ACS724LMATR-30AB-T_技术文档

ACS724LMA

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC with

Common-Mode Field Rejection in High-Isolation SOIC16 Package

DESCRIPTION

FEATURES AND BENEFITS

• AEC-Q100 automotive qualified

TheAllegro^™ACS724LMAcurrentsensorICisaneconomical

andprecisesolutionforACorDCcurrentsensinginautomotive,

industrial,commercial,andcommunicationsystems.Thesmall

package is ideal for space-constrained applications while also

saving costs due to reduced board area. Typical applications

includeelectricvehicleson-boardchargers, motorcontrol,load

detection and management, switched-mode power supplies,

and overcurrent fault protection.

• Differential Hall sensing rejects common-mode fields

• Patented integrated digital temperature compensation

circuitry allows for near closed loop accuracy over

temperature in an open loop sensor

• UL60950-1 (ed. 2) certification (pending)

□ Dielectric Strength Voltage = 4.8 kV_RMS

□ Basic Isolation Working Voltage = 1097 V_RMS

□ Reinforced Isolation Working Voltage = 565 V_RMS

• Industry-leading noise performance with greatly

improved bandwidth through proprietary amplifier and

filter design techniques

• Filter pin allows user to filter output for improved

resolution at lower bandwidth

• 0.85 mΩ primary conductor resistance for low power

loss and high inrush current withstand capability

• Low-profile SOIC16 package suitable for space-

constrained applications

The device consists of a precise, low-offset, linear Hall

sensor circuit with a copper conduction path located near the

surface of the die.Applied current flowing through this copper

conduction path generates a magnetic field which is sensed

by the integrated Hall IC and converted into a proportional

voltage. The current is sensed differentially in order to reject

common-mode fields, improving accuracy in magnetically

noisyenvironments.Theinherentdeviceaccuracyisoptimized

through the close proximity of the magnetic field to the Hall

transducer. A precise, proportional voltage is provided by the

low-offset,chopper-stabilizedBiCMOSHallIC,whichincludes

Allegro’spatenteddigitaltemperaturecompensation,resulting

inextremelyaccurateperformanceovertemperature.Theoutput

of the device has a positive slope when an increasing current

flows through the primary copper conduction path (from pins

1 through 4, to pins 5 through 8), which is the path used for

current sensing. The internal resistance of this conductive path

is 0.85 mΩ typical, providing low power loss.

• 4.5 to 5.5 V single supply operation

• Output voltage proportional to AC or DC current

• Factory-trimmed sensitivity and quiescent output voltage

for improved accuracy

• Chopper stabilization results in extremely stable

quiescent output voltage

• Nearly zero magnetic hysteresis

• Ratiometric output from supply voltage

PACKAGE: 16-pin SOICW (suffix MA)

The terminals of the conductive path are electrically isolated

from the sensor leads (pins 9 through 16). This allows the

ACS724LMAcurrent sensor IC to be used in high-side current

sense applications without the use of high-side differential

amplifiers or other costly isolation techniques.

Not to scale

Continued on the next page…

16

ACS724LMA NC

1

2

3

The ACS724LMA outputs an

IP+

15

analog signal, V_IOUT, that

changes proportionally with

GND

NC

+I_P

14

4

the bidirectional AC or DC

primary sensed current, I_P,

within the specified measure-

ment range.

13

12

11

10

9

FILTER

I_P

VIOUT

NC

C_F

5

6

7

C_L

1 nF

IP–

The FILTER pin can be used

to decrease the bandwidth in

order to optimize the noise

performance.

–I_P

VCC

NC

8

C_BYPASS

0.1 µF

Typical Application

ACS724LMA-DS, Rev. 6

MCO-0000322

March 9, 2018

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

DESCRIPTION (continued)

The ACS724LMA is provided in a low-profile surface-mount

SOIC16 package. The leadframe is plated with 100% matte tin,

whichiscompatiblewithstandardlead(Pb)freeprintedcircuitboard

assembly processes. Internally, the device is Pb-free. The device is

fully calibrated prior to shipment from the factory.

SELECTION GUIDE

Sens(Typ) at V_CC= 5 V

Part Number

I_PR(A)

T_A(°C)

Packing ^[1]

(mV/A)

100

66

ACS724LMATR-20AB-T

ACS724LMATR-30AB-T

ACS724LMATR-30AU-T

ACS724LMATR-50AB-T

ACS724LMATR-50AU-T

ACS724LMATR-65AB-T

±20

±30

30

132

40

–40 to 150

Tape and Reel, 1000 pieces per reel

±50

50

80

±65

30.75

^[1]Contact Allegro for additional packing options.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

2

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

Characteristic

Symbol

V_CC

Notes

Rating

6

Units

V

Supply Voltage

Reverse Supply Voltage

Output Voltage

V_RCC

–0.1

V

V_IOUT

V_RIOUT

T_A

V_CC+ 0.5

–0.1

V

Reverse Output Voltage

Operating Ambient Temperature

Junction Temperature

V

Range L

–40 to 150

165

°C

T_J(max)

Storage Temperature

T_stg

–65 to 165

°C

ISOLATION CHARACTERISTICS

Characteristic

Symbol

Notes

Rating

Unit

Tested ±5 pulses at 2/minute in compliance to IEC 61000-4-5

1.2 µs (rise) / 50 µs (width).

Dielectric Surge Strength Test Voltage

Dielectric Strength Test Voltage ^[1]

V_SURGE

10000

4800

V

Agency type-tested for 60 seconds per UL 60950-1

(edition 2). Production tested at 3000 V_RMSfor 1 second, in

accordance with UL 60950-1 (edition 2).

V_ISO

V_RMS

1550

1097

800

V_PK

V_RMSor VDC

V_PK

Maximum approved working voltage for basic (single) isolation

according to UL 60950-1 (edition 2).

Working Voltage for Basic Isolation ^[1]

V_WVBI

Maximum approved working voltage for reinforced isolation

according to UL 60950-1 (edition 2).

Working Voltage for Reinforced Isolation ^[1]

V_WVRI

565

7.5

V_RMSor VDC

mm

Clearance

Creepage

D_cl

D_cr

Minimum distance through air from IP leads to signal leads.

Minimum distance along package body from IP leads to signal

leads

8.2

mm

^[1]Certification pending.

THERMAL CHARACTERISTICS

Characteristic

Symbol

Test Conditions ^[2]

Value Units

Mounted on the Allegro 85-0738 evaluation board with 700 mm²of 4 oz.

copper on each side, connected to pins 1 and 2, and to pins 3 and 4, with

thermal vias connecting the layers. Performance values include the power

consumed by the PCB.

Package Thermal Resistance

(Junction to Ambient)

R_θJA

23

5

°C/W

Package Thermal Resistance

(Junction to Lead)

R_θJL

Mounted on the Allegro ASEK724 evaluation board.

^[2]Additional thermal information available on the Allegro website.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

3

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

V

CC

VCC

Master Current

Supply

To All Subcircuits

POR

Programming

Control

Hall

Current

Drive

C

0.1 µF

BYPASS

EEPROM and

Control Logic

Temperature

Sensor

Offset

Control

IP+

Sensitivity

Control

+

–

+

VIOUT

R

F(int)

–

IP–

GND

FILTER

C

F

Functional Block Diagram

Terminal List Table

16 NC

IP+

IP-

1

2

3

4

5

6

7

8

Number

1, 2, 3, 4

5, 6, 7, 8

Name

Description

15 GND

14 NC

IP+

IP-

Terminals for current being sensed; fused internally

13 FILTER

12 VIOUT

11 NC

No internal connection; recommended to be left unconnected in order to

maintain high creepage

9, 16

10

NC

VCC

NC

Device power supply terminal

IP-

No internal connection; recommened to connect to GND for the best ESD

performance

IP-

10 VCC

11, 14

IP-

9 NC

12

13

15

VIOUT

FILTER

GND

Analog output signal

Terminal for external capacitor that sets bandwidth

Signal ground terminal

Pinout Diagram

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

4

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

COMMON ELECTRICAL CHARACTERISTICS ^[1]: Valid through the full range of T_A= –40°C to 150°C and V_CC= 5 V,

unless otherwise speciﬁed

Characteristic

Symbol

V_CC

Test Conditions

Min.

4.5

–

Typ.

5

Max.

5.5

14

10

–

Units

V

Supply Voltage

Supply Current

I_CC

V_CCwithin V_CC(min) and V_CC(max)

VIOUT to GND

10

–

mA

nF

Output Capacitance Load

Output Resistive Load

C_L

–

R_L

VIOUT to GND

4.7

–

kΩ

mΩ

kΩ

dB

Primary Conductor Resistance

Internal Filter Resistance ^[2]

Common Mode Field Rejection Ratio

Primary Hall Coupling Factor

Secondary Hall Coupling Factor

Hall Plate Sensitivity Matching

Rise Time

R_IP

T_A= 25°C

0.85

1.7

40

4.5

0.5

±1

3

–

R_F(INT)

CMFRR

G1

–

Uniform external magnetic field

T_A= 25°C

–

G/A

%

G2

T_A= 25°C

–

Sens_MATCH

t_r

T_A= 25°C

–

I_P= I_P(max), T_A= 25°C, C_L= 1 nF

Small signal –3 dB, C_L= 1 nF

–

μs

Propagation Delay

t_pd

–

2

–

μs

Response Time

t_RESPONSE

BW

–

4

–

μs

Internal Bandwidth

–

120

–

kHz

Input-referenced noise density;

T_A= 25°C, C_L= 1 nF

µA_RMS/

√Hz

Noise Density

I_ND

–

450

–

Input-referenced noise; C_F= 4.7 nF,

C_L= 1 nF, BW = 18 kHz, T_A= 25°C

Noise

I_N

–

–1

–

60

–

1

–

mA_RMS

Nonlinearity

E_LIN

Through full range of I_P

%

–

SENS_RAT_

COEF

Sensitivity Ratiometry Coefficient

V

_CC= 4.5 to 5.5 V, T_A= 25°C

1.3

QVO_RAT_

COEF

Zero-Current Output Ratiometry Coefficient

Saturation Voltage ^[3]

–

1

–

V_OH

V_OL

R_L= 4.7 kΩ, T_A= 25°C

V_CC– 0.5

–

V

0.5

Output reaches 90% of steady-state

level, T_A= 25°C, I_P= I_PR(max) applied

Power-On Time

t_PO

–

80

–

μs

Shorted Output to Ground Current

Shorted Output to V_CCCurrent

I_SC(GND)

I_SC(VCC)

T_A= 25°C

–

3.3

45

–

mA

^[1]Device may be operated at higher primary current levels, I_P, ambient temperatures, T_A, and internal leadframe temperatures, provided the Maximum Junction Tempera-

ture, T_J(max), is not exceeded.

[2]

R

forms an RC circuit via the FILTER pin.

F(INT)

^[3]The sensor IC will continue to respond to current beyond the range of I_Puntil the high or low saturation voltage; however, the nonlinearity in this region will be worse than

through the rest of the measurement range.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

5

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

xLMATR-20AB PERFORMANCE CHARACTERISTICS: T_ARange L, valid at T_A= 40°C to 150°C, V_CC= 5 V,

unless otherwise speciﬁed

Characteristic

NOMINAL PERFORMANCE

Current Sensing Range

Sensitivity

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Units

I_PR

–20

–

20

–

A

Sens

I_PR(min)< I_P< I_PR(max)

100

mV/A

V_CC

0.5

×

Zero Current Output Voltage

V_IOUT(Q)

Bidirectional; I_P= 0 A

–

V

ACCURACY PERFORMANCE

I_P= I_PR(max), T_A= 25°C to 150°C

I_P= I_PR(max), T_A= –40°C to 25°C

–2.5

–6

±0.8

±2.7

2.5

6

%

Total Output Error ^[2]

E_TOT

TOTAL OUTPUT ERROR COMPONENTS ^[3]: E_TOT= E_SENS+ 100 × V_OE/(Sens × I_P)

T_A= 25°C to 150°C, measured at I_P= I_PR(max)

–2

±0.7

±2.6

±7

2

%

Sensitivity Error

Offset Voltage

E_SENS

T_A= –40°C to 25°C, measured at I_P= I_PR(max)

I_P= 0 A, T_A= 25°C to 150°C

–5.5

–15

–30

5.5

15

30

mV

V_OE

I_P= 0 A, T_A= –40°C to 25°C

±15

LIFETIME DRIFT CHARACTERISTICS ^[4]

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

–3

–5.5

–3.5

–6

±1

±3

±1

±3

–

3

%

Sensitivity Error Including

E_{sens_drift}

Lifetime Drift

5.5

3.5

6

%

Total Output Error Including

E_{tot_drift}

Lifetime Drift

%

–20

–30

20

30

mV

Offset Error Including Lifetime

Drift

E_{Off_Drift}

±20

^[1]Typical values with +/- are 3 sigma values.

^[2]Percentage of I_P, with I_P= I_PR(max).

^[3]A single part will not have both the maximum/minimum sensitivity error and maximum/minimum oﬀset voltage, as that would violate the maximum/minimum total output

error speciﬁcation. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.

^[4]Based on characterization data obtained during AEC-Q100 stress testing.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

6

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

xLMATR-30AB PERFORMANCE CHARACTERISTICS: T_ARange L, valid at T_A= 40°C to 150°C, V_CC= 5 V,

unless otherwise speciﬁed

Characteristic

NOMINAL PERFORMANCE

Current Sensing Range

Sensitivity

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Units

I_PR

–30

–

30

–

A

Sens

I_PR(min)< I_P< I_PR(max)

66

mV/A

V_CC

0.5

×

Zero Current Output Voltage

V_IOUT(Q)

Bidirectional; I_P= 0 A

–

V

ACCURACY PERFORMANCE

I_P= I_PR(max), T_A= 25°C to 150°C

I_P= I_PR(max), T_A= –40°C to 25°C

–2.5

–6

±0.8

±2.7

2.5

6

%

Total Output Error ^[2]

E_TOT

TOTAL OUTPUT ERROR COMPONENTS ^[3]: E_TOT= E_SENS+ 100 × V_OE/(Sens × I_P)

T_A= 25°C to 150°C, measured at I_P= I_PR(max)

–2

±0.7

±2.6

±7

2

%

Sensitivity Error

Offset Voltage

E_SENS

T_A= –40°C to 25°C, measured at I_P= I_PR(max)

I_P= 0 A, T_A= 25°C to 150°C

–5.5

–15

–30

5.5

15

30

mV

V_OE

I_P= 0 A, T_A= –40°C to 25°C

±15

LIFETIME DRIFT CHARACTERISTICS ^[4]

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

–3

–5.5

–3.5

–6

±1

±3

±1

±3

–

3

%

Sensitivity Error Including

E_{sens_drift}

Lifetime Drift

5.5

3.5

6

%

Total Output Error Including

E_{tot_drift}

Lifetime Drift

%

–20

–30

20

30

mV

Offset Error Including Lifetime

Drift

E_{Off_Drift}

±20

^[1]Typical values with +/- are 3 sigma values.

^[2]Percentage of I_P, with I_P= I_PR(max).

^[3]A single part will not have both the maximum/minimum sensitivity error and maximum/minimum oﬀset voltage, as that would violate the maximum/minimum total output

error speciﬁcation. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.

^[4]Based on characterization data obtained during AEC-Q100 stress testing.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

7

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

xLMATR-30AU PERFORMANCE CHARACTERISTICS: T_ARange L, valid at T_A= 40°C to 150°C, V_CC= 5 V,

unless otherwise speciﬁed

Characteristic

NOMINAL PERFORMANCE

Current Sensing Range

Sensitivity

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Units

I_PR

0

–

30

–

A

Sens

I_PR(min)< I_P< I_PR(max)

132

mV/A

V_CC

0.1

×

Zero Current Output Voltage

V_IOUT(Q)

Unidirectional; I_P= 0 A

–

V

ACCURACY PERFORMANCE

I_P= I_PR(max), T_A= 25°C to 150°C

I_P= I_PR(max), T_A= –40°C to 25°C

–2.5

–6

±0.7

±2.5

2.5

6

%

Total Output Error ^[2]

E_TOT

TOTAL OUTPUT ERROR COMPONENTS ^[3]: E_TOT= E_SENS+ 100 × V_OE/(Sens × I_P)

T_A= 25°C to 150°C, measured at I_P= I_PR(max)

–2

±0.7

±2.5

±7

2

%

Sensitivity Error

Offset Voltage

E_SENS

T_A= –40°C to 25°C, measured at I_P= I_PR(max)

I_P= 0 A, T_A= 25°C to 150°C

–5.5

–15

–30

5.5

15

30

mV

V_OE

I_P= 0 A, T_A= –40°C to 25°C

±20

LIFETIME DRIFT CHARACTERISTICS ^[4]

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

–3

–5.5

–3.5

–6

±1

±3

±1

±3

–

3

%

Sensitivity Error Including

E_{sens_drift}

Lifetime Drift

5.5

3.5

6

%

Total Output Error Including

E_{tot_drift}

Lifetime Drift

%

–20

–30

20

30

mV

Offset Error Including Lifetime

Drift

E_{Off_Drift}

±20

^[1]Typical values with +/- are 3 sigma values.

^[2]Percentage of I_P, with I_P= I_PR(max).

^[3]A single part will not have both the maximum/minimum sensitivity error and maximum/minimum oﬀset voltage, as that would violate the maximum/minimum total output

error speciﬁcation. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.

^[4]Based on characterization data obtained during AEC-Q100 stress testing.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

8

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

xLMATR-50AB PERFORMANCE CHARACTERISTICS: T_ARange L, valid at T_A= 40°C to 150°C, V_CC= 5 V,

unless otherwise speciﬁed

Characteristic

NOMINAL PERFORMANCE

Current Sensing Range

Sensitivity

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Units

I_PR

–50

–

50

–

A

Sens

I_PR(min)< I_P< I_PR(max)

40

mV/A

V_CC

0.5

×

Zero Current Output Voltage

V_IOUT(Q)

Bidirectional; I_P= 0 A

–

V

ACCURACY PERFORMANCE

I_P= I_PR(max), T_A= 25°C to 150°C

I_P= I_PR(max), T_A= –40°C to 25°C

–2.5

–6

±1

±3

2.5

6

%

Total Output Error ^[2]

E_TOT

TOTAL OUTPUT ERROR COMPONENTS ^[3]: E_TOT= E_SENS+ 100 × V_OE/(Sens × I_P)

T_A= 25°C to 150°C, measured at I_P= I_PR(max)

–2

±1

2

%

Sensitivity Error

Offset Voltage

E_SENS

T_A= –40°C to 25°C, measured at I_P= I_PR(max)

I_P= 0 A, T_A= 25°C to 150°C

–5.5

–15

–30

±2.8

±5

5.5

15

30

mV

V_OE

I_P= 0 A, T_A= –40°C to 25°C

±20

LIFETIME DRIFT CHARACTERISTICS ^[4]

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

–3

–5.5

–3.5

–6

±1

±3

±1

±3

–

3

%

Sensitivity Error Including

E_{sens_drift}

Lifetime Drift

5.5

3.5

6

%

Total Output Error Including

E_{tot_drift}

Lifetime Drift

%

–20

–30

20

30

mV

Offset Error Including Lifetime

Drift

E_{Off_Drift}

±20

^[1]Typical values with +/- are 3 sigma values.

^[2]Percentage of I_P, with I_P= I_PR(max).

^[3]A single part will not have both the maximum/minimum sensitivity error and maximum/minimum oﬀset voltage, as that would violate the maximum/minimum total output

error speciﬁcation. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.

^[4]Based on characterization data obtained during AEC-Q100 stress testing.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

9

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

xLMATR-50AU PERFORMANCE CHARACTERISTICS: T_ARange L, valid at T_A= 40°C to 150°C, V_CC= 5 V,

unless otherwise speciﬁed

Characteristic

NOMINAL PERFORMANCE

Current Sensing Range

Sensitivity

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Units

I_PR

0

–

50

–

A

Sens

I_PR(min)< I_P< I_PR(max)

80

mV/A

V_CC

0.1

×

Zero Current Output Voltage

V_IOUT(Q)

Unidirectional; I_P= 0 A

–

V

ACCURACY PERFORMANCE

I_P= I_PR(max), T_A= 25°C to 150°C

I_P= I_PR(max), T_A= –40°C to 25°C

–2.5

–6

±1

±3

2.5

6

%

Total Output Error ^[2]

E_TOT

TOTAL OUTPUT ERROR COMPONENTS ^[3]: E_TOT= E_SENS+ 100 × V_OE/(Sens × I_P)

T_A= 25°C to 150°C, measured at I_P= I_PR(max)

–2

±1

2

%

Sensitivity Error

Offset Voltage

E_SENS

T_A= –40°C to 25°C, measured at I_P= I_PR(max)

I_P= 0 A, T_A= 25°C to 150°C

–5.5

–15

–30

±2.8

±5

5.5

15

30

mV

V_OE

I_P= 0 A, T_A= –40°C to 25°C

±20

LIFETIME DRIFT CHARACTERISTICS ^[4]

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

–3

–5.5

–3.5

–6

±1

±3

±1

±3

–

3

%

Sensitivity Error Including

E_{sens_drift}

Lifetime Drift

5.5

3.5

6

%

Total Output Error Including

E_{tot_drift}

Lifetime Drift

%

–20

–30

20

30

mV

Offset Error Including Lifetime

Drift

E_{Off_Drift}

±20

^[1]Typical values with +/- are 3 sigma values.

^[2]Percentage of I_P, with I_P= I_PR(max).

^[3]A single part will not have both the maximum/minimum sensitivity error and maximum/minimum oﬀset voltage, as that would violate the maximum/minimum total output

error speciﬁcation. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.

^[4]Based on characterization data obtained during AEC-Q100 stress testing.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

10

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

xLMATR-65AB PERFORMANCE CHARACTERISTICS: T_ARange L, valid at T_A= 40°C to 150°C, V_CC= 5 V,

unless otherwise speciﬁed

Characteristic

NOMINAL PERFORMANCE

Current Sensing Range

Sensitivity

Symbol

Test Conditions

Min.

Typ. ^[1]

Max.

Units

I_PR

–65

–

65

–

A

Sens

I_PR(min)< I_P< I_PR(max)

30.75

mV/A

V_CC

0.5

×

Zero Current Output Voltage

V_IOUT(Q)

Bidirectional; I_P= 0 A

–

V

ACCURACY PERFORMANCE

I_P= I_PR(max), T_A= 25°C to 150°C

I_P= I_PR(max), T_A= –40°C to 25°C

–2.5

–6

±1

±3

2.5

6

%

Total Output Error ^[2]

E_TOT

TOTAL OUTPUT ERROR COMPONENTS ^[3]: E_TOT= E_SENS+ 100 × V_OE/(Sens × I_P)

T_A= 25°C to 150°C, measured at I_P= I_PR(max)

–2

±1

2

%

Sensitivity Error

Offset Voltage

E_SENS

T_A= –40°C to 25°C, measured at I_P= I_PR(max)

I_P= 0 A, T_A= 25°C to 150°C

–5.5

–15

–30

±2.8

±5

5.5

15

30

mV

V_OE

I_P= 0 A, T_A= –40°C to 25°C

±20

LIFETIME DRIFT CHARACTERISTICS ^[4]

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

T_A= 25°C to 150°C

T_A= –40°C to 25°C

–3

–5.5

–3.5

–6

±1

±3

±1

±3

–

3

%

Sensitivity Error Including

E_{sens_drift}

Lifetime Drift

5.5

3.5

6

%

Total Output Error Including

E_{tot_drift}

Lifetime Drift

%

–20

–30

20

30

mV

Offset Error Including Lifetime

Drift

E_{Off_Drift}

±20

^[1]Typical values with +/- are 3 sigma values.

^[2]Percentage of I_P, with I_P= I_PR(max).

^[3]A single part will not have both the maximum/minimum sensitivity error and maximum/minimum oﬀset voltage, as that would violate the maximum/minimum total output

error speciﬁcation. Also, 3 sigma distribution values are combined by taking the square root of the sum of the squares. See Application Information section.

^[4]Based on characterization data obtained during AEC-Q100 stress testing.

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

11

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

CHARACTERISTIC PERFORMANCE

xLMATR-20AB

Offset Voltage vs. Temperature

Zero Current Output Voltage vs. Temperature

25

20

15

10

5

2525

2520

2515

2510

2505

2500

2495

2490

2485

2480

2475

0

-5

-10

-15

-20

-25

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Sensitivity Error vs. Temperature

Sensitivity vs. Temperature

5

4

105

104

103

102

101

100

99

3

2

1

0

-1

-2

-3

-4

-5

98

97

96

95

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Linearity Error vs. Temperature

Total Error vs. Temperature

1.5

1.0

5

4

3

2

0.5

1

0.0

0

-1

-2

-3

-4

-5

-0.5

-1.0

-1.5

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

+3 Sigma

Average

-3 Sigma

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

12

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

CHARACTERISTIC PERFORMANCE

xLMATR-30AB

Offset Voltage vs. Temperature

Zero Current Output Voltage vs. Temperature

20

15

10

5

2520

2515

2510

2505

2500

2495

2490

2485

2480

0

-5

-10

-15

-20

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Sensitivity Error vs. Temperature

Sensitivity vs. Temperature

4

3

70

69

68

67

66

65

64

63

62

2

1

0

-1

-2

-3

-4

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Linearity Error vs. Temperature

Total Error vs. Temperature

1.0

0.5

4

3

2

1

0.0

0

-1

-2

-3

-4

-0.5

-1.0

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

+3 Sigma

Average

-3 Sigma

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

13

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

CHARACTERISTIC PERFORMANCE

xLMATR-30AU

Offset Voltage vs. Temperature

Zero Current Output Voltage vs. Temperature

20

15

10

5

525

520

515

510

505

500

495

490

485

480

475

0

-5

-10

-15

-20

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Sensitivity Error vs. Temperature

Sensitivity vs. Temperature

3

2

136

135

134

133

132

131

130

129

128

1

0

-1

-2

-3

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Linearity Error vs. Temperature

Total Error vs. Temperature

1.0

0.5

3

2

1

0.0

0

-1

-2

-3

-0.5

-1.0

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

+3 Sigma

Average

-3 Sigma

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

14

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

CHARACTERISTIC PERFORMANCE

xLMATR-50AB

Offset Voltage vs. Temperature

Zero Current Output Voltage vs. Temperature

15

10

5

2520

2515

2510

2505

2500

2495

2490

2485

2480

0

-5

-10

-15

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Sensitivity Error vs. Temperature

Sensitivity vs. Temperature

4

3

42

41

40

39

2

1

0

-1

-2

-3

-4

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Linearity Error vs. Temperature

Total Error vs. Temperature

1.0

0.5

4

3

2

1

0.0

0

-1

-2

-3

-4

-0.5

-1.0

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

+3 Sigma

Average

-3 Sigma

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

15

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

CHARACTERISTIC PERFORMANCE

xLMATR-50AU

Offset Voltage vs. Temperature

Zero Current Output Voltage vs. Temperature

20

15

10

5

520

515

510

505

500

495

490

485

480

0

-5

-10

-15

-20

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Sensitivity Error vs. Temperature

Sensitivity vs. Temperature

4

3

84

83

82

81

80

79

78

77

76

2

1

0

-1

-2

-3

-4

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Linearity Error vs. Temperature

Total Error vs. Temperature

1.0

4

3

0.5

0.0

2

1

0

-1

-2

-3

-4

-0.5

-1.0

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

+3 Sigma

Average

-3 Sigma

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

16

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

CHARACTERISTIC PERFORMANCE

xLMATR-65AB

Offset Voltage vs. Temperature

Zero Current Output Voltage vs. Temperature

15

10

5

2520

2515

2510

2505

2500

2495

2490

2485

2480

0

-5

-10

-15

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Sensitivity Error vs. Temperature

Sensitivity vs. Temperature

4

3

32

31

30

29

2

1

0

-1

-2

-3

-4

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

Nonlinearity vs. Temperature

Total Error vs. Temperature

1

0.5

0

4

3

2

1

0

-1

-2

-3

-4

-0.5

-1

-50

0

50

100

150

-50

0

50

100

150

Temperature (°C)

+3 Sigma

Average

-3 Sigma

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

17

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

DEFINITIONS OF ACCURACY CHARACTERISTICS

sensitivity error, and at relatively low currents, E_TOTwill be mostly

due to Offset Voltage (V_OE). In fact, at I_P= 0, E_TOTapproaches

infinity due to the offset. This is illustrated in Figure 1 and Figure 2.

Figure 1 shows a distribution of output voltages versus I_Pat 25°C

and across temperature. Figure 2 shows the corresponding E_TOT

versus I_P.

Sensitivity (Sens)

The change in sensor IC output in response to a 1A change

through the primary conductor. The sensitivity is the product

of the magnetic coupling factor (G/A) (1 G = 0.1 mT) and the

linear IC amplifier gain (mV/G). The linear IC amplifier gain is

programmed at the factory to optimize the sensitivity (mV/A) for

the full-scale current of the device.

Accuracy Across

Temperature

Increasing

V

(V)

IOUT

Nonlinearity (E_LIN

)

Accuracy at

25°C Only

The nonlinearity is a measure of how linear the output of the sen-

sor IC is over the full current measurement range. The nonlinear-

ity is calculated as:

Ideal V

IOUT

Accuracy Across

Temperature

Accuracy at

25°C Only

V

_IOUT(I_PR(max)) – V_IOUT(Q)

× 100 (%)

1–

E_LIN

=

{

[

[ {

2 × V_IOUT(I_PR(max)/2) – V_IOUT(Q)

I

(min)

PR

+I (A)

P

V

IOUT(Q)

where V_IOUT(I_PR(max)) is the output of the sensor IC with the

maximum measurement current flowing through it and

V_IOUT(I_PR(max)/2) is the output of the sensor IC with half of the

maximum measurement current flowing through it.

–I (A)

P

Full Scale I

P

I (max)

PR

Zero Current Output Voltage (V

)

0 A

IOUT(Q)

The output of the sensor when the primary current is zero. For

a unipolar supply voltage, it nominally remains at 0.5 × V_CCfor

a bidirectional device and 0.1 × V_CCfor a unidirectional device.

Accuracy at

25°C Only

Decreasing

(V)

V

Accuracy Across

Temperature

IOUT

For example, in the case of a bidirectional output device, V_CC

=

Figure 1: Output Voltage versus Sensed Current

5.0 V translates into V_IOUT(Q)= 2.50 V. Variation in V_IOUT(Q)can

be attributed to the resolution of the Allegro linear IC quiescent

voltage trim and thermal drift.

+E

TOT

Offset Voltage (V_OE)

The deviation of the device output from its ideal quiescent value

of 0.5 × V_CC(bidirectional) or 0.1 × V_CC(unidirectional) due to

nonmagnetic causes. To convert this voltage to amperes, divide

by the device sensitivity, Sens.

Across Temperature

25°C Only

Total Output Error (E_TOT

)

The difference between the current measurement from the sensor

IC and the actual current (I_P), relative to the actual current. This

is equivalent to the difference between the ideal output voltage

and the actual output voltage, divided by the ideal sensitivity,

relative to the current flowing through the primary conduction

path:

–I

P

+I

P

V

_{IOUT_ideal}(I_P) – V_IOUT(I_P)

E_TOT(I_P) =

× 100 (%)

–E

TOT

Sens_ideal(I_P)

× I_P

The Total Output Error incorporates all sources of error and is a

function of I_P. At relatively high currents, E_TOTwill be mostly due to

Figure 2: Total Output Error versus Sensed Current

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

18

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

APPLICATION INFORMATION

Here, E_SENSand V_OEare the ±3 sigma values for those error

terms. If there is an average sensitivity error or average offset

voltage, then the average Total Error is estimated as:

Estimating Total Error versus Sensed Current

The Performance Characteristics tables give distribution

(±3 sigma) values for Total Error at I_PR(max); however, one often

wants to know what error to expect at a particular current. This

can be estimated by using the distribution data for the compo-

nents of Total Error, Sensitivity Error, and Offset Voltage. The

±3 sigma value for Total Error (E_TOT) as a function of the sensed

current (I_P) is estimated as:

100 × V_OE

AVG

E_TOT(I_P) = E_SENS

+

AVG

Sens × I_P

The resulting total error will be a sum of E_TOTand E_{TOT_AVG}

.

Using these equations and the 3 sigma distributions for Sensitiv-

ity Error and Offset Voltage, the Total Error versus sensed current

(I_P) is shown here for the ACS724LMATR-20AB. As expected,

as one goes towards zero current, the error in percent goes

towards infinity due to division by zero.

2

100 × V_OE

(_{Sens × I})

2

E_TOT(I_P) = E_SENS

+

P

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

19

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

DEFINITIONS OF DYNAMIC RESPONSE CHARACTERISTICS

Power-On Time (t_PO)

V

CC

V

(typ)

CC

When the supply is ramped to its operating voltage, the device

requires a finite time to power its internal components before

responding to an input magnetic field.

V

IOUT

90% V

IOUT

Power-On Time (t_PO) is defined as the time it takes for the output

voltage to settle within ±10% of its steady-state value under an

applied magnetic field, after the power supply has reached its

minimum specified operating voltage (V_CC(min)) as shown in the

chart at right (refer to Figure 3).

V

CC

(min)

t

PO

t

1

2

t = time at which power supply reaches

1

minimum specified operating voltage

t = time at which output voltage settles

2

within ±10% of its steady state value

under an applied magnetic field

Rise Time (t_r)

The time interval between: a) when the sensor IC reaches 10%

of its full-scale value; and b) when it reaches 90% of its full-

scale value (refer to Figure 4). The rise time to a step response is

used to derive the bandwidth of the current sensor IC, in which

ƒ(–3 dB) = 0.35/t_r. Both t_rand t_RESPONSEare detrimentally

affected by eddy current losses observed in the conductive IC

ground plane.

0

t

Figure 3: Power-On Time

Primary Current

(%)

90

V

IOUT

Propagation Delay (t_pd)

Rise Time, t

r

20

10

0

The propagation delay is measured as the time interval between:

a) when the primary current signal reaches 20% of its final value,

and b) when the device reaches 20% of its output corresponding

to the applied current (refer to Figure 4).

t

Propagation Delay, t

pd

Figure 4: Rise Time and Propagation Delay

Response Time (t_RESPONSE

)

The time interval between: a) when the primary current signal

reaches 90% of its final value, and b) when the device reaches

90% of its output corresponding to the applied current (refer to

Figure 5).

Primary Current

(%)

90

V

IOUT

Response Time, t

RESPONSE

0

t

Figure 5: Response Time

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

20

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

NOT TO SCALE

All dimensions in millimeters.

15.75

9.54

1.27

0.65

Package Outline

Slot in PCB to maintain >8 mm creepage

once part is on PCB

2.25

7.25

1.27

3.56

17.27

Current

In

Current

Out

Perimeter holes for stitching to the other,

matching current trace design, layers of

the PCB for enhanced thermal capability.

21.51

Figure 6: High-Isolation PCB Layout

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

21

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

PACKAGE OUTLINE DRAWING

For Reference Only – Not for Tooling Use

(Reference MS-013AA)

NOT TO SCALE

Dimensions in millimeters

Dimensions exclusive of mold ﬂash, gate burrs, and dambar protrusions

Exact case and lead conﬁguration at supplier discretion within limits shown

8°

10.30 0.20

0°

16

0.33

0.20

7.50 0.10

10.30 0.33

A

1.27

0.40

1.40 REF

1

2

Branded Face

0.25 BSC

SEATING PLANE

16X

CC

GAUGE PLANE

2.65 MAX

0.10

C

SEATING

PLANE

0.30

0.10

1.27 BSC

0.51

0.31

1.27

0.65

16

NNNNNNN

LLLLLLLL

2.25

1

B

Standard Branding Reference View

L

9.50

N = Device part number

= Assembly Lot Number, first eight characters

A

Terminal #1 mark area

B

C

Branding scale and appearance at supplier discretion

1

2

Reference land pattern layout (reference IPC7351 SOIC127P600X175-8M);

all pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary

to meet application process requirements and PCB layout tolerances

C

PCB Layout Reference View

Figure 7: Package MA, 16-Pin SOICW

Allegro MicroSystems, LLC

115 Northeast Cutoﬀ

22

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Automotive Grade, High-Accuracy, Hall-Effect-Based Current Sensor IC

with Common-Mode Field Rejection in High-Isolation SOIC16 Package

ACS724LMA

Revision History

Number

Date

Description

–

1

October 16, 2017

October 31, 2017

Initial release

Updated Lifetime Drift Characteristics (pages 6-10)

Added Sensitivity Ratiometry Coefficient and Zero-Current Output Ratiometry Coefficient to Electrical

Characteristics table (page 5).

2

November 27, 2017

3

4

5

6

January 8, 2018

January 12, 2018

January 22, 2018

March 9, 2018

Corrected certification status (page 1 and 3)

Added Dielectric Surge Strength Test Voltage to Isolation Characteristics table (page 3).

Added Common Mode Field Rejection Ratio characteristic (page 5).

Added -65AB part option.

Allegro MicroSystems, LLC reserves the right to make, from time to time, such departures from the detail specifications as may be required to

permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that

the information being relied upon is current.

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of

Allegro’s product can reasonably be expected to cause bodily harm.

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型号：	ACS724LMATR-30AB-T
厂家：	ALLEGRO MICROSYSTEMS
描述：	Hall Effect Sensor, 信息通信管理输出元件传感器换能器
文件：	总23页 (文件大小：734K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ACS724LMATR-30AB-T [ALLEGRO]

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