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Continuous-Time Ratiometric
Linear Hall Effect Sensors
A1301 and
A1302
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
DEVICE CHARACTERISTICS over operating temperature range, T
A
, and V
CC
= 5 V, unless otherwise noted
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Electrical Characteristics
Supply Voltage V
CC
Running, T
J
< 165°C 4.5 – 6 V
Supply Current I
CC
Output open – – 11 mA
Output Voltage
V
OUT(High)
I
SOURCE
= –1 mA, Sens = nominal 4.65 4.7 – V
V
OUT(Low)
I
SINK
= 1 mA, Sens = nominal – 0.2 0.25 V
Output Bandwidth BW – 20 – kHz
Power-On Time t
PO
V
CC(min)
to 0.95 V
OUT;
B = ±1400 G;
Slew rate = 4.5 V/μs to 4.5 V/100 ns
–35μs
Output Resistance R
OUT
I
SINK
≤ 1 mA, I
SOURCE
≥ –1 mA – 2 5 Ω
Wide Band Output Noise, rms V
OUTN
External output low pass filter ≤ 10 kHz;
Sens = nominal
– 150 – μV
Ratiometry
Quiescent Output Voltage Error
with respect to ΔV
CC
1
ΔV
OUTQ(V)
T
A
= 25°C – – ±3.0 %
Magnetic Sensitivity Error with
respect to ΔV
CC
2
ΔSens
(V)
T
A
= 25°C – – ±3.0 %
Output
Linearity Lin T
A
= 25°C – – ±2.5 %
Symmetry Sym T
A
= 25°C – – ±3.0 %
Magnetic Characteristics
Quiescent Output Voltage V
OUTQ
B = 0 G; T
A
= 25°C 2.4 2.5 2.6 V
Quiescent Output Voltage over
Operating Temperature Range
V
OUTQ(ΔT
A
)
B = 0 G 2.2 – 2.8 V
Magnetic Sensitivity Sens
A1301; T
A
= 25°C 2.0 2.5 3.0 mV/G
A1302; T
A
= 25°C 1.0 1.3 1.6 mV/G
Magnetic Sensitivity over
Operating Temperature Range
Sens
(ΔT
A
)
A1301 1.8 – 3.2 mV/G
A1302 0.85 – 1.75 mV/G
1
Refer to equation (4) in Ratiometric section on page 4.
2
Refer to equation (5) in Ratiometric section on page 4.