ignal analyzer can be used with the board to evaluate the DAC121C085 performance In the Computer mode data capture and evaluation is simplified by connecting this board to National Semiconductor s Dat...

Page 4: ...o the timing diagrams in the datasheet for further timing details The DAC supports any of the three standard I 2 C speed ranges Ensure the I 2 C master device is configured to drive 5V CMOS logic 5 Co...

Page 5: ...aluation board to the WV4 serial connector J7 on the WV4 board Refer to Figure 3 for the serial connection and Figure 4 for the J1 header pin out Note J1 on the DAC121C08XEB is intentionally stuffed o...

Page 6: ...which can be increased to interface to a noisy I 2 C bus In Computer Mode the I 2 C interface is driven by the WaveVision4 board The WaveVision4 software allows the user to drive the DAC121C085 with v...

Page 7: ...e DAC board To set VREF VA simply short pins 2 3 of JP7 For WaveVision to recognize the board the 3P3V supply must be enabled as well Do this by placing a jumper across pins 1 and 2 of JP10 The board...

Page 8: ...stem Settings Dialog 5 Navigate to the DAC121C08XEB Evaluation Board window 6 Configure the I 2 C Interface speed as seen in Figure 7 Standard mode Fast Mode and High Speed mode are supported Figure 7...

Page 9: ...Waveform is plotted in the main WaveVision window for added convienience This waveform may be further analyzed by clicking on the magnifying glass icon then clicking and dragging across a specific are...

Page 10: ...A0 1 A1 2 SCL 3 SDA 4 VREF 7 VOUT 8 VA 6 GND 5 U1 DAC121C085 C2 0 1uF 1 2 3 4 5 6 7 JP5 ADDRESS SELECT 1 TP7 AGND 1 TP5 AGND 1 2 3 J2 VIN C1 200pF D2 RED LED 2 4 6 8 10 1 3 5 7 9 11 12 13 14 J3 WV4 R1...

Page 11: ...D VREF 1 JP8 hdr1x2 Digikey S1011E 36 ND I_VA 1 JP9 hdr1x3 Digikey S1011E 36 ND VA SELECT 1 JP10 hdr1x3 Digikey S1011E 36 ND 3P3V 1 J1 hdr2x7_2mm rh Digikey S5803 21 ND WV4S 1 J2 ED120 3 Digikey ED160...

Page 12: ...ic Input Refer to Figure 2 for a pin out diagram J4 SMA Connector VOUT_AC AC Coupled Analog Output J5 2 pin Header VOUT DC Coupled Analog Output Selection Jumpers on the DAC121C08XEB Evaluation Board...

Page 13: ...13 http www national com Blank Page...

Page 14: ...E PRESIDENT 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 sustai...

Page 15: ...or 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...

Page 16: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments DAC101C08XEB NOPB DAC081C08XEB NOPB...

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