New Tunneling Magnetoresistance Current Sensor Evaluation Boards

We "high-light" a new Tunneling Magnetoresistance noncontact current sensor, and demonstrate one-amp, seven amp, and 50-amp evaluation boards.
The ultraminiature sensor has just four connections: two for the output, and two for power.
We connected one-amp boards to a 100-watt bulb. The new ALT023 TMR sensor provides an amazing 930 mV output with no amplification--an order of magnitude more than GMR. This makes the ALT023 a "light-bulb" choice for noncontact current-sensing.
The 7 A and 50 A evaluation boards are connected to a high-current bench supply and provide a ridiculous amount of signal with no amplification. This type of sensor is more efficient than a shunt, and unlike a shunt, it's isolated. The seven-amp sensor output is about 1.3 V compared to the shunt voltage of just 220 mV. For the 50-A version, the output is about 1.1 V at 50 A versus a shunt voltage of 540 mV.
The current-carrying trace can be on the top of the board, the inner-1 layer, or the bottom of the board. Most NVE boards have the trace on the inner-1 layer for a combination of good sensitivity and isolation. The bottom of the board is ideal for high current. We have a free app on our website to calculate the field from a circuit board trace.
Each of the boards has a business-card sized manual with pinouts on one side and key sensor specifications on the other.
The ALT023 has ultra-high sensitivity, superb linearity, an ideal range for current sensing, an ultraminiature package, and high device resistance for low power.
These are the three evaluation boards we demonstrated:
www.nve.com/we...
www.nve.com/we...
www.nve.com/we...
This is the TMR sensor used on the boards:
www.nve.com/we...
And here's our free web app to calculate the field from a circuit board trace:
www.nve.com/sp...