What this automotive current sensor delivers
The Texas Instruments TMCS1107A2UQDRQ1 is a unidirectional Hall-effect current sensor with a ratiometric voltage output, for AC or DC current sensing. Sensitivity is fixed at 100 mV/A.
AEC-Q100 Grade 1 — qualified, not just capable
This part carries the Automotive, AEC-Q100 series designation, which means it has passed the full suite of AEC-Q100 stress tests — including high-temperature operating life, temperature cycling, and ESD — at the Grade 1 temperature range of -40°C to 125°C. For an OEM auditor reviewing a PPAP submission, that qualification is the difference between a signed-off BOM and a request for a deviation. The part is ROHS3 compliant.
The 80 kHz bandwidth covers switching frequencies up to several hundred kHz with adequate attenuation, suitable for motor-drive phase current feedback and DC-DC converter output monitoring. The 6.5 µs response time defines how quickly the output settles after a step change in sensed current — fast enough for overcurrent detection thresholds in most automotive loads, but not intended for sub-microsecond fault latch circuits.
The 8-pin footprint keeps board area small; the single channel occupies one sense-resistor position on the PCB.
Linearity and output type
Linearity is specified at ±0.5%, which means the output deviates from an ideal straight-line transfer function by no more than half a percent of full scale — tight enough for accurate current monitoring in battery-management and motor-control loops. The ratiometric voltage output scales proportionally with the supply voltage, so the zero-current and full-scale voltages track the ADC reference when both share the same rail.