National Semiconductor INA260, User Manual

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TUSB3210
8052 C
m
with USB Interface
and UART
8Kx8-byte
EEPROM
+3.3V
V
USB
+5V
Power-On Reset
SM USB DIG Platform
To T
est Board
To Computer and P
ower Supplies
Power
Switching
Switched
Power
USB Bus
from
Computer
USB Power
+5.0V
+3.0V
V
(H-Z, 3.3V, or 5V)
DUT
Buffers and
Level Translators
I C/SPI
Control and
Measure Bits
2
+3.3V
Regulator
www.ti.com
INA260EVM-PDK Hardware
9 SBOU180 – November 2016
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Copyright © 2016, Texas Instruments Incorporated
INA260EVM-PDK and Software Tutorial
2.1 SM-USB-DIG Platform Description
Figure 4 shows the block diagram for the SM-USB-DIG platform. This platform is a general-purpose data
acquisition system that is used on several different Texas Instruments' evaluation modules. The details of
operation are included in a separate document,
SBOU098 (available for download at www.ti.com ).
The primary control device on the SM-USB-DIG platform is the TUSB3210 . The TUSB3210 is an 8052
microcontroller that converts data received on the built-in USB interface to the I
2
C, SPI, and other serial
digital I/O patterns. This EVM uses the I
2
C interface of the TUSB3210 to control the INA260.
Power supply for the SM-USB-DIG is derived from the USB interface. The SM-USB-DIG includes an
onboard low dropout (LDO) regulator that uses the 5-V USB supply from the computer to generate a 3.3-V
supply, which is then used to power all the active circuitry on board. The 3.3-V regulated supply can also
be used to power the EVM PCB. In fact, the raw 5-V USB supply as well as the 3.3-V regulated supply are
routed to a 2-input power MUX on the SM-USB-DIG, the
TPS2115A , whose output terminates at the V
DUT
pin of the 10-pin EVM connector, intended to be used as the EVM power supply. The user can select
between the 5-V and 3.3-V options for V
DUT
through the INA260EVM GUI software.
Figure 4. SM-USB-DIG Platform Block Diagram