LINEAR MAGNETIC FIELD SENSORS

2

HMC1001/1002 SPECIFICATIONS

Characteristics

Conditions*

Min

Typ

Max

Unit

Bridge Supply

Vbridge referenced to GND

5

12

Volts

Bridge Resistance

Bridge current = 10mA

600

850

1200

ohm

Operating Temperature (4)

-55

150

°C

Storage Temperature (4)

Unbiased

-55

175

°C

Field Range (4)

Full scale (FS), total applied field

-2

+2

gauss

Linearity Error (4)

Best fit straight line

±1 gauss

0.1

0.5

%FS

±2 gauss

1

2

Hysteresis Error (4)

3 sweeps across

±2 gauss

0.05

0.10

%FS

Repeatability Error (4)

3 sweeps across

±2 gauss

0.05

0.10

%FS

S/R Repeatability (1)

10

S/R Repeatability (2)

Output variation after alternate S/R pulses

2

100

µV

Bridge Offset

Offset = (OUT+) – (OUT-), Field=0 gauss

-60

-15

30

mV

after Set pulse, Vbridge=8V

Sensitivity

S/R Current = 3A

2.5

3.2

4.0

mV/V/gauss

Noise Density (4)

Noise at 1 Hz, Vbridge=5V

29

nV/ Hz

Resolution (4)

Bandwidth=10Hz, Vbridge=5V

27

µgauss

Bandwidth (4)

Magnetic signal (lower limit = DC)

5

MHz

OFFSET Strap

Measured from OFFSET+ to OFFSET-

2.5

3.5

ohm

OFFSET Strap

0.39

%/

° C

OFFSET Field (4)

Field applied in sensitive direction

46

51

56

mA/gauss

Set/Reset Strap

Measured from S/R+ to S/R-

1.5

1.8

ohm

Set/Reset Current (2) (3) (4)

2

µs current pulse, 1% duty cycle

3.0

3.2

5

Amp

Set/Reset

Ω Tempco (4)

° C

0.37

%/

° C

Disturbing Field (4)

Sensitivity starts to degrade.

3

gauss

Use S/R pulse to restore sensitivity.

Sensitivity Tempco (4)

° C

Vbridge=8V

-0.32

-0.3

-0.28

%/

° C

Ibridge=5mA

-0.06

Bridge Offset Tempco (4)

° C

no Set/Reset

±0.03

%/

° C

Vbridge=5V

with Set/Reset

±0.001

Resistance Tempco (4)

° C

0.25

%/

° C

Cross-Axis Effect (4)

Cross field=1gauss

no Set/Reset

±3

%FS

(see AN-205)

with Set/Reset

+0.5

Max. Exposed Field (4)

No perming effect on zero reading

10000

gauss

Weight

HMC1001

0.14

gram

HMC1002

0.53

(3) Effective current from power supply is less than 1mA.

(4) Not tested in production, guaranteed by characterization.

(*) Tested at 25

° C except otherwise stated.

Units: 1 gauss (g) = 1 Oersted (in air), = 79.58 A/m, 1G = 10E-4 Tesla, 1G = 10E5 gamma.