Texas Instruments DAC8771EVM, Руководство пользователя

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EVM Hardware Overview
www.ti.com
4 SLAU727 – August 2017
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Copyright © 2017, Texas Instruments Incorporated
DAC8771 Evaluation Module
2.2 Electrostatic Discharge Warning
Many of the components on the EVM are susceptible to damage by electrostatic discharge (ESD). Users
are advised to observe proper ESD handling precautions when unpacking and handling the EVM,
including the use of a grounded wrist strap at an approved ESD workstation.
2.3 Jumper Summary
Table 3 summarizes all of the EVM jumper functionality.
Table 3. EVM Jumper Summary
Jumper Label Default Position Function
JP1 1-2
1-2 Selects positive buck-boost to supply VPOS
2-3 Selects PVDD/AVDD to supply VPOS
JP2 1-2
1-2 Selects negative buck-boost to supply VNEG
2-3 Selects EXT_VNEG to supply VNEG
JP3 Installed
Installed VSENSEP is shorted to VOUT onboard
Not installed VSENSEP is shorted to VOUT off board
JP4 Installed
Installed Loads VOUT/IOUT with a short to GND
Not installed Unloads VOUT/IOUT of the short to GND
JP5 Installed
Installed Loads VOUT/IOUT with a 249- Ω resistor
Not installed Unloads VOUT/IOUT 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-k Ω resistor
Not installed Unloads VOUT/IOUT of the 1-k Ω resistor
JP8 Installed
Installed VSENSEN is shorted to GND onboard
Not installed VSENSEN is shorted to GND off board
JP9 Installed
Installed When HART_IN is not in use, AC couple to GND
Not installed When HART_IN is in use, disconnect from GND
JP10 Not installed
Installed Selects the external DVDD
Not installed Disconnects the external DVDD
JP11 1-2
1-2 Selects the DAC8771 internal reference
2-3 Selects the REF5050 external reference
JP12 2-3
1-2 Issues a clear command to the DAC8771
2-3 No operation
JP13 Not installed
Installed Issues a hardware reset to the DAC8771
Not installed No operation
JP14 Installed
Installed Select asynchronous update mode
Not installed Select asynchronous update mode
JP15 Not installed
Installed Disables internal DVDD LDO
Not installed Enables internal DVDD LDO
JP16 Not installed
Installed Connects the SM-USB-DIG supply to DVDD
Not installed Disconnects SM-USB-DIG supply for DVDD
JP17 Not installed
Installed RSET is connected to external Resistor
Not installed Internal current setting resistor is used