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ZMT31TA

P1-P3P4-P4
1
SEMICONDUCTORS
DESCRIPTION
The ZMT31 allows the contactless counting of the revolutions of a
rotating magnet which is mounted on the axis of a wheel. Zero output
voltages of the Wheatstones bridges are used as trigger signals. The
sense of rotation of the wheel is taken into account by comparing the
signal outputs of both Wheatstone bridges which are proportional to
sin2(␣) or sin2(␣+45⬚). The angle can be determined by evaluating these
signals. Alternatively it is possibleto use the voltage signals of four half
bridges which are trimmed on V
b/2
.
FEATURES
·
Measures the magnetic field hrot (> 50kA/m)
generated by a permanent magnet which rotates
over the sensor
·
Magneticfieldhrotparalleltothechipsurfacecauses
a sinusoidal output signal
·
Package : SM-8 (available on 12mm tape)
APPLICATION
·
Contactless counting of the revolutions of a rotating
magnet (watermeters etc.)
·
Contactless angular measurement
·
Automotive (pedal position etc.)
·
Contactless rotary switches
·
Contactless potentiometer
DEVICE MARKING
·
ZMT31
ZMT31
ISSUE 4 - JUNE 2004
ANGLE SENSOR
1
4
2
3
8
5
7
6
Bridge1: pin 1: -V
O
pin 5: +VO
pin 8: -V
B
(GND) pin 4: +VB
Bridge 2: pin 2: -V
O
pin 6: +VO
pin 7: -V
B
(GND) pin 3: +VB
V
O
- output voltage V
B
- supply voltage
DEVICE REEL
SIZE
TAPE
WIDTH
QUANTITY
PER REEL
ZMT31TA
7
12mm 1000
ZMT31TC
13
12mm 4000
ORDERING INFORMATION
S
M
8
ZMT31
SEMICONDUCTORS
ISSUE 4 - JUNE 2004
2
PARAMETER SYMBOL LIMIT UNIT
Supply voltage V
B
5V
Total power dissipation P
tot
120 mW
Operating temperature range T
amb
-25 to +130 ⬚C
Storage temperature range T
stg
-40 to +130 ⬚C
Sensor chip alignment error ␣
e
ⱕ2 ⬚
PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST
CONDITIONS
Bridge resistance R
br
2.0 3.0 4.0 k⍀
Offset voltage V
Off
/V
B
-2.0 +2.0 mV/V bridge 1: ␣=45⬚;
bridge 2: ␣=0⬚
Sensitivity S
␣
0.2 (mV/V)/⬚ bridge 1: ␣=0⬚;
bridge 2: ␣=45⬚
Half bridge symmetry (V
S
/2-V
O
)/V
B
-2.0 +2.0 mV/V bridge 1: ␣=0⬚;
bridge 2: ␣=45⬚
Output voltage range
(|Vmax|+|Vmin|) /V
B
16 mV/V
Zero offset angle hysteresis ⌬␣ 2 ⬚
Temperature coefficient of
the bridge resistance -25⬚C
<T
amb
<100⬚C
T
CBR
0.25 0.30 0.35 %/K
Temperature coefficient of
the open circuit sensitivity
-25⬚C<T
amb
<100⬚C
T
CSV
-0.35 -0.30 -0.25 %/K V
B
= const.
T
CSI
-0.05 0 0.05 %/K I
B
= const
Temperature coefficient of
the offset voltage -25⬚C
<T
amb
<100⬚C
T
COFF
-3 +3 (␮V/V)/K
ZMT31
SEMICONDUCTORS
ISSUE 4 - JUNE 2004
3
Output voltage of both Wheatstone bridges versus angle ␣ of the magnetic field direction
P1-P3P4-P4

ZMT31TA

Mfr. #:
Buy ZMT31TA
Manufacturer:
Diodes Incorporated
Description:
Board Mount Hall Effect / Magnetic Sensors Magnetic Fld Sensor
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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