Texas Instruments INA220EVM, User Manual, Page: 13 / 26

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INA220EVM Hardware Setup
13 SBOU079B – July 2009 – Revised May 2016
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INA220 Evaluation Module
Table 4. Power-Supply Jumper Configuration #1
Mode Jumper Comment
External Power—5V
(default jumper settings)
JUMP17 = BUS (not used)
JUMP13 = REG
JUMP14 = 9V
JUMP1 = EXT
JUMP2 = EXT
JUMP6 = 5V
JUMP7 = REF In this mode, all power is supplied to the EVM via J5 (on USB DIG board) or
T3. The external supply must be between 5.8V and 10.4V for proper
operation. All digital I/Os are regulated to 5V using U19 (
REG101 ).
External Power—3V
(typical jumper settings)
JUMP17 = BUS (not used)
JUMP13 = REG
JUMP14 = 9V
JUMP1 = EXT
JUMP2 = EXT
JUMP6 = 3V
JUMP7 = REF In this mode, all power is supplied to the EVM via J5 (on USB DIG board) or
T3. The external supply must be between 5.8V and 10.4V for proper
operation. All digital I/Os are regulated to 3V using U19 (
REG101 ).
External Power—Variable
Supply
JUMP17 = Vraw
JUMP13 = BUS
JUMP14 = 9V (not used)
JUMP1 = EXT
JUMP2 = EXT
JUMP6 = 5V (not used)
JUMP7 = REG (ratiometric
mode) In this mode, all the digital I/Os are referenced to the supply that is attached
to either J5 (on USB DIG board) or T3.
CAUTION
It is absolutely critical that the
supply voltage does not exceed
5.5V in this mode.
The supply is directly applied to devices with 5.5V absolute maximum ratings.
This mode of operation is useful when a device supply other then 3.0V or
5.0V is required.
Table 5. Power-Supply Jumper Configuration #2
Mode Jumper Comment
Bus Power—5V JUMP17 = BUS
JUMP13 = BUS
JUMP14 = 9V (not used)
JUMP1 = BUS
JUMP2 = BUS
JUMP6 = 5V (not used)
JUMP7 = REG (ratiometric
mode, 5V supply) In this mode, the USB bus completely powers the EVM. The USB bus is
regulated by the master (computer) to be 5V. This mode relies upon
external regulation. This mode is recommended only when an external
9V supply is not available. If an external 9V supply is available, use
either
External Power 5V mode or External Power 3V mode.
Bus Power—3V JUMP17 = BUS (not used)
JUMP13 = REG
JUMP14 = BUS
JUMP1 = BUS
JUMP2 = BUS
JUMP6 = 3V
JUMP7 = REG (ratiometric
mode, 5V supply) In this mode, the USB bus completely powers the EVM. The regulator
(U19,
REG101 ) is used to generate a 3V supply for all digital I/O.