SBOS825D September 2019 – July 2021 TMCS1101
The TMCS1101 measurable input current range depends on the device variant, as well as the analog supply VS. The output voltage is limited by VOUT swing to either supply or ground. The linear output swing range to both VS and GND is calculated by equations Equation 18 and Equation 19.
Rearranging the transfer function of the device to solve for input current and substituting VOUT,max and VOUT,min yields maximum and minimum measurable input current ranges described by Equation 20 and Equation 21.
TMCS1101AxB variants accommodate bidirectional current sensing by creating zero-current output voltage equal to half of the supply (VS) potential, while TMCS1101AxU variants provide most of the measurable range for positive currents.