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Texas Instruments DAC8771EVM User Manual Download Page 15

VPOS_IN
VNEG_IN

HART_IN

SPI_MOSI
SPI_MISO
SPI_SCLK
SPI_CS

SPI_LDAC

CLR
RESET
ALARM

VSENSEN

VSENSEP

IOUT

VOUT

CCOMP

LN

LP

GND

PVDD/AVDD

0.1µF

C22

1µF

C23

GND

DVDD

DIG_DVDD

GND

SPI_MISO

SPI_SCLK

SPI_CS

SPI_MOSI
RESET

DIG_DVDD

SPI_LDAC

0.1µF

C21

EXT_VREF

SPI_CS

SPI_MOSI

SPI_MISO

SPI_LDAC

SPI_SCLK

ALARM

ALARM

DVDD

10k

R12

PVDD/AVDD

EXT_VNEG

TP11

GND

TP10

GND

TP9

GND

TP8

GND

TP6
EXT_VNEG

TP5
PVDD/AVDD

TP4

VREF_IN

10µF

C24

10µF

C25

10µF

C26

DVDD

200pF

C27

DVDD

10k

R11

RESET

RESET

DVDD

CLR

CLR

TP7

DVDD

ALARM

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

REFOUT

REFIN

GND

DIG_DVDD

PVDD

REFIN

REFOUT

PVSS

ALARM

45

AVDD

2

NC

22

CCOMP

31

CLR

43

DAC_GND

28

DCDC_AGND

18

DVDD_EN

6

DVDD

7

GND1

9

GND2

20

LDAC

42

HART_IN

32

IOUT

26

LN

17

LP

15

NC

24

NC

8

NC

1

NC

10

NC

19

NC

36

NC

37

NC

12

NC

21

NC

13

NC

46

NC

47

NC

48

PVDD

14

PVSS

16

REFGND

3

REFIN

5

REFOUT

4

NC

33

NC

35

NC

34

SCLK

40

SDIN

39

SDO

38

SYNC

41

VNEG

11

VNEG_IN

27

VOUT

25

VPOS_IN

23

VSENSEN

30

VSENSEP

29

RESET

44

PAD

49

DAC8771RGZR

U2

1

2

3

JP11

1

2

3

JP12

JP15

JP16

JP13

JP14

JP10

J3

J4

J5

5
4

1

2

3

6

7

8

9

10

J1

5

4

1
2
3

6
7
8
9
10

J2

SPI_SDI
SPI_CS
GND
SPI_CLK
VDUT
SPI_SDO
GPIO1
I2C_SDA
GPIO2
I2C_SCK

Copyright © 2018, Texas Instruments Incorporated

www.ti.com

EVM Documentation

15

SLAU727 – August 2017

Submit Documentation Feedback

Copyright © 2017, Texas Instruments Incorporated

DAC8771 Evaluation Module

Figure 13. Schematic 2

Summary of Contents for DAC8771EVM

Page 1: ...re Overview 3 3 EVM Software Setup 9 4 EVM Software Overview 11 5 EVM Documentation 14 List of Figures 1 DAC8771EVM Hardware Setup 3 2 DAC8771EVM Block Diagram 3 3 PVDD AVDD and DVDD Supply Connections 5 4 Digital Communication Test Points 6 5 Onboard Reference Supply Connections 7 6 Output Terminal Block Connections and Load Jumpers 7 7 SM USB DIG Connection 8 8 DAC8771EVM Installer 9 9 DAC8771EV...

Page 2: ...ontents of the EVM kit Contact the nearest Texas Instruments Product Information Center or visit the Texas Instruments E2E Community http E2E ti com if any component is missing Table 1 Contents of DAC8771EVM Kit Item Item QTY Description or Use 1 DAC8771EVM PCB 1 EVM hardware 2 USB Extension Cable 1 Connects PC USB port to SM USB DIG USB connector 3 SM USB DIG Platform 1 Platform used for digital ...

Page 3: ...e that communicates with the SM USB DIG platform which provides the power and digital signals used to communicate with the EVM board Connectors on the EVM board allow the user to connect the required external power supplies for the configuration under test The SM USB DIG must be connected to the DAC8771EVM with the Texas Instruments logo facing up Figure 1 DAC8771EVM Hardware Setup 2 1 EVM Board B...

Page 4: ...T of the 249 Ω resistor JP6 Not installed Installed Loads VOUT IOUT with a 624 Ω resistor Not installed Unloads VOUT IOUT of the 625 Ω resistor JP7 Not installed Installed Loads VOUT IOUT with a 1 kΩ resistor Not installed Unloads VOUT IOUT of the 1 kΩ resistor JP8 Installed Installed VSENSEN is shorted to GND onboard Not installed VSENSEN is shorted to GND off board JP9 Installed Installed When H...

Page 5: ...ive supply for the output signal chain and VNEG the negative supply for the output signal chain may be powered by the DAC8771 internal buck boost converters or by off board supply voltages WARNING Permanent device damage may occur if externally supplying VPOS or VNEG while the internal buck boost supply is enabled When using the DAC8771 internal buck boost converters to supply VPOS and VNEG instal...

Page 6: ...onfiguration take care to ensure that digital logic thresholds of the host and DAC8771 match and that the absolute maximum ratings of the DAC8771 are not violated 2 5 EVM Features This section describes some of the hardware features present on the EVM board 2 5 1 Communication Test Points The EVM board features test points for monitoring the communication between the SM USB DIG and the DAC8771 Hea...

Page 7: ...d on terminal block J7 by the OUT test points The VSENSEP and VSENSEN sense connections may be provided onboard or externally closer to the point of load through terminal block J7 To provide the VSENSEP connections onboard install JP3 Similarly to provide the VSENSEN connections onboard install JP8 Removing these jumpers requires that the sense connections are made external to the EVM board Figure...

Page 8: ...igure 7 Make sure that the two connectors are completely pushed together as loose connections may cause intermittent operation Figure 7 SM USB DIG Connection 2 7 Signal Definitions of J1 10 Pin SM USB DIG Connector Table 4 shows the pin out for the 10 pin connector used to communicate between the EVM and the SM USB DIG Note that the I2 C communication lines I2C_SCL and I2C_SDA1 are not used Table ...

Page 9: ...e Installation Download the EVM software by following the instructions provided external to this document To install the software locate and extract the file named DAC8771 zip to a specific folder for example C DAC8771 on the hard drive Figure 8 DAC8771EVM Installer After the files are extracted navigate to the folder created on the hard drive Locate and execute the setup exe file to start the ins...

Page 10: ...1EVM Install Path After selecting the installation directory two license agreements are presented that must be accepted Figure 10 DAC8771EVM Software License Agreements After accepting the Texas Instruments and National Instruments license agreements the progress bar opens and shows the installation of the software Once the installation process is completed click Finish ...

Page 11: ... EVM If this error happens first ensure that the USB cable is properly connected on both ends This error can also occur if the USB cable is connected before the SM USB DIG platform power source Another possible source for this error is a problem with the USB human interface driver on the PC Make sure the device is recognized when the USB cable is plugged in as indicated by a Windows generated conf...

Page 12: ...sters of the device to synchronize the GUI and hardware A hardware clear command can be issued through JP12 If a hardware clear is issued the READ ALL button should be pressed to synchronize the GUI and hardware 4 4 DAC Controls 4 4 1 DAC Output The DAC can be configured for voltage or current output of various spans through the DAC Output Mode control on the GUI The DAC output can be set to activ...

Page 13: ...ent Output DAC With Adaptive Power 4 6 Slew Rate Controls Control the slew rate of the channel with the Slew Control register By default the slew rate control feature is disabled To enable the slew rate control feature the Slew Control Enable Boolean control must be checked When the control is checked slew rate Step Size and Clock registers may be used to control the slew rate of the output throug...

Page 14: ...GKR 0 1µF C11 EXT_VREF 1µF C10 1µF C12 GND GND GND 10 0 R2 10 0 R1 1µF C5 1µF C6 DNI C16 DNI C19 0 5 R3 47µF C13 1 2 3 JP2 1 2 3 JP1 JP3 JP8 JP9 JP4 JP5 JP6 JP7 J6 ED555 2DS 1 2 3 4 J7 10µF C9 Copyright 2018 Texas Instruments Incorporated EVM Documentation www ti com 14 SLAU727 August 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated DAC8771 Evaluation Module 5 EVM D...

Page 15: ...T PVSS ALARM 45 AVDD 2 NC 22 CCOMP 31 CLR 43 DAC_GND 28 DCDC_AGND 18 DVDD_EN 6 DVDD 7 GND1 9 GND2 20 LDAC 42 HART_IN 32 IOUT 26 LN 17 LP 15 NC 24 NC 8 NC 1 NC 10 NC 19 NC 36 NC 37 NC 12 NC 21 NC 13 NC 46 NC 47 NC 48 PVDD 14 PVSS 16 REFGND 3 REFIN 5 REFOUT 4 NC 33 NC 35 NC 34 SCLK 40 SDIN 39 SDO 38 SYNC 41 VNEG 11 VNEG_IN 27 VOUT 25 VPOS_IN 23 VSENSEN 30 VSENSEP 29 RESET 44 PAD 49 DAC8771RGZR U2 1 ...

Page 16: ...st 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated DAC8771 Evaluation Module 5 2 EVM PCB Components Layout Figure 14 shows the layout of the components for the EVM board Figure 14 DAC8771EVM PCB Components Layout ...

Page 17: ...Polarity Mark CDSOD323 T36SC Bourns D5 1 75V Diode Switching 75V 0 3A SOT 23 SOT 23 BAV99 7 F Diodes Inc FB1 1 600 ohm Ferrite Bead 600 ohm 100MHz 3A 1210 H 2 5mm 1210 H 2 5mm FBMH3225HM601NT Taiyo Yuden H1 H2 H3 H4 4 Bumpon Hemisphere 0 44 X 0 20 Clear Transparent Bumpon SJ 5303 CLEAR 3M J1 1 Header 100mil 10x1 Gold TH 10x1 Header TSW 110 07 G S Samtec J2 1 Receptacle 50mil 10x1 Gold R A TH recep...

Page 18: ...d Test Point Compact Red TH Red Compact Testpoint 5005 Keystone TP8 TP9 TP10 TP11 4 Black Test Point Compact Black TH Black Compact Testpoint 5006 Keystone U1 1 Low Noise Very Low Drift Precision Voltage Reference DGK0008A DGK0008A REF5050IDGKR Texas Instruments REF5050IDGKT Texas Instruments U2 1 Single Channel 16 Bit Voltage and Current Output Digital to Analog Converter with Adaptive Power Mana...

Page 19: ...y set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warr...

Page 20: ...the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la réglementation d Industrie Canada le présent émetteur radio peut fo...

Page 21: ...ed loads Any loads applied outside of the specified output range may also result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Please consult the EVM user guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even ...

Page 22: ...COST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN TWELVE 12 MONTHS AFTER THE EVENT THAT GAVE RISE TO THE CAUSE OF ACTION HAS OCCURRED 8 2 Specif...

Page 23: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

Page 24: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments DAC8771EVM ...

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