Nano-granular TMR type Magnetic Sensors, J and H series

Nano-granular TMR type Magnetic Sensors, J and H series

"Innovative Technology and Product Award" in 2013.
(Joint award with Research Institute for Electromagnetic Materials)

The nano-granular TMR(tunneling magnetoresistance) type magnetic sensor J series and H series are powerful and easy to use solution that realize precise and high sensitive magnetic field detections. The seires have various features as follows.

※ The nano-granular TMR type magnetic sensor is based on GIGS®, which is the invention of Research Institute for Electromagnetic Materials (DENJIKEN). GIGS® is a registered trademark of DENJIKEN.

  • Features
  • Samples

Features

1. Minute Size = High Spacial Resolution

The unit size of TMR element of this series is very small (a few tens of micrometres). It rializes magnetic field detection with high spacial resolution. Fig.1 shows outlook of H series chip which has four sensor elements with a full bridged circuit on the chip of 0.4mm square.

Nano-granular TMR sensor with full bridged circuit

Fig.1. Nano-granular TMR sensor
with full bridged circuit.

2. High output voltage = High S/N Ratio

Since nano-granular TMR sensor indicates no less than 7% of high MR(magnetoresistance) ratio within the effective magnetic field range (Hk), high output voltage can be obtained from its full bridged circuit(Fig.2). The high output signal makes the signal/noize ratio enlarge. As a result, it may be possible to raise the magnetic field detection accuracy or to simplify the signal processing circuit.

Fig.3 shows an example of driving circuit for J and H series. The output voltage of 220 mV is obtained at 5 V of power-supply.

Example of bridged circuit composition

Fig. 2. Example of bridged circuit composition

Relation between magnetic field and output voltage

Fig. 3. Relation between magnetic field
and output voltage
(sensor type of Hk=±8 kA/m)

3. Low Hysteresis = Good Output Repeatability

J and H series have the smallest hysteresis into MR type. The nano granular TMR film is in the superparamagnetic state so that it does not have hysteresis theoretically.

4. Low Power Consumption

The resistance of the Jand H Series are very high ( 100 kΩ for J type and 500 kΩ for H type), and it suppresses the power consumption. It will help long time battery use.

Samples

J and H series bare chip samples are available. LCC packaged samples for only evaluation are also available.

  • Full bridge arrangement on the small chip size of 0.40 mm square or 0.65 mm square.
  • Mounting with Au wire bonding is required.
  • Low ESD environment is required during mounting.

【Electro-magnetic specification】

Supply voltage (Vcc) 1 to 5V
Absolute maximum rating (Vcc) 10V
Output voltage (Vout) 350 mV P-P (Min) (in the case of Vcc=5V, rotation magnetic field H=Hk, and differential output Vout1-Vout2)
Offset voltage (Voff) 150 mV (Max)
ESD voltage 100V (Typ, human body mode)
Temperature range -40℃ to 125℃

J-series (100 kΩ resistance type)

Model No.
Resistance
(without field)
Effective magnetic field, Hk
Chip size
Data sheet
J01 100 kΩ ± 4 kA/m
(50 Oe)
L0.65 mm×W0.65 mm×H0.13 mm PDF:585KB
J02 100 kΩ ± 8 kA/m
(100 Oe)
L0.65 mm×W0.65 mm×H0.13 mm
J03 100 kΩ ±16 kA/m
(200 Oe)
L0.65 mm×W0.65 mm×H0.13 mm
J04 100 kΩ ±24 kA/m
(300 Oe)
L0.65 mm×W0.65 mm×H0.13 mm

H-series (500 kΩ resistance type)

Model No.
Resistance
(without field)
Effective magnetic field, Hk
Chip size
Data sheet
H21 500 kΩ ± 8 kA/m
(100 Oe)
L0.4 mm×W0.4 mm×H0.13 mm PDF:590KB
H22 500 kΩ ±16 kA/m
(200 Oe)
L0.4 mm×W0.4 mm×H0.13 mm
H23 500 kΩ ±24 kA/m
(300 Oe)
L0.4 mm×W0.4 mm×H0.13 mm
H24 500 kΩ ±48 kA/m
(600 Oe)
L0.4 mm×W0.4 mm×H0.13 mm

(2) Packaged sample for evaluation

  • LCC (Leadless Chip Carrier) type resin mold package for surface mounting.
  • Build the J and H series with diode for ESD protection into one package.
  • The reflow soldering process is available(low temperature and short time process is recommended.)

【Electro-magnetic specification】

Supply voltage (Vcc) 1 to 5V
Absolute maximum rating (Vcc) 6V
Output voltage (Vout) 350 mV P-P (Min) (in the case of Vcc=5V, rotation magnetic field H=Hk, and differential output Vout1-Vout2)
Offset voltage (Voff) 150 mV (Max)
ESD voltage 2kV(Typ, human body mode)
Temperature range -40℃ to 125℃

E-series (100 kΩ resistance type)

Model No.
Resistance
(without field)
Effective magnetic field, Hk
Package size
Data sheet
E1 100 kΩ ± 4 kA/m
(50 Oe)
L2.1 mm×W2.1 mm×H1.0 mm Under constructuion
E2 100 kΩ ± 8 kA/m
(100 Oe)
L2.1 mm×W2.1 mm×H1.0 mm
E3 100 kΩ ±16 kA/m
(200 Oe)
L2.1 mm×W2.1 mm×H1.0 mm
E4 100 kΩ ±24 kA/m
(300 Oe)
L2.1 mm×W2.1 mm×H1.0 mm

E-series (500 kΩ resistance type)

Model No.
Resistance
(without field)
Effective magnetic field, Hk
Package size
Data sheet
D3 500 kΩ ± 8 kA/m
(100 Oe)
L2.1 mm×W2.1 mm×H1.0 mm Under constructuion
D4 500 kΩ ±16 kA/m
(200 Oe)
L2.1 mm×W2.1 mm×H1.0 mm
D5 500 kΩ ±24 kA/m
(300 Oe)
L2.1 mm×W2.1 mm×H1.0 mm
D6 500 kΩ ±48 kA/m
(600 Oe)
L2.1 mm×W2.1 mm×H1.0 mm
LCC( lead less chip carrier) type package

Fig. 4. LCC( lead less chip carrier)
type package

Dimension and equivalent circuit of packaged sensor

Fig. 5. Dimension and equivalent circuit of packaged sensor

Flexible Customization

Custom designed products are welcome.
Resistance and the effective magnetic field range (saturation point, Hk) can be designed flexible and independently.
The resistance and the magnetic field range (Hk) can be customized in the range of a few tens kΩ to a few thousands kΩ and about 0.4 kA/m to about 50 kA/m, respectively (Fig. 6).
However, since an output (rate of = resistance change) is constant, if the effective magnetic field range is enlarged, sensitivity will become small.

The range of custom design

Fig. 6. The range of custom design.

※ Notes on sample handling

  • It does not respond to compensation of any accident or brekage, etc by having used these samples.
  • The product using this sample cannot be sold.
  • This sample is not what guaranteed heat resistance and durability.

※Caution

  • The use under unusual environment is not taken into consideration.
    • Inside of liquids, such as water, oil, a medical fluid, and an organic solvent.
    • Environment with much corrosive gas, such as salt air, chloride gas, sulfuration gas, ammonia gas, etc.
    • Environment with much ESD or strong electromagnetic wave.
    • Dew condensation environment
  • A measuring result may become unstable by surrounding magnetic materials (a steel rod, a steel desk, a steel rod, a steel desk, a printed circuit board with nickel base plating, etc.) and geomagnetism.
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