ALLEGRO A1373, A1374 User Manual

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Package KB, 3-pin SIP

1. VCC

2. GND

3. VOUT (Programming)

A1373 and A1374

High Precision, Output Pin Programmable

Linear Hall Effect Sensors

The A1373 and A1374 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. A high frequency clock is used for chopping, to ensure high frequency signal processing capability. The A1373 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.

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 output pin. Once the right combination of gain, quiescent output voltage, and temperature coefficient has been selected, the codes can be locked for one-time programming. In this manner, manufacturing tolerances can be reduced and the assembly process can be simplified.

These devices are available in the KB package, a 3-pin SIP (single inline package). The lead (Pb) free version has a 100% matte tin plated leadframe.

AB SO LUTE MAX I MUM RAT INGS

Supply Voltage, V Reverse-Supply Voltage, V Output Voltage Reverse-Output Voltage, V Output Current Source, I Sink, I Operating Temperature Ambient, T Ambient, T Maximum Junction, T Storage Temperature, T

When blowing fuses during device programming, a

voltage of 28 V may be applied to VOUT.

A1373-DS, Rev. 3

OUTSOURCE

OUTSINK

..........................................16 V

, V

OUT

.......................................... 10 mA

, Range E..................–40ºC to 85ºC

, Range L................–40ºC to 150ºC

........................ –16 V

RCC

....................................... 16 V

.....................–0.1 V

ROUT

................................... 3 mA

........................165ºC

J(max)

.................. –65ºC to 170ºC

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

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

A1373 and A1374

High Precision, Output Pin Programmable, Linear Hall Effect Sensors

Product Selection Guide

Part Number

A1373EKB –

A1373EKB–T Yes –40 to 85

A1373EKBTI –

A1373EKBTI–T Yes

A1373LKB –

A1373LKB–T Yes –40 to 150

A1373LKBTI –

A1373LKBTI–T Yes

A1374EKB –

A1374EKB–T Yes –40 to 85

A1374EKBTI –

A1374EKBTI–T Yes

A1374LKB –

A1374LKB–T Yes –40 to 150

A1374LKBTI –

A1374LKBTI–T Yes

*Contact Allegro for additional packing options

Pb-

free Packing*

Bulk, 500 pcs./bag

14.24-in. reel, 2000 pcs/reel

Bulk, 500 pcs./bag

14.24-in. reel, 2000 pcs/reel

Bulk, 500 pcs./bag

14.24-in. reel, 2000 pcs/reel

Bulk, 500 pcs./bag

14.24-in. reel, 2000 pcs/reel

Ambient, T

(ºC)

Functional Block Diagram

A1373-DS, Rev. 3

VCC

Pin 1

Cancellation

Dynamic Offset

Voltage

Regulator

To all subcircuits

Amp Out

Gain

Filter

Hall drive circuit

Temperature

Coefficient

Trim Control

GND Pin 2

Offset

VOUT

Pin 3

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

High Precision, Output Pin Programmable, Linear Hall Effect Sensors

CHARACTERISTIC PARAMETERS

Characteristic Symbol Test Conditions Min. Typ. Max Units

A1373 and A1374

ELECTRICAL CHARACTERISTICS

Supply Voltage V

Supply Current I

Reverse-Supply Current I

Power-On Time

Chopping Frequency f

over operating temperature range, VCC= 5.0 V, unless otherwise noted

RCC

Internal Bandwidth BW

OUTPUT CHARACTERISTICS

2,3

Noise

Output Capacitance Load C

Output Resistive Load R

over operating temperature range, VCC= 5.0 V, unless otherwise noted

LOAD

Phase Shift ΔΦ

OUT(Sat)HIGH

Output Voltage

OUT(Sat)LOW

Output Resistance R

OUT

MAGNETIC CHARACTERISTICS

Operation within specification,

< 165°C

4.5 5.0 5.5 V

– 8.2 10 mA

VCC = –16 V, TA = 25°C – – 16 mA

= 10 nF, 90% full scale V

LOAD

OUT

– – 300 μs

– 200 – kHz

A1373 A1374 – 20 – kHz

A1373

A1374 – 14 26 mV

Small signal -3 dB

peak-to-peak, C

LOAD

2.5 mV/G

> 1 nF,

– 2.5 – kHz

– 6 16 mV

VOUT pin to GND pin – – 10 nF

4700 – – Ω

A1373 Magnetic signal freq. = 100 Hz – 3 – (°)

A1374 Magnetic signal freq. = 1000 Hz – 3 – (°)

OUTSINK

B(kG) > (VCC–V I

OUTSOURCE

B(kG) < V

= 1.2 mA,

OUT(Q)

= 1.2 mA,

/ Sens (mV/G)

OUT(Q)

) / Sens (mV/G)

4.65 4.7 – V

– 0.2 0.25 V

– 1.5 – Ω

Magnetic Slew Rate SLR V / ms / Sens – 20 –

PRE-PROGRAMMING TARGET (Prior to coarse and fine trim) over operating temperature range, V

= 5.0 V, unless

otherwise noted

Pre-Programming Quiescent Output Voltage

Pre-Programming Sensitivity Sens

Pre-Programming Sensitivity Temperature Coefficient

INITIAL COARSE PROGRAMMING

Initial Coarse Quiescent Output Voltage

Initial Coarse Sensitivity

OUT(Q)PRE

PRE

B = 0 G, TA = 25°C 1.62 1.80 1.98 V

TA = 25°C 1.05 1.31 1.75 mV/G

TA relative to 25°C –0.016 0.05 0.104 %/°C

over operating temperature range, VCC= 5.0 V, unless otherwise noted

OUT(Q)INITLOWTA

OUT(Q)INITMID

OUT(Q)INITHIGHTA

Sens

INITLOW

Sens

INITMID

Sens

INITHIGHTA

= 25°C – 0.55 – V

Reference V

OUT(Q)PRE

––- –V

= 25°C – 3.25 – V

Reference Sens

PRE

– – – mV/G

TA = 25°C – 2.8 – mV/G

= 25°C – 5.5 – mV/G

Continued on the next page...

Allegro MicroSystems, Inc.

A1373-DS, Rev. 3

115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com

G/μs

A1373 and A1374

High Precision, Output Pin Programmable, Linear Hall Effect Sensors

CHARACTERISTIC PARAMETERS (continued)

Characteristic Symbol Test Conditions Min. Typ. Max Units

QUIESCENT OUTPUT VOLTAGE PROGRAMMING over operating temperature range, V

OUT(Q)LOW

Quiescent Output Voltage Range

Average Quiescent Output Voltage Step Size

4,5,6

Quiescent Output Voltage Programming Resolution

OUT(Q)MID

OUT(Q)HIGH

Step

Err

PROGVOUT(Q)

Quiescent Output Voltage Drift Over Operating Temperature

ΔV

Range

Quiescent Output Voltage

Programming Bits

10% Output Clamp Option

20% Output Clamp Option

Delay to Clamp t

SENSITIVITY PROGRAMMING

Sensitivity Range

Average Sensitivity Step Size

4,5,6

Sensitivity Programming Resolution

Sensitivity

Programming Bits

OUTCLP10HIGH

OUTCLP10LOW

OUTCLP20HIGH

OUTCLP20LOW

over operating temperature range, VCC= 5.0 V, unless otherwise noted

Sens

Step

Err

VOUT(Q)

OUT(Q)

–

CLP

LOW

MID

HIGH

SENSLOW

SENSMID

SENSHIGH

PROGSENS

–

B = 0 G, TA = 25°C

TA = 25°C 3.0 3.275 3.5 mV

Fine programming value selection

accuracy

= V

OUT(Q)

OUT(Q)LOW

= V

OUT(Q)MID

= V

OUT(Q)HIGH

Coarse (Range selection) – 2 – Bit

Fine (Value selection) – 9 – Bit

A1373

A1374 4.300 – 4.650 V

A1373

A1374 0.3 – 0.6 V

A1373

A1374 3.900 – 4.200 V

A1373

A1374 0.8 – 1.1 V

High-side output clamp

Low-side output clamp

High-side output clamp

Low-side output clamp

A1373 – – 2 μs A1374 – – 100 μs

TA = 25°C

Fine programming value selection accuracy

Coarse (Range selection) – 2 – Bit

Fine (Value selection) – 8 – Bit

POLARITY PROGRAMMING

Polarity

Programming Bit

– Negative Sensitivity – 1 – Bit

= 5.0 V, unless otherwise noted

0.7 – 1.9 V

2.0 – 3.2 V

3.5 – 4.5 V

–

±0.5 ×

Step

VOUT(Q)

–mV

– – ±40 mV

– – ±55 mV

4.350 – 4.565 V

0.4 – 0.6 V

3.925 – 4.125 V

0.9 – 1.1 V

1.75 – 2.8 mV/G

3.5 – 5.7 mV/G

7.0 – 11.25 mV/G

6 9.5 14 μV/G 12 18.7 28 μV/G 22 37.0 56 μV/G

–

±0.5 ×

Step

SENS

– μV/G

Continued on the next page...

A1373-DS, Rev. 3

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

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, V

= 5.0 V, unless

otherwise noted

Sensitivity T/C codes 0 to 11,

Sensitivity Temperature Coefficient Range

minimum (absolute) positive temperature coefficient attainable

Sensitivity T/C codes 16 to 27,

minimum (absolute) negative

–

0.07

–

0.016 – %/°C

–

%/°C

temperature coefficient attainable

Average Sensitivity Temperature Coefficient Step

4,5,

Size Sensitivity Temperature

Coefficient Programming Bits

Step

TA = 150°C

––

–

0.01

–

%/°C

– Bit

ONE-TIME PROGRAMMING

Device Programming Lock Bit

RATIOMETRY over operating temperature range, V

Quiescent Voltage Error Sensitivity Error

Clamp Error Rat

LINEARITY

over operating temperature range, VCC= 5.0 V, unless otherwise noted Positive Linearity Error Lin+ VCC at V Negative Linearity Error

SYMMETRY

over operating temperature range, VCC= 5.0 V, unless otherwise noted

Symmetry Error

ADDITIONAL CHARACTERISTICS

Sensitivity Drift

FAULT CONDITIONS over operating temperature range, V

Shorted Output Wire

tPO does not include t

Peak to peak value exceeded: 0.3% (6σ).

For A1373, no digital noise is present at the output.

Step size is larger than required for the specified range, to take into account manufacturing spread.

Individual code step sizes can be greater than 2× larger than the step size at each significant bit rollover.

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.

Values indicated are valid if any additional magnetic field does not exceed B(kG)= ±2 (V) / Sens (mv/G), after V

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.

Drift 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.

, specified in the Quiescent Programming sectio n of this table.

CLP

– – 1 – Bit

= 5.0 V, unless otherwise noted

Rat

VOUTCLP

VOUT(Q)

SENS

Lin–

Sym

VCC at V VCC at V VCC at V

VCC at V

OPERATING

– V

–

±0.25

±1.0 ±1.5

±0.5 ±0.5

±0.35 –

–%

ΔSens – – ±2 %

= 5.0 V, unless otherwise noted

OUTSHT

VOUT pin to VCC pin – – 18 mA

VOUT pin to GND pin – – 4 mA

is reached.

OUTCLP

A1373-DS, Rev. 3

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

A1373 and A1374

High Precision, Output Pin Programmable, Linear Hall Effect Sensors

Typical Characteristics

Temperature Coefficient Code Profile

TA = 150°C, Magnetically Back-Biased

3.4

3.2 Positive Programming Codes

OUT(Q)

= V

OUT(Q)PRE

, Sens = 5 mV/G

3.0

Negative Programming Codes

(V)

2.8

OUT(Q)

2.6

2.4

2.2

2.0

0 5 10 15 20 25 30

Sensitivity TC Code

Code Application

0 Initial code 1 – 11 Positive TC codes, use to increase TC value 12 – 15 [Unused, same effect as 4 – 7, respectively] 16 – 27 Negative TC codes, use to decrease TC value 28 – 31 [Unused, same effect as 20 – 23, respectively]

A1373-DS, Rev. 3

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

A1373 and A1374

High Precision, Output Pin Programmable, Linear Hall Effect Sensors

Sensitivity Temperature Coefficient Range, TC

0.25

0.20

0.15

0.10

0.05

TC (% / °C)

–0.05

–0.10

–0.15

–0.20

–0.25

Extended Range Not Guaranteed

Guaranteed Programmable Range

Extended Range Not Guaranteed

Units with a TC in the range TC

< TC < TC

(min)

PRE(max)

TC Range Before Programming

PRE(max)

before programming may not be programmable to the maximum attainable negative TC programming value

Typical maximum attainable positive TC programming range

(typ)

, for positive programming

, for negative programming

(typ)

PRE(min)

Typical maximum attainable negative TC programming range

A1373-DS, Rev. 3

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

+ 16 hidden pages

ALLEGRO A1373, A1374 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual