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Texas Instruments TMCS1108A1UQDT — Sensors & Transducers

TMCS1108A1UQDT Hall-Effect Current Sensor

MPNTMCS1108A1UQDT
End of Life

Texas Instruments TMCS1108A1UQDT, Hall-effect current sensor, ratiometric voltage output, 50 mV/A sensitivity, 80 kHz bandwidth, ±0.5% linearity, -40°C to 125°C, 8-SOIC package.

$2.7Ref. price · indicative, final on quote
Texas Instruments TMCS1108A1UQDT datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TMCS1108A1UQDT specifications
ParameterValue
Sensor typeHall Effect
MountingSurface Mount
Voltage3V ~ 5.5V
Current - supply6mA
Frequency80kHz
Response time6.5µs
Operating temperature-40°C ~ 125°C (TA)
OutputRatiometric, Voltage
PackageTape & Reel (TR); Cut Tape (CT)
Linearity±0.5%
Sensitivity50mV/A
PolarizationUnidirectional
For measuringAC/DC
Case8-SOIC (0.154\", 3.90mm Width)
Channels1

Product details

Ratiometric voltage output and 50 mV/A sensitivity

The TMCS1108A1UQDT outputs a ratiometric voltage proportional to the sensed current, with a sensitivity of 50 mV/A. The ratiometric output inherently rejects supply noise because the ADC reference and sensor share the same rail. For a 3.3 V system, the full-scale input current is 66 A; at 5 V it is 100 A. Confirm your maximum load current stays within this span.

80 kHz bandwidth and 6.5 µs response time

An 80 kHz bandwidth captures switching-frequency ripple in SMPS and motor-drive loops — enough to see the fundamental and lower-order harmonics of a 20 kHz PWM. The 6.5 µs response time means the output settles within one switching cycle for most power stages. The ±0.5% linearity holds across the full input range, so the transfer function stays predictable from milliamps to the rated maximum. No gain calibration is needed at the board level for most monitoring applications.

Industrial temperature range and 8-SOIC package

The 8-SOIC package is a standard footprint — no special paste or stencil required. The 6 mA maximum supply current keeps self-heating low in the SOIC package. Sourced per RFQ — confirm your BOM quantity and target delivery window for a pricing and lead-time check.

Frequently asked questions

Is TMCS1108A1UQDT unidirectional and can it sense AC?

Yes — the sensor is polarized as unidirectional but measures both AC and DC. The ratiometric output voltage is offset above ground, so an AC waveform appears as a DC-shifted sine wave. The ADC must be able to read the offset and the swing; a 0 V to 5 V ADC input range works with a 5 V supply.

What is the closest pin-compatible alternative to TMCS1108A1UQDT?

The TMCS1108 family includes multiple sensitivity grades in the same 8-SOIC footprint. The A1 variant (50 mV/A) is the standard sensitivity; the A2 (100 mV/A) and A4 (200 mV/A) offer higher gain for lower current ranges. All share the same pinout and supply range — swap the sensitivity to match your full-scale current without a board layout change.