Hardware
7
SBOU209A – August 2019 – Revised March 2020
Copyright © 2019–2020, Texas Instruments Incorporated
TMCS1100EVM
•
The selected device must allow the output voltage to remain within the acceptable range after the load
current is transduced and amplified by the respective device gain. The maximum output voltage must
remain within the range of 25 mV above ground to 100 mV below the supply voltage.
•
Choose an appropriate gain to create the largest appropriate output swing, and to minimize error.
3.2.9
Temperature Sensor
U2x is a temperature sensor that is not required for TMCS1100 operation. However, U2x provides the
option of measuring board temperature for determining ambient conditions.
3.2.10
Reference Divider Buffer
U3x is the TLV376IDBVR. U3X is configured as a buffer that sets the TMCS1100 at mid-supply according
to the voltage divider composed of R3x and R4x by default. The user has the option to either short out this
buffer with a 0-
Ω
resistor at R5x or replace the amplifier with another amplifier that has a common-mode
range and output-swing range that allows for a divided voltage of interest.