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PDF A1373 Data sheet ( Hoja de datos )
| Número de pieza | A1373 | |
| Descripción | (A1373 / A1374) High Precision Output Pin Programmable Linear Hall Effect Sensors | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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A1373 and A1374
High Precision, Output Pin Programmable
Linear Hall Effect Sensors
Features and Benefits
▪ Output pin programming
▪ Field-programmable for optimal application integration
▪ Selectable coarse and fine gain and quiescent output voltage
▪ Selectable sensitivity temperature coefficient
▪ Selectable output clamp voltage level, including no-
clamp (rail-to-rail)
▪ Selectable output polarity
▪ Unipolar or bipolar operation
▪ Ratiometric sensitivity, clamps, and quiescent output voltage
▪ Chopper-stabilized Hall technique
▪ Wide operating temperature range
▪ On-chip regulator for over/under voltage protection
▪ On-chip regulator provides EMI robustness
▪ Wide lead-spacing with KB package
Description
TheA1373 andA1374 high precision linear Hall effect sensors
are sensitive, temperature stable, linear devices with externally
programmable features. This device family incorporates a
chopper-stabilized amplifier, voltage regulator, programming
logic, and an output amplifier on a single IC. The patented
dynamic offset cancellation used with a chopper-stabilization
technique provides extremely low offset and minimal
temperature drift.Ahigh frequency clock is used for chopping, to
ensure high frequency signal processing capability. TheA1373
and A1374 are ideal for use in automotive and industrial linear
position-sensing applications that require increased reliability
and accuracy over conventional contacting-potentiometer
solutions. Key applications include: throttle position sensors,
pedal position sensors, and suspension height sensors.
Package: 3 pin SIP (suffix KB)
The design and manufacturing flexibility of the A1373 and
A1374 complement the Allegro linear Hall effect family of
devices by offering programmable gain, quiescent offset voltage
for unipolar or bipolar operation, temperature coefficient,
clamps, and polarity. The device can be set up in a magnetic
circuit and programmed with a train of serial pulses via the
outputwww.DataSheet4U.com pin. Once the right combination of gain, quiescent
Not to scale
VCC
Pin 1
Continued on the next page…
Functional Block Diagram
Voltage
Regulator
To all subcircuits
A1373-DS, Rev. 8
Amp
Out
GND
Pin 2
Gain
Hall drive circuit
Temperature
Coefficient
Offset
Trim Control
VOUT
Pin 3
1 page  
A1373 and
A1374
High Precision, Output Pin Programmable
Linear Hall Effect Sensors
CHARACTERISTIC PARAMETERS (continued)
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max Units
SENSITIVITY TEMPERATURE COEFFICIENT PROGRAMMING over operating temperature range, VCC= 5.0 V, unless
otherwise noted
Sensitivity Temperature
Coefficient Range
Average Sensitivity
Temperature Coefficient Step
Size4,5,6
Sensitivity Temperature
Coefficient Programming Bits
TC
StepTC
–
Sensitivity T/C codes 0 to 11,
minimum (absolute) positive
temperature coefficient attainable
Sensitivity T/C codes 16 to 27,
minimum (absolute) negative
temperature coefficient attainable
TA = 150°C
– 0.07
– –0.016
– 0.01
–5
– %/°C
– %/°C
– %/°C
– Bit
ONE-TIME PROGRAMMING
Device Programming Lock Bit
–
–1
– Bit
RATIOMETRY over operating temperature range, VCC= 5.0 V, unless otherwise noted
Quiescent Voltage Error
RatVOUT(Q)
VCC at VOPERATING
– ±0.25 – %
Sensitivity Error
RatSENS
VCC at VOPERATING
– ±1.0 – %
Clamp Error
RatVOUTCLP VCC at VOPERATING
– ±1.5 – %
LINEARITY over operating temperature range, VCC= 5.0 V, unless otherwise noted
Positive Linearity Error
Lin+
VCC at VOPERATING
– ±0.5 – %
Negative Linearity Error
Lin–
VCC at VOPERATING
– ±0.5 – %
SYMMETRY over operating temperature range, VCC= 5.0 V, unless otherwise noted
Symmetry Error
Sym
VCC at VOPERATING – VCC
– ±0.35 – %
ADDITIONAL CHARACTERISTICS
Sensitivity Drift9
ΔSens
– – ±2 %
Package Thermal Resistance
1 layer PCB with copper limited to
RθJA
solder pads; see Allegro web site for
–
177
additional thermal information
– °C/W
FAULT CONDITIONS over operating temperature range, VCC= 5.0 V, unless otherwise noted
Shorted Output Wire
IOUTSHT
VOUT pin to VCC pin
VOUT pin to GND pin
– – 18 mA
––
4 mA
1 tPO does not include tCLP , specified in the Quiescent Programming section of this table.
2 Peak to peak value exceeded: 0.3% (6σ).
3 For A1373, no digital noise is present at the output.
4 Step size is larger than required for the specified range, to take into account manufacturing spread.
5 Individual code step sizes can be greater than 2× larger than the step size at each significant bit rollover.
6 Average fine code step size in a given range = (Output value at highest fine code in the range – Output value at code 0 of the range) / Total quantity of
steps (codes) in the range.
7 Values indicated are valid if any additional magnetic field does not exceed B(kG)= ±2 (V) / Sens (mv/G), after VOUTCLP is reached.
8 Program the Sensitivity T/C register before programming Sensitivity Coarse and Sensitivity Fine, due to a worst case shift of ±3% in sensitivity at 25°C
at the maximum values for Sensitivity T/C: Positive T/C and Sensitivity T/C: Negative T/C. The Programming Guidelines section in this document lists a
complete recommended order for programming individual values.
9Drift due to temperature cycling is due to package effects on the Hall transducer. The stress is reduced when the package is baked. However, it will
recover over time after removal from the bake.
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
5 Page 
A1373 and
A1374
High Precision, Output Pin Programmable
Linear Hall Effect Sensors
5
4
3
2
1
0
-50
Average Saturation Voltage
VOUT(sat)+
VOUT(sat)–
-25 0 25 50 75 100 125
Temperature (°C)
150
Average Clamp Values
5
4
10% High Clamp
3
10% Low Clamp
20% High Clamp
2
20% Low Clamp
1
0
-50 -25 0 25 50 75 100 125 150
Temperature (°C)
Allegro MicroSystems, Inc.
11
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet A1373.PDF ] | |
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