Honeywell HMC1001, HMC1002, HMC1021, HMC1022 User Manual

hmc1022

		SENSOR PRODUCTS
		1- and 2-Axis Magnetic
	APPLICATIONS
	Compassing	Sensors
	Navigation Systems
	Attitude Reference	HMC1001 / 1002
	Traffic Detection	HMC1021 / 1022
	Medical Devices
	Non-Contact Switch	onfigured as a 4-element
		wheatstone bridge, these
		Cmagnetoresistive sensors
		convert magnetic fields to
		a differential output volt-
		age, capable of sensing
		magnetic fields as low as
		30 gauss. These MRs
		offer a small, low cost,
		high sensitivity and high
		reliability solution for low
		field magnetic sensing.

Not actual size

FEATURES AND BENEFITS

Wide Field Range Field range up to ±6 gauss, (earth’s field = 0.5 gauss)

Small Package	• Designed for 1- and 2-axis to work together to provide 3-axis (x, y, z) sensing
	• 1-axis part in an 8-pin SIP or an 8-pin SOIC or a ceramic 8-pin DIP package
	• 2-axis part in a 16-pin or 20-pin SOIC package
Solid State	These small devices reduce board assembly costs, improve reliability and ruggedness com-
	pared to mechanical fluxgates.
On-Chip Coils	Patented on-chip set/reset straps to reduce effects of temperature drift, non-linearity errors and
	loss of signal output due to the presence of high magnetic fields
	Patented on-chip offset straps for elimination of the effects of hard iron distortion
Cost Effective	The sensors were specifically designed to be affordable for high volume OEM applications.

LINEAR MAGNETIC FIELD SENSORS

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	µV
S/R Repeatability (2)	Output variation after alternate S/R pulses			2	100
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 Ω Tempco (4)	TA = -40 to 125° C			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)	T A = -40 to 125° C			0.37		%/° C
Disturbing Field (4)	Sensitivity starts to degrade.		3			gauss
	Use S/R pulse to restore sensitivity.
Sensitivity Tempco (4)	T A = -40 to 125° C	Vbridge=8V	-0.32	-0.3	-0.28	%/° C
		Ibridge=5mA		-0.06
Bridge Offset Tempco (4)	T A = -40 to 125° C	no Set/Reset		±0.03		%/° C
	Vbridge=5V	with Set/Reset		±0.001
Resistance Tempco (4)	T A = -40 to 125° 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

(1)VBridge = 4.3V, IS/R = 3.2A, VOUT = VSET – VRESET

(2)If VBridge = 8.0V, IS/R = 2.0A, lower S/R current leads to greater output variation.

(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.

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LINEAR MAGNETIC FIELD SENSORS

HMC1021/1022 SPECIFICATIONS

Characteristic		Conditions**		Min	Typ	Max	Unit
Bridge Supply		Vbridge referenced to GND			5	25	Volts
Bridge Resistance		Bridge current = 5mA		800	1100	1300	Ω
Operating Temperature (1)		HMC1021S, 1021Z, 1022		-55		150	°C
		HMC1021D*		- 55		300*
Storage Temperature (1)		Unbiased		-55		175	°C
Field Range (1)		Full scale (FS), — total applied field		-6		+6	gauss
		Best fit straight line	±1 gauss		0.05
Linearity Error (1)			±3 gauss		0.4		%FS
			±6 gauss		1.6
Hysteresis Error (1)		3 sweeps across ±3 gauss			0.08		%FS
Repeatability Error (1)		3 sweeps across ±3 gauss			0.08		%FS
Bridge Offset		Offset = (OUT+) – (OUT-), Field = 0 gauss		-10	±2.5	11.25	mV
		After Set pulse, Vbridge=5V
Sensitivity		S/R Current = 0.5A		0.8	1.0	1.25	mV/V/gauss
Noise Density (1)		Noise at 1Hz, Vbridge=5V			48		nV/√Hz
Resolution (1)		Bandwidth=10Hz, Vbridge=5V			85		µgauss
Bandwidth (1)		Magnetic signal (lower limit = DC)			5		MHz
OFFSET Strap		Measured from OFFSET+ to OFFSET-		38	50	60	Ω
OFFSET Strap Ω Tempco (1)		TA = -40 to 125° C			0.39		%/° C
OFFSET Field (1)		Field applied in sensitive direction		4.0	4.6	6.0	mA/gauss
Set/Reset Strap		Measured from S/R+ to S/R-		5.5	7.7	9	Ω
Set/Reset Current		2µs current pulse, 1% duty cycle		0.5	0.5	4.0	Amp
Set/Reset Ω Tempco (1)		TA = -40 to 125° C			0.37		%/° C
Disturbing Field (1)		Sensitivity starts to degrade. Use S/R		20			gauss
		pulse to restore sensitivity.
Sensitivity Tempco (1)		TA = -40 to 125° C	Vbridge=5V	-0.32	-0.3	-0.28	%/° C
			Ibridge=5mA		-0.06
Bridge Offset Tempco (1)		TA = -40 to 125° C	no Set/Reset		±0.05		%/° C
		Vbridge=5V	with Set/Reset		±0.001
Resistance Tempco (1)		Vbridge=5V, TA = –40 to 125° C			0.25		%/° C
Cross-Axis Effect (1)		Cross field=1 gauss
		(see AN-205) Happlied=±1 gauss			+0.3		%FS
Max. Exposed Field (1)		No perming effect on zero reading				10000	gauss
Set/Reset (1)		S/R current ≥ 0.5 Amps				30	µV

*Please reference data sheet, HTMC1021D for specifications.

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

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

**Tested at 25° C except otherwise stated.

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LINEAR MAGNETIC FIELD SENSORS

KEY PERFORMANCE DATA

Sensor output vs magnetic field after being set or reset

Sensor output vs magnetic field Output is repeatable in field range ±20 Oe

	15					60
	10	1021/1022
		Vb=5V				40
					VoltageOutput(mV)
OutputVoltage(mV)	5					20
	0
				Reset		0
	-5			Set
	-10					-20
		2 sweeps				-40
	-15
	-20					-60
	-2	-1	0	1	2

	1021/1022
	Vb=5V
					2 sweeps
-20	-15	-10	-5	0	5	10	15	20

Field (Oe)

Field (Oe)

Sensor noise vs frequency

1000

1021/1022

Vb=5V

Hz)
(nV/rtDensity	100
Noise	10
	1

0.1

1

10

100

1000

Frequency (Hz)

Bridge resistance vs temperature

	1400
	1300	All types
(ohm)		Vb=5V
	1200
Resistance
	1100
	1000
	900
	-50	-25	0	25	50	75	100	125

Sensitivity vs temperature

Constant voltage power supply

	1.3
	1.2					1021/1022
						Vb=5V
(mV/V/Oe)	1.1
	1
Sensitivity	0.9
	0.8
	0.7
	0.6
	-50	-25	0	25	50	75	100	125

Temperature (C)

		Effects of set/reset pulse variation
	2 sec pulse duration, S/R voltage >4V is recommended
	1
					Vb=5V
					1021/1022
	0.8
Nonrepeatability				Null Voltage (mV) (Set)
	0.6			Null Voltage (mV) (Reset)
				Sensitivity (mV/V/Oe) (Set)
	0.4	nonoset/resetinint		Sensitivity (mV/V/Oe) (Reset)
		thisregionregion
	0.2
	0
	0	1	2	3	4	5

Temperature (C)

Set/Reset Voltage (V)

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LINEAR MAGNETIC FIELD SENSORS

PACKAGE / PINOUT SPECIFICATIONS

HMC1002—Two-Axis MR Microcircuit

HMC1001—One Axis MR Microcircuit

GND1 (A) 1

20

S/R- (A)

OUT+ (A) 2

Die A

19

NC

S/R+ 1

•

OFFSET- (A) 3

18

GND PLN

OFFSET+ 2

Vbridge (A) 4

17

OFFSET (+A)

S/R-

3

Die

OUT- (A) 5

16

S/R+ (A)

GND 4

GND2 (A) 6

Die B

15

OFFSET+ (B)

Out+ 5

S/R- (B) 7

14

S/R+ (B)

OFFSET- 6

GND1 (B) 8

13

GND2 (B)

Out+ (B) 9

12

OUT- (B)

Vbridge

7

Out-

8

OFFSET- (B) 10

11

Vbridge (B)

HMC1022—Two-Axis MR Circuit HMC1021S—One-Axis MR Circuit

OFFSET- (A)

1

•

16

OFFSET+ (A)

OUT+ 1

• Die

8 OFFSET-

OUT+ (A)

2

Die A

15

S/R- (A)

VBRIDGE (A)

3

14

S/R+ (A)

VBRIDGE 2

7

OFFSET+

GND 3

6

S/R-

OUT- (A)

4

13

GND (B)

OUT- (B)

5

Die B

12

OUT+ (B)

OUT- 4

5

S/R+

VBRIDGE (B)

6

11

OFFSET- (B)

GND (A)

7

10

OFFSET+ (B)

HMC1021S

S/R+ (B)

8

9

S/R- (B)

HMC1021D—One-Axis MR Circuit				HMC1021Z—One-Axis MR Circuit
OUT+ 1	8		OFFSET-	OUT- 1	•
VBRIDGE 2	Die		OFFSET+	VBRIDGE 2
	7
GND 3		6	S/R-	S/R+ 3	Die
				GND 4
OUT- 4	5		S/R+

S/R- 5

OFFSET+ 6

OFFSET- 7

OUT+ 8

Arrow indicates direction of applied field that generates a positive output voltage after a SET pulse.

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