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SENSOR PRODUCTS Preliminary
APPLICATIONS
Compassing Navigation Systems Attitude Reference Traffic Detection Medical Devices Position Sensing
Two-Axis Magnetic Sensors
HMC1052
B
reakthrough design contains a compact, high performance two-axis magnetoresistive sensors on a single chip. Advantages of this patented design include perfectly orthogonal two-axis sensing, ultra small size and low power in a 10-pin miniature surface mount package.
FEATURES AND BENEFITS
Low Power Supply voltage could be as low as 1.8V.
Small Package
Available in a 10-pin miniature surface mount package (MSOP) with total mounting envelope of 3mm x 3mm x 1mm.
High Performance
Sensitivity of 1mV/V/Oe with a wide field range up to +/- 6 Oe.
High Accuracy
Nearly perfect orthogonal two-axis sensing (Error < 0.01) and matched sensitivity on both axis eliminates errors in compassing applications.
On-Chip Coils
Patented on-chip set/reset straps reduces the effects of temperature drift, non-linearity errors and loss of signal output due to the presence of high magnetic fields.
HMC1052
BASIC DEVICE OPERATION
HMC1052 is a two-axis linear magnetic field sensor. Like the other Honeywell HMC10xx devices, each sensor is a resistive Wheatstone bridge formed by a magnetoresistive metal film. When a power supply is connected to the bridge, the sensor converts any ambient or applied magnetic field in the sensitive direction to a voltage output. This device contains two magnetic field sensors with sensitive directions perpendicular to each other; Sensor A and Sensor B coexist on a single silicon chip with nearly perfect orthogonality and matching characteristics. This patented design offers several advantages including small chip size, low operating voltage and eliminates orthogonality errors caused by two chips. In addition to the Wheatstone bridges, HMC1052 has two on-chip magnetically coupled straps - the OFFSET strap and the SET/RESET strap. Sensor A and Sensor B share
SENSOR PRODUCTS
the same OFFSET strap and the SET/RESET strap. These two straps provide localized magnetic fields to sensitive and insensitive directions for Sensor A and Sensor B, respectively. The SET/RESET strap can be used to ensure high accuracy and to flip the polarity of the output response.The OFFSET strap can be used to calibrate the sensor or to offset any undesired stray field. For more information on OFFSET and SET/RESET straps, please refer to Honeywell data sheet "1- and 2-Axis Magnetic Sensors". In the standard MSOP 10-pin package, these two sensors can be powered independently for low power consumption. However, there is no access to OFFSET strap in this package. For applications that requires the OFFSET strap, an alternative package can be assessed and implemented.
LOW VOLTAGE SET/RESET CIRCUIT.
200
1.8V
HMC1052
1F 0.1F
S/R strap(s)
S/R
FDC6327C Si1555DL or ZXMD63C02X
S/R
+2.5-5V
HMC1052
100K
SW1
Vb SR+ Out-
200 AMP623
Out+
2.2uF
tantalum (low R)
Vout
+ R R
SR- Gnd
1) Allow capacitor to charge up to supply (~1 sec.) 2) Momentarily close switch SW1. This creates a >0.5A SET pulse. 3) Wait 1msec for settling, then measure output (Out+ - Out-)
Gnd
2
HMC1052
HMC1052 PRELIMINARY SPECIFICATIONS
Characteristic Bridge Supply Bridge Resistance Operating Temperature Storage Temperature Field Range Linearity Error Conditions* Vbridge referenced to GND Bridge current = 1mA Ambient Ambient, unbiased Full scale (FS) -- total applied field Best fit straight line 1 gauss 3 gauss 6 gauss 3 sweeps across 3 gauss 3 sweeps across 3 gauss Offset = (OUT+) - (OUT-) Field=0 gauss after Set pulse Set/Rest Current = 0.5A Magnetic signal (lower limit = DC) Measured from OFFSET+ to OFFSETTA=-40 to 125C DC Current Field applied in sensitive direction Measured from S/R+ to S/R0.1% duty cycle, or less, 2S Current Pulse TA=-40 to 125C Sensitivity starts to degrade. Use S/R pulse to restore sensitivity. TA=-40 to 125C TA=-40 to 125C Vbridge=5V, TA= -40 to 125C TA= -40 to 125C Sensitive direction in X and Y sensors No perming effect on zero reading 99 20 -3000 500 2500 101 -40 -55 -6 0.05 0.4 1.6 0.1 0.1 1 1.0 5 15 3900 10 4 0.5 3700 Min 1.8 Typ 2.5 1000
SENSOR PRODUCTS
Max 20
Unit Volts
125 150 +6
C C gauss
%FS %FS %FS mV/V mV/V/gauss MHz ppm/C mA/gauss Amp ppm/C gauss ppm/C ppm/C ppm/C 103 0.01 10000 % degree gauss
Hysteresis Error Repeatability Error Bridge Offset Sensitivity Bandwidth OFFSET Strap OFFSET Strap Tempco OFFSET Strap Constant Set/Reset Strap Set/Reset Current Set/Reset Strap Tempco Disturbing Field Sensitivity Tempco Bridge Offset Tempco Bridge Tempco Sensitivity Ratio of X,Y Sensors X,Y sensor Orthogonality Max. Exposed Field
* Tested at 25C except stated otherwise 3
HMC1052
PINOUT DRAWINGS
GND (B) OUT+ (B) GND2 (A) OUT+ (A) VBRIDGE 1 2 3 4 5
SENSOR PRODUCTS
*
A B
10 9 8 7 6
OUT- (A) GND1 (A) S/ROUT- (B) S/R+
Arrow indicates direction of applied field that generates a positive output voltage after an Iset.
MR SENSOR CIRCUIT
VBRIDGE(5)
R
R
R
R
A
OUT(10) R GND1 (9) R GND2 (3) R set/reset S/R + (6) Iset, -Ireset OUT+ OUT(4) (7) R
B
OUT+ (2) R GND (1)
S/R (8)
PACKAGE DRAWING 10-PIN MSOP
D A1 A E E1 Symbol A A1 b D E1 e E L1 Inches x 10E-3 Millimeters Max Min Max Min 0.05 0.15 2.90 2.90 0.50 BSC 4.75 0.95 BSC 1.10 0.15 0.30 3.10 3.10 5.05 2.0 5.9 114 114 2.0 BSC 187 37.4 43 5.9 11.8 122 122 199
*
1
e
b
Honeywell reserves the right to make changes to any products or technology herein to improve reliability, function or design. Honeywell does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
E-Mail: ssec.customer.service@honeywell.com Web Sites: www.ssec.honeywell.com www.magneticsensors.com
900265 1/01
Solid State Electronics Center 12001 State Highway 55 Plymouth, MN 55441 1-800-323-8295

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