KTH3105
Manufacturer: CONNTEK
The KTH3105 gives 3.30 mV/Gs at 3.3 V across a ±420 Gs span — roughly a third of the KTH3101 range with three times the output per gauss. That balance is the reason it turns up in travel sensing: pedal, throttle and shift mechanisms move a short distance and the signal has to arrive at the ADC cleanly. Output noise is 4.8 mVrms, still low enough for 10-bit class measurements.
Overview
The KTH3105 is a high-gain ratiometric linear Hall sensor from CONNTEK, specified at 3.30 mV/Gs with a 3.3 V supply and 5.00 mV/Gs at 5 V. The corresponding field span is about ±420 Gs, which is the range most position and travel sensors need at a typical air gap, making this the usual starting point when the required field range is not yet fixed.
Output is an analog voltage referenced to VDD and quiescent at VDD/2 in zero field. The part runs from 3.0 – 5.5 V at around 4.5 mA, operates from -40 to +125 °C and is offered in SOT-23, TO-92S and DFN1616 packages, so it can be placed according to the mechanical design rather than the electrical one.
Key features
- ±420 Gs span at 3.30 mV/Gs — the usual pick for travel and position sensing
- Ratiometric analog output, quiescent at VDD / 2
- 30 kHz bandwidth covers motor phase current sensing
- 3.0 – 5.5 V supply, −40 to +125 °C operating range
- SOT-23, TO-92S and DFN1616 package options
- Noise low enough for 10-bit class position resolution
Typical applications
- Pedal, throttle and gear-shift travel sensing
- Linear position measurement at a fixed air gap
- Contactless current sensing in busbars and motor phases
- Magnetic field strength measurement
Specifications
Magnetic performance
| Sensitivity @ 3.3 V | 3.30 mV/Gs typ (3.07 – 3.53) |
|---|---|
| Sensitivity @ 5 V | 5.00 mV/Gs typ (4.65 – 5.35) |
| Magnetic range @ 3.3 V | ±420 Gs |
| Magnetic range @ 5 V | ±450 Gs |
| Output noise @ 3.3 V | 4.8 mVrms typ |
| Sensitivity drift | 0.1 %/°C typ |
| Linearity error | ±1.5 % |
Electrical
| Supply voltage | 3.0 – 5.5 V |
|---|---|
| Quiescent output | VDD / 2 (1.65 V at 3.3 V, 2.50 V at 5 V) |
| Output linear range | 0.25 V to VDD − 0.25 V |
| Supply current | 4.5 mA typ @ 3.3 V, 5.4 mA typ @ 5 V |
| Bandwidth | 30 kHz (−3 dB) |
| Power-on time | 20 µs typ |
| Load capacitance | ≤ 10 nF |
Package and temperature
| Packages | SOT-23, TO-92S, DFN1616 |
|---|---|
| Pins | VDD / OUT / GND |
| Operating temperature | -40 – +125 °C |
Family sensitivity options
| KTH3101 | 1.00 mV/Gs @ 3.3 V · ±1400 Gs |
|---|---|
| KTH3102 | 1.65 mV/Gs @ 3.3 V · ±840 Gs |
| KTH3103 | 2.25 mV/Gs @ 3.3 V · ±620 Gs |
| KTH3105 | 3.30 mV/Gs @ 3.3 V · ±420 Gs |
| KTH3110 | 6.60 mV/Gs @ 3.3 V · ±210 Gs |
| KTH3113 | 8.90 mV/Gs @ 3.3 V · ±150 Gs |
Note on parameters. The figures above are taken from the manufacturer datasheet for KTH3105. Electrical limits vary by ordering option and revision — confirm the current datasheet before finalising your design.
Package and ordering
| Ordering code | Package | Operating temp. / grade |
|---|---|---|
| KTH3105 | SOT-23 / TO-92S / DFN1616 | -40 to +125 °C |
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Sourcing KTH3105
We supply KTH3105 with original manufacturer documentation and a quotation that states lead time, packaging and price breaks. Send your annual quantity and target date and you will get a reply with the datasheet attached.