ACS758 Datasheet

ACS758xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based

Linear Current Sensor IC with 100 Current Conductor
FEATURES AND BENEFITS
Industry-leading noise performance through proprietary

amplifier and filter design techniques
Integrated shield greatly reduces capacitive coupling
from current conductor to die due to high dV/dt signals,
and prevents offset drift in high-side, high voltage
applications
Total output error improvement through gain and offset
trim over temperature
Small package size, with easy mounting capability
Monolithic Hall IC for high reliability
Ultra-low power loss:100 internal conductor
resistance
Galvanic isolation allows use in economical, high-side
current sensing in high voltage systems
AEC Q-100 qualified
Continued on the next page

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TV America
Certificate Number:
U8V 14 05 54214 028
UL Certified
File No.: E316429
DESCRIPTION
The Allegro ACS758 family of current sensor ICs provides

economical and precise solutions for AC or DC current sensing.
Typical applications include motor control, load detection and
management, power supply and DC-to-DC converter control,
inverter control, and overcurrent fault detection.
The device consists of a precision, low-offset linear Hall
circuit with a copper conduction path located near the die.
Applied current flowing through this copper conduction path
generates a magnetic field which the Hall IC converts into a
proportional voltage. Device accuracy is optimized through the
close proximity of the magnetic signal to the Hall transducer.
A precise, proportional output voltage is provided by the
low-offset, chopper-stabilized BiCMOS Hall IC, which is
programmed for accuracy at the factory.
High level immunity to current conductor dV/dt and stray
electric fields, offered by Allegro proprietary integrated shield
technology, provides low output voltage ripple and low offset
drift in high-side, high voltage applications.
The output of the device has a positive slope (>VCC/2) when an
increasing current flows through the primary copper conduction
path (from terminal 4 to terminal 5), which is the path used
for current sampling. The internal resistance of this conductive
path is 100 typical, providing low power loss.
PACKAGE: 5-PIN CB PACAKGE
The thickness of the copper conductor allows survival of the

device at high overcurrent conditions. The terminals of the
conductive path are electrically isolated from the signal leads
PFF
Leadform
PSF
Leadform
PSS
Leadform
Continued on the next page
+3.3 or 5 V
4
VCC
IP+
ACS758
IP
GND
5
1
CBYP
0.1 F
2
CF
IP
VIOUT
3
RF
VOUT
Application 1: The ACS758 outputs an analog signal, VOUT,

that varies linearly with the uni- or bi-directional AC or DC
primary sampled current, IP, within the range specified. CF is
for optimal noise management, with values that depend on
the application.
Typical Application
ACS758-DS, Rev. 9

ACS758xCB
FEATURES AND BENEFITS (CONTINUED)

3.0 to 5.5 V, single supply operation

120 kHz typical bandwidth
3 s output rise time in response to step input current
Output voltage proportional to AC or DC currents
Factory-trimmed for accuracy
Extremely stable output offset voltage
Nearly zero magnetic hysteresis
DESCRIPTION (CONTINUED)
(pins 1 through 3). This allows the ACS758 family of sensor ICs
to be used in applications requiring electrical isolation without the
use of opto-isolators or other costly isolation techniques.
The device is fully calibrated prior to shipment from the factory.
The ACS758 family is lead (Pb) free. All leads are plated with 100%
matte tin, and there is no Pb inside the package. The heavy gauge
leadframe is made of oxygen-free copper.
Selection Guide
Part Number1
Package
Sensitivity
Sens (Typ.)
(mV/A)
Current
Directionality
50
40.
Bidirectional
Primary Sampled
Current , IP
(A)
Terminals
Signal Pins
ACS758LCB-050B-PFF-T
Formed
Formed
ACS758LCB-050U-PFF-T
Formed
Formed
50
60.
Unidirectional
ACS758LCB-100B-PFF-T
Formed
Formed
100
20.
Bidirectional
ACS758LCB-100B-PSF-T
Straight
Formed
100
20.
Bidirectional
ACS758LCB-100U-PFF-T
Formed
Formed
100
40.
Unidirectional
ACS758KCB-150B-PFF-T
Formed
Formed
150
13.3
Bidirectional
ACS758KCB-150B-PSS-T
Straight
Straight
150
13.3
Bidirectional
ACS758KCB-150U-PFF-T
Formed
Formed
150
26.7
Unidirectional
ACS758ECB-200B-PFF-T
Formed
Formed
200
10.
Bidirectional
ACS758ECB-200B-PSF-T
Straight
Formed
200
10.
Bidirectional
ACS758ECB-200B-PSS-T
Straight
Straight
200
10.
Bidirectional
ACS758ECB-200U-PFF-T
Formed
Formed
200
20.
Unidirectional
TOP
(C)
Packing2
40 to 150
40 to 125
34 pieces
per tube
40 to 85
1Additional
leadform options available for qualified volumes.

2Contact Allegro for additional packing options.
Allegro MicroSystems, LLC

115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ACS758xCB

SPECIFICATIONS
Absolute Maximum Ratings

Characteristic
Rating
Units
VCC
Reverse Supply Voltage
VRCC
0.5
Forward Output Voltage
VIOUT
28
Forward Supply Voltage
Symbol
Notes
Reverse Output Voltage
VRIOUT
Output Source Current
IOUT(Source)
VIOUT to GND
IOUT(Sink)
VCC to VIOUT
Output Sink Current

Nominal Operating Ambient Temperature
Maximum Junction
Storage Temperature
0.5
mA
mA
Range E
40 to 85
Range K
40 to 125
Range L
40 to 150
TJ(max)
165
Tstg
65 to 165
Rating
Unit
4800
VAC
VDC or Vpk
TOP
Isolation Characteristics
Characteristic
Symbol
Notes
Dielectric Strength Test Voltage*
VISO
Agency type-tested for 60 seconds per

UL standard 60950-1, 2nd Edition
Working Voltage for Basic Isolation
VWFSI
For basic (single) isolation per UL standard 60950-1, 2nd

Edition
990
700
Vrms
VWFRI
For reinforced (double) isolation per UL standard 609501, 2nd Edition
636
VDC or Vpk
450
Vrms
Working Voltage for Reinforced Isolation
* Allegro does not conduct 60-second testing. It is done only during the UL certification process.

ACS758xCB

Thermal Characteristics may require derating at maximum conditions

Characteristic
Package Thermal Resistance
Symbol
Test Conditions*
Value
Unit
RJA
Mounted on the Allegro evaluation board with 2800mm2

(1400mm2 on component side and 1400mm2 on opposite
side) of 4 oz. copper connected to the primary leadframe
and with thermal vias connecting the copper layers.
Performance is based on current flowing through the
primary leadframe and includes the power consumed by
the PCB.
C/W
Notes
Rating
Units
TA = 25C, 1s duration, 1% duty cycle
1200
900
600
*Additional thermal information available on the Allegro website
Typical Overcurrent Capabilities1,2

Characteristic
Overcurrent
Symbol
IPOC
1Test
was done with Allegro evaluation board. The maximum allowed current is limited by TJ(max) only.
2For more overcurrent profiles, please see FAQ on the Allegro website, www.allegromicro.com.


ACS758xCB
+3.3 to 5 V
VCC
IP+
Gain
Amp
Filter
Dynamic Offset
Cancellation
To all subcircuits
VIOUT
Out
0.1 F
Gain
Temperature
Coefficient
Offset
Offset
Temperature
Coefficient
Trim Control
GND
IP
Functional Block Diagram
IP+
IP
Terminal List Table

3
VIOUT
GND
VCC
Pin-out Diagram
Number
Name
Description
VCC
Device power supply terminal
GND
Signal ground terminal
VIOUT
IP+
Terminal for current being sampled
IP
Terminal for current being sampled
Analog output signal


ACS758xCB
COMMON OPERATING CHARACTERISTICS1 valid at TOP = 40C to 150C and VCC = 5 V, unless otherwise
specified
Characteristic
Supply Voltage2
Symbol
Test Conditions
VCC
Min.
Typ.
Max.
Units
5.0
5.5
Supply Current
ICC
Output open
10
13.5
mA
Power-On Delay
tPOD
TA = 25C
10
Rise Time3
Propagation Delay Time3
Response Time
Internal
Bandwidth4
tr
tPROP
tRESPONSE
Measured as sum of tPROP and tr
120
kHz
Output Load Resistance
RLOAD(MIN)
VIOUT to GND
4.7
Output Load Capacitance
CLOAD(MAX)
VIOUT to GND
10
nF
TA = 25C
100
Over half-scale of Ip
99
100
101
Bidirectional variant, IP = 0 A, TA = 25C
VCC/2
0.6
100
Primary Conductor Resistance

Symmetry3
Quiescent Output Voltage5
Ratiometry3
BWi
IP step = 60% of IP+, 10% to 90% rise time, TA = 25C,

COUT = 0.47 nF
TA = 25C, COUT = 0.47 nF
RPRIMARY
ESYM
VIOUT(QBI)
VIOUT(QUNI)
VRAT
3 dB; TA = 25C, COUT = 0.47 nF
Unidirectional variant, IP = 0 A, TA = 25C, VIOUT(QUNI) is

ratiometric to VCC
VCC = 4.5 to 5.5 V
1Device
is factory-trimmed at 5 V, for optimal accuracy.

2Devices are programmed for maximum accuracy at 5.0 V V
CC levels. The device contains ratiometry circuits that accurately alter the 0 A Output Voltage and Sensitivity
level of the device in proportion to the applied VCC level. However, as a result of minor nonlinearities in the ratiometry circuit additional output error will result when VCC
varies from the 5 V VCC level. Customers that plan to operate the device from a 3.3 V regulated supply should contact their local Allegro sales representative regarding
expected device accuracy levels under these bias conditions.
3See Characteristic Definitions section of this datasheet.
4Calculated using the formula BW = 0.35 / t .
i
r
5V
IOUT(Q) may drift over the lifetime of the device by as much as 25 mV.


ACS758xCB
X050B PERFORMANCE CHARACTERISTICS1: TOP = 40C to 150C, VCC= 5 V, unless otherwise specified
Characteristic
Primary Sampled Current
Symbol
Min.
Typ.
Max.
50
50
40
mV/A
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25C to 150C
39.4
mV/A
Sens(TOP)LT Full scale of IP applied for 5 ms,TOP = 40C to 25C
41
mV/A
TA= 25C, 10 nF on VIOUT pin to GND
10
mV
Up to full scale of IP, IP applied for 5 ms
IP = 0 A, TA = 25C
mV
VOE(TOP)HT IP = 0 A, TOP = 25C to 150C
15
mV
VOE(TOP)LT IP = 0 A, TOP = 40C to 25C
35
mV
SensTA
Sensitivity
Noise2
VNOISE
Nonlinearity
ELIN
VOE(TA)
Electrical Offset Voltage3

Magnetic Offset Error
Total Output Error4
Test Conditions
IP
Full scale of IP applied for 5 ms, TA = 25C
Units
IERROM
IP = 0 A, TA = 25C, after excursion of 50 A
100
mA
ETOT(HT)
Over full scale of IP, IP applied for 5 ms, TOP = 25C to 150C
1.2
ETOT(LT)
1See
Characteristic Performance Data page for parameter distributions over temperature range.
23 sigma noise voltage.
3V
OE(TOP) drift is referred to ideal VIOUT(Q) = 2.5 V.
4Percentage of I . Output filtered.
P
X050U PERFORMANCE CHARACTERISTICS1: TOP = 40C to 150C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Min.
Typ.
Max.
50
60
mV/A
59
mV/A
Sens(TOP)LT Full scale of IP applied for 5 ms,TOP = 40C to 25C
61
mV/A
15
mV
IP = 0 A, TA = 25C
mV
20
mV
40
mV
SensTA
Sensitivity
Noise2
Nonlinearity
VNOISE
ELIN
VOE(TA)

Total Output Error4
Test Conditions
IP
Units
IERROM
100
mA
ETOT(HT)
1.2
ETOT(LT)
1See
3V
P


ACS758xCB
Characteristic
Symbol
Min.
Typ.
Max.
100
100
20
mV/A
19.75
mV/A
Sens(TOP)LT Full scale of IP applied for 5 ms, TOP = 40C to 25C
20.5
mV/A
mV
1.25
1.25
mV
20
mV
20
mV
SensTA
Sensitivity
Noise2
VNOISE
Nonlinearity
ELIN
VOE(TA)

Total Output Error4
Test Conditions
IP

IP = 0 A, TA = 25C
Units
IERROM
150
mA
ETOT(HT)
1.3
ETOT(LT)
2.4
1See
3V
P
Characteristic
Symbol
Typ.
Max.
100
40
mV/A
39.5
mV/A
41
mV/A
12
mV
1.25
1.25
mV
20
mV
20
mV
IP
SensTA
Sensitivity
Noise2
Nonlinearity
VNOISE
ELIN
VOE(TA)

Total Output Error4
Test Conditions

IP = 0 A, TA = 25C
Min.
Units
IERROM
150
mA
ETOT(HT)
1.3
ETOT(LT)
2.4
1See
3V
P


ACS758xCB
Characteristic
Symbol
Min.
Typ.
Max.
150
150
13.3
mV/A
13.1
mV/A
13.5
mV/A
mV
SensTA
Sensitivity
Noise2
VNOISE
Nonlinearity

Total Output Error4
Units
mV
14
mV
24
mV
ELIN
VOE(TA)
Test Conditions
IP

IP = 0 A, TA = 25C
IERROM
205
mA
ETOT(HT)
1.8
ETOT(LT)
1.6
1See
3V
P
Characteristic
Symbol
Typ.
Max.
150
26.6
mV/A
26.6
mV/A
27.4
mV/A
mV
mV
14
mV
24
mV
IP
SensTA
Sensitivity
Noise2
Nonlinearity
VNOISE
ELIN
VOE(TA)

Total Output Error4
Test Conditions

IP = 0 A, TA = 25C
Min.
Units
IERROM
205
mA
ETOT(HT)
1.8
ETOT(LT)
1.6
1See
3V
P


ACS758xCB
Characteristic
Symbol
SensTA
Sensitivity
Noise2

Total Output Error4
Typ.
Max.
200
Units
A
10
mV/A
9.88
mV/A
10.13
mV/A
mV
mV
15
mV
25
mV
ELIN
VOE(TA)
Min.
200

VNOISE
Nonlinearity
Test Conditions
IP

IP = 0 A, TA = 25C
IERROM
230
mA
ETOT(HT)
1.2
ETOT(LT)
1.2
1See
3V
P
Characteristic
Symbol
Typ.
Max.
200
20
mV/A
19.7
mV/A
20.3
mV/A
mV
mV
20
mV
35
mV
IP
SensTA
Sensitivity
Noise2
Nonlinearity
VNOISE
ELIN
VOE(TA)

Total Output Error4
Test Conditions

IP = 0 A, TA = 25C
Min.
Units
IERROM
230
mA
ETOT(HT)
1.2
ETOT(LT)
1.2
1See
3V
P

10

ACS758xCB
CHARACTERISTIC PERFORMANCE DATA

Data taken using the ACS758LCB-50B
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
30
42.0
20
42.5
Sens (mV/A)
10
VOE (mV)
Sensitivity versus Ambient Temperature
0
-10
-20
41.0
40.5
40.0
39.5
-30
39.0
-40
-50
50
-25
25
50
75
100
125
38.5
50
150
-25
25
TA (C)
75
100
125
150
Symmetry versus Ambient Temperature
0.45
100.40
0.40
100.35
0.35
100.30
0.30
100.25
ESYM (%)
ELIN (%)
Nonlinearity versus Ambient Temperature
100.20
0.25
100.15
0.20
0.15
100.10
0.10
100.05
0.05
100.00
0
50
-25
25
50
75
100
125
99.95
50
150
-25
25
Magnetic Offset Error versus Ambient Temperature
75
100
125
150
Total Output Error versus Ambient Temperature

6
140
120
100
ETOT (%)
80
60
40
2
1
0
-1
-2
20
0
50
50
TA (C)
TA (C)
IERROM (mA)
50
TA (C)
-3
-25
25
50
75
100
125
-4
50
150
-25
25
50
75
100
125
150
TA (C)
TA (C)
Typical Maximum Limit
Mean
Typical Minimum Limit

11

ACS758xCB

Accuracy Data
21.2
20
21.0
15
20.8
Sens (mV/A)
25
10
VOE (mV)
5
0
-5
20.6
20.4
20.2
20.0
-10
19.8
-15
19.6
-20
19.4
-25
50
-25
25
50
75
100
125
19.2
50
150
-25
25
TA (C)
100
125
150
0.40
100.6
0.35
100.5
0.30
100.4
ESYM (%)
ELIN (%)
75
TA (C)
0.25
0.20
0.15
100.3
100.2
100.1
100.0
0.10
99.9
0.05
99.8
0
50
-25
25
50
75
100
125
99.7
50
150
-25
25

190
180
170
ETOT (%)
160
150
130
120
110
-25
25
50
75
100
125
150
200
100
50
50
TA (C)
TA (C)
IERROM (mA)
50
75
100
125
150
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
50
-25
25
50
75
100
125
150
TA (C)
TA (C)
Mean

12

ACS758xCB

Data taken using the ACS758KCB-150B
Accuracy Data
20
14.0
15
13.8
Sens (mV/A)
10
VOE (mV)
5
0
-5
-10
-15
13.6
13.4
13.2
13.0
-20
12.8
-25
-30
60
40
20
20
40
60
80
100
120
12.6
60
140
40
20
20
TA (C)
80
100
120
140

100.6
0.25
100.5
02.0
ESYM (%)
ELIN (%)
60
100.7
0.30
0.15
100.4
100.3
100.2
100.1
0.10
100.0
0.05
99.9
0
60
40
20
20
40
60
80
100
120
99.8
60
140
40
20
20

250
ETOT (%)
200
150
100
50
0
40
20
20
40
60
80
100
120
140
300
60
40
TA (C)
TA (C)
IERROM (mA)
40
TA (C)
60
80
100
120
140
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
60
40
20
20
40
60
80
100
120
140
TA (C)
TA (C)
Mean

13

ACS758xCB

Data taken using the ACS758ECB-200B
Accuracy Data
25
20
15
10
5
0
-5
-10
-15
-20
-25
-30
60

10.4
10.3
Sens (mV/A)
VOE (mV)
10.2
10.1
10.0
9.9
9.8
9.7
9.6
40
20
20
40
60
80
100
120
9.5
60
140
40
20
20
TA (C)
100
120
140
100.6
100.4
100.2
100.0
99.8
99.6
40
20
20
40
60
80
100
120
140
60
40
20
20
40
60
80
100
120
140
TA (C)

4
350
300
250
200
ETOT (%)
IERROM (mA)
80
TA (C)
150
100
0
-1
-2
-3
-4
50
0
60
60
100.8
ESYM (%)
ELIN (%)

0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
-0.02
-0.04
-0.06
60
40
TA (C)
-5
40
20
20
40
60
80
100
120
-6
60
140
40
20
20
40
60
80
100
120
140
TA (C)
TA (C)
Mean

14

ACS758xCB

Timing Data
Rise Time
Propagation Delay Time
IP (20 A/div.)
IP (20 A/div.)
VIOUT (0.5 V/div.)
VIOUT (0.5 V/div.)
997 ns
2.988 s
t (2 s/div.)
t (2 s/div.)
Response Time
Power-on Delay
VCC
IP (20 A/div.)
VIOUT (0.5 V/div.)
9.034 s
VIOUT (1 V/div.)
(IP = 60 A DC)
3.960 s
t (2 s/div.)
t (2 s/div.)

15

ACS758xCB
CHARACTERISTIC DEFINITIONS
Definitions of Accuracy Characteristics
Sensitivity (Sens). The change in device output in response to a
1A change through the primary conductor. The sensitivity is the
product of the magnetic circuit sensitivity (G/A) 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
half-scale current of the device.
Noise (VNOISE). The noise floor is derived from the thermal and
shot noise observed in Hall elements. Dividing the noise (mV)
by the sensitivity (mV/A) provides the smallest current that the
device is able to resolve.
Nonlinearity (ELIN). The degree to which the voltage output
from the IC varies in direct proportion to the primary current
through its half-scale amplitude. Nonlinearity in the output can be
attributed to the saturation of the flux concentrator approaching
the half-scale current. The following equation is used to derive
the linearity:
{ [
100 1
gain % sat ( VIOUT_half-scale amperes VIOUT(Q) )

2 (VIOUT_quarter-scale amperes VIOUT(Q) )
[{
where
gain = the gain variation as a function of temperature changes
from 25C,
% sat = the percentage of saturation of the flux concentrator, which becomes significant as the current being sampled
approaches half-scale IP , and
VIOUT_half-scale amperes = the output voltage (V) when the sampled
current approximates half-scale IP .
Symmetry (ESYM). The degree to which the absolute voltage
output from the IC varies in proportion to either a positive or
negative half-scale primary current. The following equation is
used to derive symmetry:
100
VIOUT_+ half-scale amperes VIOUT(Q)

VIOUT(Q) VIOUT_half-scale amperes
Ratiometry. The device features a ratiometric output. This

means that the quiescent voltage output, VIOUTQ, and the magnetic sensitivity, Sens, are proportional to the supply voltage, VCC.
The ratiometric change (%) in the quiescent voltage output is

defined as:
VIOUTQ(V) =
VIOUTQ(VCC) VIOUTQ(5V)
VCC
5V
100%
and the ratiometric change (%) in sensitivity is defined as:

Sens(V) =
Sens(VCC)
VCC
Sens(5V)
5V
100%
Quiescent output voltage (VIOUT(Q)). Quiescent output voltage

(VIOUT(Q)). The output of the device when the primary current is
zero. For bidirectional devices, it nominally remains at VCC2.
Thus, VCC = 5 V translates into VIOUT(QBI) = 2.5V. For unidirectional devices, it nominally remains at 0.12 VCC. Thus, VCC
=5V translates into VIOUT(QUNI) = 0.6V. Variation in VIOUT(Q)
can be attributed to the resolution of the Allegro linear IC quiescent voltage trim, magnetic hysteresis, and thermal drift.
Electrical offset voltage (VOE). The deviation of the device output from its ideal quiescent value of VCC 2 for bidirectional and
0.1 VCC for unidirectional devices, due to nonmagnetic causes.
Magnetic offset error (IERROM). The magnetic offset is due to
the residual magnetism (remnant field) of the core material. The
magnetic offset error is highest when the magnetic circuit has
been saturated, usually when the device has been subjected to a
full-scale or high-current overload condition. The magnetic offset
is largely dependent on the material used as a flux concentrator.
The larger magnetic offsets are observed at the lower operating
temperatures.
Total Output Error (ETOT). The maximum deviation of the
actual output from its ideal value, also referred to as accuracy,
illustrated graphically in the output voltage versus current chart
on the following page.
ETOT is divided into four areas:
0 A at 25C. Accuracy at the zero current flow at 25C,
without the effects of temperature.
0 A over temperature. Accuracy at the zero current flow
including temperature effects.
Half-scale current at 25C. Accuracy at the the half-scale
current at 25C, without the effects of temperature.
Half-scale current over temperature. Accuracy at the halfscale current flow including temperature effects.
16

ACS758xCB
Definitions of Dynamic Response Characteristics
Power-On Time (tPO). 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.
Power-On Time, tPO , 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, VCC(min), as shown in the
chart at right.
Rise time (tr). The time interval between a) when the device
reaches 10% of its full scale value, and b) when it reaches 90%
of its full scale value. The rise time to a step response is used to
derive the bandwidth of the device, in which (3 dB) = 0.35/tr.
Both tr and tRESPONSE are detrimentally affected by eddy current
losses observed in the conductive IC ground plane.
I (%)
Output Voltage versus Sampled Current
Total Output Error at 0 A and at Half-Scale Current

Accuracy
Over Temp erature
Increasing VIOUT(V)
Primary Current
90
Accuracy
25C Only
Bidirectional
Average
VIOUT
Transducer Output
10
0
Rise Time, tr
Accuracy
Over Temp erature
Propagation delay (tPROP). The time required for the device

output to reflect a change in the primary current signal. Propagation delay is attributed to inductive loading within the linear IC
package, as well as in the inductive loop formed by the primary
conductor geometry. Propagation delay can be considered as a
fixed time offset and may be compensated.
Accuracy
25C Only
IP(min)
IP (A)
+IP (A)
Half Scale
IP(max)
0A
Decreasing VIOUT(V)
I (%)
Primary Current
Accuracy
25C Only
90
Accuracy
Over Temp erature
Transducer Output
Accuracy
Over Temp erature
Increasing VIOUT(V)
0
Propagation Time, tPROP
Accuracy
25C Only
Unidirectional
Average
VIOUT
Accuracy
Over Temp erature
Accuracy
25C Only
IP (A)
+IP (A)
0A
Full Scale
IP(max)
Decreasing VIOUT(V)

17

ACS758xCB
Chopper Stabilization Technique

Chopper Stabilization is an innovative circuit technique that is
used to minimize the offset voltage of a Hall element and an associated on-chip amplifier. Allegro patented a Chopper Stabilization technique that nearly eliminates Hall IC output drift induced
by temperature or package stress effects.
This offset reduction technique is based on a signal modulationdemodulation process. Modulation is used to separate the undesired DC offset signal from the magnetically induced signal in the
frequency domain. Then, using a low-pass filter, the modulated
DC offset is suppressed while the magnetically induced signal
passes through the filter. The anti-aliasing filter prevents aliasing
from happening in applications with high frequency signal com-
ponents which are beyond the users frequency range of interest.

As a result of this chopper stabilization approach, the output
voltage from the Hall IC is desensitized to the effects of temperature and mechanical stress. This technique produces devices that
have an extremely stable Electrical Offset Voltage, are immune to
thermal stress, and have precise recoverability after temperature
cycling.
This technique is made possible through the use of a BiCMOS
process that allows the use of low-offset and low-noise amplifiers
in combination with high-density logic integration and sample
and hold circuits.
Regulator
Clock/Logic
Sample and
Hold
Amp
Anti-aliasing
Filter
Hall Element
Low-Pass
Filter
Concept of Chopper Stabilization Technique

18

ACS758xCB
PACKAGE OUTLINE DRAWING

For Reference Only Not for Tooling Use
(Reference DWG-9111 & DWG-9110)
Dimensions in millimeters NOT TO SCALE
Dimensions exclusive of mold flash, gate burs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
14.0 0.2
0.5
3.5 0.2
4.0 0.2
R3
12
1.50 0.10
R1
R2
3.0 0.2
4
A
0.5 B
3
17.5 0.2
4
21.4
13.00 0.10
Branded
Face
4.40 0.10
0.8
1.9 0.2
1.5
2.9 0.2
0.51 0.10
1
3
0.381
+0.060
0.030
1.91
55
10.00 0.10
PCB Layout Reference View
3.5 0.2
NNNNNNN
TTT-AAA
7.00 0.10
LLLLLLL
A Dambar removal intrusion
YYWW
B Perimeter through-holes recommended

C Branding scale and appearance at supplier discretion
1
C
Standard Branding Reference View

N
T
A
L
Y
= Device part number

= Temperature code
= Amperage range
= Lot number
= Last two digits of year of
manufacture
W = Week of manufacture
= Supplier emblem
Creepage distance, current terminals to signal pins: 7.25 mm

Clearance distance, current terminals to signal pins: 7.25 mm
Package mass: 4.63 g typical
Package CB, 5-pin Package, Leadform PFF

19

ACS758xCB

(Reference DWG-9111, DWG-9110)
14.0 0.2
4.0 0.2
3.0 0.2
0.8
5
1.5
1.50 0.10
1.91
B
2.75 0.10
PCB Layout Reference View
23.50 0.5
NNNNNNN
TTT-AAA
13.00 0.10
4.40 0.10
Branded
Face
LLLLLLL
YYWW
1.9 0.2
2.9 0.2
0.51 0.10
1
3
0.381
+0.060
0.030
55
3.5 0.2
10.00 0.10

N
T
A
L
Y

= Temperature code
= Amperage range
= Lot number
manufacture
= Supplier emblem
7.00 0.10
B Branding scale and appearance at supplier discretion
Package CB, 5-pin Package, Leadform PSF

20

ACS758xCB

(Reference DWG-9111, DWG-9110)
14.0 0.2
4.0 0.2
3.0 0.2
4
1.50 0.10
2.75 0.10
NNNNNNN
TTT-AAA
23.50 0.5
LLLLLLL
13.00 0.10
YYWW
4.40 0.10
Branded
Face
1
N
T
A
L
Y

= Temperature code
= Amperage range
= Lot number
manufacture
= Supplier emblem
3.18 0.10
1.9 0.2
11.0 0.05
0.51 0.10
+0.060
0.381
0.030
10.00 0.10
7.00 0.10
B Branding scale and appearance at supplier discretion
Creepage distance, current terminals to signal pins: 7.25 mm

Clearance distance, current terminals to signal pins: 7.25 mm
Package mass: 4.63 g typical
Package CB, 5-pin Package, Leadform PSS

21

ACS758xCB
Revision History
Revision
Revision Date
January 17, 2014
April 7, 2015
Description of Revision
Update features list and product offering
Updated TUV certification and refomratted document
Copyright 2008-2015, Allegro MicroSystems, LLC

The products described herein are protected by U.S. patents: 6,781,359, 7,265,531, and 8,080,994.
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.
Allegros 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
Allegros product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its
use; nor for any infringement of patents or other rights of third parties which may result from its use.
For the latest version of this document, visit our website:
www.allegromicro.com
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ACS758xCB

Thermally Enhanced, Fully Integrated, Hall Effect-Based

Industry-leading noise performance through proprietary

Continued on the next page

The Allegro ACS758 family of current sensor ICs provides

PACKAGE: 5-PIN CB PACAKGE

The thickness of the copper conductor allows survival of the

Continued on the next page

Application 1: The ACS758 outputs an analog signal, VOUT,

Thermally Enhanced, Fully Integrated, Hall Effect-Based

FEATURES AND BENEFITS (CONTINUED)

3.0 to 5.5 V, single supply operation

leadform options available for qualified volumes.

Allegro MicroSystems, LLC

Thermally Enhanced, Fully Integrated, Hall Effect-Based

Absolute Maximum Ratings

Reverse Supply Voltage

Forward Output Voltage

Forward Supply Voltage

Reverse Output Voltage

Output Source Current

Output Sink Current

Dielectric Strength Test Voltage*

Agency type-tested for 60 seconds per

Working Voltage for Basic Isolation

For basic (single) isolation per UL standard 60950-1, 2nd

For reinforced (double) isolation per UL standard 609501, 2nd Edition

Working Voltage for Reinforced Isolation

Allegro MicroSystems, LLC

Thermally Enhanced, Fully Integrated, Hall Effect-Based

Thermal Characteristics may require derating at maximum conditions

Package Thermal Resistance

Mounted on the Allegro evaluation board with 2800mm2

TA = 25C, 1s duration, 1% duty cycle

TA = 85C, 1s duration, 1% duty cycle

TA = 150C, 1s duration, 1% duty cycle

*Additional thermal information available on the Allegro website

Typical Overcurrent Capabilities1,2

Allegro MicroSystems, LLC

Thermally Enhanced, Fully Integrated, Hall Effect-Based

Functional Block Diagram

Terminal List Table

Device power supply terminal

Signal ground terminal

Terminal for current being sampled

Terminal for current being sampled

Analog output signal

Allegro MicroSystems, LLC

Thermally Enhanced, Fully Integrated, Hall Effect-Based

Measured as sum of tPROP and tr

Output Load Resistance

Output Load Capacitance

Bidirectional variant, IP = 0 A, TA = 25C

Primary Conductor Resistance

IP step = 60% of IP+, 10% to 90% rise time, TA = 25C,

3 dB; TA = 25C, COUT = 0.47 nF

Unidirectional variant, IP = 0 A, TA = 25C, VIOUT(QUNI) is

is factory-trimmed at 5 V, for optimal accuracy.

Allegro MicroSystems, LLC