A1326LLHLT-T Allegro Microsystems Inc, A1326LLHLT-T Datasheet - Page 5

• Manufacturer Part Number: A1326LLHLT-T
• Description: Low Noise Linear Hall Effect W/Analog Output
• Manufacturer: Allegro Microsystems Inc
• Series: -r
• Type: Linear - Ratiometricr

Specifications of A1326LLHLT-T

• Sensing Range: 2.375mV/G ~ 2.625mV/G
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 9mA
• Current - Output (max): 10mA
• Output Type: Digital, Open Drain
• Features: High Accuracy
• Operating Temperature: -40°C ~ 150°C
• Package / Case: SOT-23W
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

T
after temperature cycling T
back to up 25°C.
Linearity Sensitivity Error The 132x is designed to provide
linear output in response to a ramping applied magnetic field.
Consider two magnetic fields, B1 and B2. Ideally the sensitivity
of a device is the same for both fields for a given supply voltage
and temperature. Linearity sensitivity error is present when there
is a difference between the sensitivities measured at B1 and B2.
Linearity Sensitivity Error is calculated separately for the positive
(LIN
earity Sensitivity Error (%) is measured and defined as:
and
where:
and B(++), B(+), B(– –), and B(–) are positive and negative mag-
netic fields with respect to the quiescent voltage output such that
|B(++)| > |B(+)| and |B(– –)| > |B(– )| .
A
= 25°C, and Sens
A1324, A1325,
ERR+
) and negative (LIN
and A1326
Lin
Lin
Lin
Sens
ERR+
ERR–
ERR
(25°C)1
Bx
= max(| Lin
=
=
=

 


 


 

1–
1–
|V
A
is the value of sensitivity at T
OUT(Bx)
up to 150°C, down to –40°C, and
ERR–
Sens
Sens
Sens
Sens
) applied magnetic fields. Lin-
ERR+
B(– –)
B(++)
B(+)
B(–)
B
– V
Linear Hall Effect Sensor ICs with Analog Output
X
| , |Lin
OUT(Q)

 


 

×
×
100%
100%
ERR–
|

 

| )
A
= 25°C
(7)
(8)
(9)
Symmetry Sensitivity Error The magnetic sensitivity of a
device is constant for any two applied magnetic fields of equal
magnitude and opposite polarities.
Symmetry Error (%), is measured and defined as:
where Sens
tive and negative magnetic fields such that |B(+)| = |B(–)|.
Ratiometry Error The A132x features a ratiometric output.
This means that the quiescent voltage output, V
sensitivity, Sens, and clamp voltages, V
are proportional to the supply voltage, V
the supply voltage increases or decreases by a certain percent-
age, each characteristic also increases or decreases by the same
percentage. Error is the difference between the measured change
in the supply voltage, relative to 5 V, and the measured change in
each characteristic.
The ratiometric error in quiescent voltage output, Rat
(%), for a given supply voltage, V
The ratiometric error in magnetic sensitivity, Rat
given supply voltage, V
Rat
Rat
VOUT(Q)
VOUT(Q)
Bx
Sym
is defined as in equation 9, and B(+), B(–) are posi-
=
=
ERR

 


 

1–
1–
V
=
OUT(Q)VCC
Sens

 

1–
CC
, is defined as:
V
Sens
Sens
VCC
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
V
CC
CC
B(+)
B(–)
Sens
CC
V
V
V
OUT(Q)5V

 

, is defined as:
×
5V
100%
CLPHIGH
CC

 

×
. In other words, when
100%

 

×
OUT(Q)
100%
and V
SENS
VOUT(Q)
(%), for a
, magnetic
CLPLOW
(12)
(13)
(11)
,
5