COMPARISON BULLETIN

The advantages of NVE’s groundbreaking Smart GMR/TMR Magnetometers over other programmable magnetometers are summarized below (click on the links for more details on specific parts):
 

Part	Technology	Interface/   Programming	Full-Scale Sensitivity  (most sensitive range)	Accuracy –40–125°C		Magnetic Bandwidth	Smallest Surface-Mount Pkg
				% of full-scale	Field
Allegro A1454	Hall-effect	I²C	50 mT	±7%	±3.5 mT	2 kHz	4.4 x 3 mm  TSSOP8
Infineon TLE4998S	Hall-effect	Modified SENT	50 mT		±2.6 mT	800 Hz max.  update rate	5 x 4 mm  SOIC8
Melexis MLX90288	Hall-effect	Analog/ off-line Programmer	6 mT	±4%	N.S.	2 kHz	4.4 x 3 mm  TSSOP8
Micronas HAL2420	Hall-effect	Analog/ off-line Programmer	6 mT	N.S.	±2 mT	2 kHz	5 x 4 mm  SOIC8 or TO-92
Silicon Labs  Si7210/Si7213	Hall-effect	I²C or SENT	20 mT	>12.5%	±2.5 mT	“up to 20 kHz” (limited by update rate)	2.9 x 2.8 mm  SOT-23
NVE SM124	GMR (General Purpose)	I²C	1 mT	10%	±0.1 mT	5 kHz	2.5 x 2.5 mm  leadless TDFN
NVE SM225	TMR (High speed)	SPI	15 mT	4%	±0.6 mT	7.5 kHz
NVE SM324	TMR (Ultrahigh accuracy)	I²C	2 mT	1%	±0.02 mT	135 Hz

Convenient Magnetic Orientation
Unlike the competition’s awkward, old-fashioned Hall-effect sensor elements, NVE smart magnetometers use GMR and TMR, which are sensitive in-plane for optimal current sensing and easy mechanical interfaces.

Most Accurate
NVE magnetometers have straightforward accuracy specifications that cover all error sources, including sensitivity, offset, nonlinearity, hysteresis, noise, and supply variation. For other parts you have to add up all the errors. All three of NVE’s smart magnetometers have the best accuracy in their class, and the SM324 is the world’s most accurate smart sensor.

Fastest
The SM124 and SM225 have high-speed GMR/TMR sensor elements and sample rates to take advantage of that speed.

Smallest
NVE offers the smallest magnetometers with microcontroller interfaces in the industry, a 2.5 x 2.5 mm leadless TDFN.

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