ACS758LCB-050B-PFF-T [ALLEGRO]
Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 μΩ Current Conductor; 耐热增强型全集成，基于霍尔效应的线性电流传感器IC 100 μΩ电流导体
| 型号： | ACS758LCB-050B-PFF-T |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 μΩ Current Conductor |
| 文件： | 总16页 (文件大小：587K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ACS758xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
Features and Benefits
Description
▪ Industry-leading noise performance through proprietary
amplifier and filter design techniques
The Allegro® ACS758 family of current sensor ICs provides
economicalandprecisesolutionsforACorDCcurrentsensing.
Typical applications include motor control, load detection and
management, power supply and DC-to-DC converter control,
inverter control, and overcurrent fault detection.
▪ 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 μΩ internal conductor resistance
▪ Galvanic isolation allows use in economical, high-side
current sensing in high voltage systems
▪ 3.0 to 5.5 V, single supply operation
▪ 120 kHz typical bandwidth
▪ 3 μs output rise time in response to step input current
▪ Output voltage proportional to AC or DC currents
▪ Factory-trimmed for accuracy
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
proportionalvoltage.Deviceaccuracyisoptimizedthroughthe
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 byAllegro proprietary integrated shield
technology,guaranteeslowoutputvoltagerippleandlowoffset
drift in high-side, high voltage applications.
▪ Extremely stable output offset voltage
▪ Nearly zero magnetic hysteresis
Package: 5-pin package
Theoutputofthedevicehasapositiveslope(>VCC/2)whenan
increasingcurrentflowsthroughtheprimarycopperconduction
path (from terminal 4 to terminal 5), which is the path used
forcurrentsampling.Theinternalresistanceofthisconductive
path is 100 μΩ typical, providing low power loss.
The thickness of the copper conductor allows survival of the
device at high overcurrent conditions. The terminals of the
PSS
PFF
Leadform
Leadform
Continued on the next page…
Additional leadforms available for qualifying volumes
Typical Application
+3.3 or 5 V
1
2
4
VCC
GND
IP+
ACS758
CBYP
0.1 μF
IP
CF
5
IP–
3
VIOUT
VOUT
RF
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.
ACS758-DS, Rev. 1
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Description (continued)
conductive path are electrically isolated from the signal leads (pins The device is fully calibrated prior to shipment from the factory.
1 through 3). This allows the ACS758 family of sensor ICs to be TheACS758 family is lead (Pb) free.All leads are plated with 100%
used in applications requiring electrical isolation without the use of matte tin, and there is no Pb inside the package. The heavy gauge
opto-isolators or other costly isolation techniques.
leadframe is made of oxygen-free copper.
Selection Guide
Package
Primary Sampled
Sensitivity
Sens (Typ.)
(mV/A)
TOP
(°C)
Part Number1
Current , IP
(A)
Packing2
Terminals Signal Pins
ACS758LCB-050B-PFF-T
ACS758LCB-100B-PFF-T
ACS758KCB-150B-PFF-T
ACS758KCB-150B-PSS-T
ACS758ECB-200B-PFF-T
ACS758ECB-200B-PSS-T
Formed
Formed
Formed
Straight
Formed
Straight
Formed
Formed
Formed
Straight
Formed
Straight
±50
40
20
–40 to 150
–40 to 125
–40 to 85
±100
±150
±200
13.3
10
170 per bulk bag
1Additional leadform options available for qualified volumes
2Contact Allegro for additional packing options.
Absolute Maximum Ratings
Characteristic
Symbol
VCC
Notes
Rating
Units
Forward Supply Voltage
8
V
V
Reverse Supply Voltage
VRCC
–0.5
Voltage applied between pins 1-3 and 4-5;
tested at 3000 VAC for 1 minute according to
UL standard 60950-1
Working Voltage for Reinforced Isolation
VWORKING
353
VAC
Forward Output Voltage
Reverse Output Voltage
Output Source Current
Output Sink Current
VIOUT
VRIOUT
IOUT(Source)
IOUT(Sink)
28
–0.5
V
V
VIOUT to GND
VCC to VIOUT
Range E
3
mA
mA
ºC
ºC
ºC
ºC
ºC
1
–40 to 85
–40 to 125
–40 to 150
165
Nominal Operating Ambient Temperature
TOP
Range K
Range L
Maximum Junction
TJ(max)
Tstg
Storage Temperature
–65 to 165
Typical Overcurrent Capabilities1,2
Characteristic
Symbol
Notes
Rating
1200
900
Units
TA = 25°C, 1s duration, 1% duty cycle
TA = 85°C, 1s duration, 1% duty cycle
TA = 150°C, 1s duration, 1% duty cycle
A
A
A
Overcurrent
IPOC
600
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.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
2
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Functional Block Diagram
+3.3 to 5 V
VCC
IP+
To all subcircuits
VIOUT
Amp
Out
0.1 μF
Offset
Gain
Gain
Offset
Temperature
Coefficient
Temperature
Coefficient
Trim Control
GND
IP–
Pin-out Diagram
IP+
4
3
2
1
VIOUT
GND
VCC
IP–
5
Terminal List Table
Number
Name
VCC
GND
VIOUT
IP+
Description
1
2
3
4
5
Device power supply terminal
Signal ground terminal
Analog output signal
Terminal for current being sampled
Terminal for current being sampled
IP–
Allegro MicroSystems, Inc.
115 Northeast Cutoff
3
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
COMMON OPERATING CHARACTERISTICS1 valid at TOP = –40°C to 150°C and VCC = 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
5.0
10
Max.
5.5
13.5
–
Units
V
Supply Voltage
VCC
3
–
–
Supply Current
Power-On Delay
ICC
Output open
TA = 25°C
mA
μs
tPOD
10
IP step = 60% of IP+, 10% to 90% rise time, TA = 25°C,
COUT = 0.47 nF
Rise Time2
tr
–
3
–
μs
Propagation Delay Time2
Response Time
tPROP
TA = 25°C, COUT = 0.47 nF
–
–
1
4
–
–
μs
μs
tRESPONSE
Measured as sum of tPROP and tr
Internal Bandwidth3
BWi
–3 dB; TA = 25°C, COUT = 0.47 nF
VIOUT to GND
–
4.7
–
120
–
–
–
kHz
kꢀ
nF
μΩ
%
Output Load Resistance
Output Load Capacitance
Primary Conductor Resistance
Symmetry2
RLOAD(MIN)
CLOAD(MAX)
RPRIMARY
ESYM
VIOUT to GND
–
10
–
TA = 25°C
–
100
100
Over half-scale of Ip
99
101
Quiescent Output Voltage4
Ratiometry2
VIOUT(Q)
VRAT
IP = 0 A, TA = 25°C
VCC = 4.5 to 5.5 V
–
–
VCC/2
100
–
–
V
%
1Device is factory-trimmed at 5 V, for optimal accuracy.
2See Characteristic Definitions section of this datasheet.
3Calculated using the formula BWi = 0.35 / tr.
4VIOUT(Q) may drift over the lifetime of the device by as much as ±25 mV.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
4
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
X050 PERFORMANCE CHARACTERISTICS1: TOP = –40°C to 150°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
–50
–
Typ.
–
Max.
50
–
Units
A
Primary Sampled Current
IP
SensTA
Full scale of IP applied for 5 ms, TA = 25°C
40
mV/A
mV/A
mV/A
mV
%
Sensitivity
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 150°C
Sens(TOP)LT Full scale of IP applied for 5 ms,TOP = –40°C to 25°C
–
39.4
41
–
–
–
Noise2
VNOISE
ELIN
TA= 25°C, 10 nF on VIOUT pin to GND
Up to full scale of IP, IP applied for 5 ms
IP = 0 A, TA = 25°C
–
10
–
Nonlinearity
– 1
–
–
1
VOE(TA)
±5
–
mV
mV
mV
mA
%
Electrical Offset Voltage3
VOE(TOP)HT IP = 0 A, TOP = 25°C to 150°C
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
–
±15
±35
100
–1.2
2
–
–
–
Magnetic Offset Error
Total Output Error4
IERROM
IP = 0 A, TA = 25°C, after excursion of 50 A
–
–
ETOT(HT) Over full scale of IP, IP applied for 5 ms, TOP = 25°C to 150°C
ETOT(LT) Over full scale of IP, IP applied for 5 ms, TOP = –40°C to 25°C
–
–
–
–
%
1See Characteristic Performance Data page for parameter distributions over temperature range.
2±3 sigma noise voltage.
3VOE(TOP) drift is referred to ideal VIOUT(Q) = 2.5 V.
4Percentage of IP. Output filtered.
X100 PERFORMANCE CHARACTERISTICS1: TOP = –40°C to 150°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
–
Max.
Units
A
Primary Sampled Current
IP
–100
100
–
SensTA
Full scale of IP applied for 5 ms, TA = 25°C
–
20
mV/A
mV/A
mV/A
mV
%
Sensitivity
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 150°C
Sens(TOP)LT Full scale of IP applied for 5 ms, TOP = –40°C to 25°C
–
19.75
20.5
6
–
–
–
Noise2
VNOISE
ELIN
TA= 25°C, 10 nF on VIOUT pin to GND
Up to full scale of IP, IP applied for 5 ms
IP = 0 A, TA = 25°C
–
–
Nonlinearity
– 1.25
–
1.25
–
VOE(TA)
–
–
–
–
–
–
±5
mV
mV
mV
mA
%
Electrical Offset Voltage3
VOE(TOP)HT IP = 0 A, TOP = 25°C to 150°C
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
±20
±20
150
–1.3
2.4
–
–
Magnetic Offset Error
Total Output Error4
IERROM
IP = 0 A, TA = 25°C, after excursion of 100 A
–
ETOT(HT) Over full scale of IP, IP applied for 5 ms, TOP = 25°C to 150°C
ETOT(LT) Over full scale of IP, IP applied for 5 ms, TOP = –40°C to 25°C
–
–
%
1See Characteristic Performance Data page for parameter distributions over temperature range.
2±3 sigma noise voltage.
3VOE(TOP) drift is referred to ideal VIOUT(Q) = 2.5 V.
4Percentage of IP. Output filtered.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
5
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
X150 PERFORMANCE CHARACTERISTICS1: TOP = –40°C to 125°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
–
Max.
Units
A
Primary Sampled Current
IP
–150
–
150
–
SensTA
Full scale of IP applied for 5 ms, TA = 25°C
13.3
13.1
13.5
4
mV/A
mV/A
mV/A
mV
%
Sensitivity
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 125°C
Sens(TOP)LT Full scale of IP applied for 5 ms, TOP = –40°C to 25°C
–
–
–
–
Noise2
VNOISE
ELIN
TA= 25°C, 10 nF on VIOUT pin to GND
Up to full scale of IP, IP applied for 5 ms
IP = 0 A, TA = 25°C
–
–
Nonlinearity
– 1
–
–
1
VOE(TA)
±5
–
mV
mV
mV
mA
%
Electrical Offset Voltage3
VOE(TOP)HT IP = 0 A, TOP = 25°C to 125°C
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
–
±14
±24
205
–1.8
1.6
–
–
–
Magnetic Offset Error
Total Output Error4
IERROM
IP = 0 A, TA = 25°C, after excursion of 150 A
–
–
ETOT(HT) Over full scale of IP, IP applied for 5 ms, TOP = 25°C to 125°C
ETOT(LT) Over full scale of IP, IP applied for 5 ms, TOP = –40°C to 25°C
–
–
–
–
%
1See Characteristic Performance Data page for parameter distributions over temperature range.
2±3 sigma noise voltage.
3VOE(TOP) drift is referred to ideal VIOUT(Q) = 2.5 V.
4Percentage of IP. Output filtered.
X200 PERFORMANCE CHARACTERISTICS1: TOP = –40°C to 85°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
–
Max.
Units
A
Primary Sampled Current
IP
–200
–
200
–
SensTA
Full scale of IP applied for 5 ms, TA = 25°C
10
mV/A
mV/A
mV/A
mV
%
Sensitivity
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 85°C
Sens(TOP)LT Full scale of IP applied for 5 ms, TOP = –40°C to 25°C
–
9.88
10.13
3
–
–
–
Noise2
VNOISE
ELIN
TA= 25°C, 10 nF on VIOUT pin to GND
Up to full scale of IP, IP applied for 5 ms
IP = 0 A, TA = 25°C
–
–
Nonlinearity
– 1
–
–
1
VOE(TA)
±5
–
mV
mV
mV
mA
%
Electrical Offset Voltage3
VOE(TOP)HT IP = 0 A, TOP = 25°C to 85°C
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
–
±15
±25
230
–1.2
1.2
–
–
–
Magnetic Offset Error
Total Output Error4
IERROM
IP = 0 A, TA = 25°C, after excursion of 200 A
–
–
ETOT(HT) Over full scale of IP, IP applied for 5 ms, TOP = 25°C to 85°C
ETOT(LT) Over full scale of IP, IP applied for 5 ms, TOP = –40°C to 25°C
–
–
–
–
%
1See Characteristic Performance Data page for parameter distributions over temperature range.
2±3 sigma noise voltage.
3VOE(TOP) drift is referred to ideal VIOUT(Q) = 2.5 V.
4Percentage of IP. Output filtered.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
6
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Characteristic Performance Data
Data taken using the ACS758LCB-50B
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
Sensitivity versus Ambient Temperature
30
20
42.0
42.5
41.0
40.5
40.0
39.5
39.0
38.5
10
0
-10
-20
-30
-40
-50
–50
-25
0
25
50
75
100
125
150
–50
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Nonlinearity versus Ambient Temperature
Symmetry versus Ambient Temperature
100.40
100.35
100.30
100.25
100.20
100.15
100.10
100.05
100.00
99.95
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
–50
-25
0
25
50
75
100
125
150
–50
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Magnetic Offset Error versus Ambient Temperature
Total Output Error versus Ambient Temperature
140
120
100
80
6
5
4
3
2
1
60
0
-1
-2
-3
-4
40
20
0
–50
-25
0
25
50
75
100
125
150
–50
-25
0
25
50
75
100
125
150
TA (°C)
T
A (°C)
Typical Maximum Limit
Typical Minimum Limit
Mean
Allegro MicroSystems, Inc.
115 Northeast Cutoff
7
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Characteristic Performance Data
Data taken using the ACS758LCB-100B
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
Sensitivity versus Ambient Temperature
25
20
15
10
5
21.2
21.0
20.8
20.6
20.4
20.2
20.0
19.8
19.6
19.4
19.2
0
-5
-10
-15
-20
-25
–50
-25
0
25
50
75
100
125
150
–50
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Nonlinearity versus Ambient Temperature
Symmetry versus Ambient Temperature
0.40
100.6
100.5
100.4
100.3
100.2
100.1
100.0
99.9
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
99.8
99.7
–50
-25
0
25
50
75
100
125
150
–50
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Magnetic Offset Error versus Ambient Temperature
Total Output Error versus Ambient Temperature
200
190
180
170
160
150
130
120
110
100
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
–50
-25
0
25
50
75
100
125
150
–50
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Typical Maximum Limit
Typical Minimum Limit
Mean
Allegro MicroSystems, Inc.
115 Northeast Cutoff
8
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Characteristic Performance Data
Data taken using the ACS758KCB-150B
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
Sensitivity versus Ambient Temperature
20
15
10
5
14.0
13.8
13.6
13.4
13.2
13.0
12.8
12.6
0
-5
-10
-15
-20
-25
-30
–60
–40
–20
0
20
40
60
80
100
120
140
140
140
–60
–40
–20
0
20
40
60
80
100
120
140
140
140
TA (°C)
TA (°C)
Nonlinearity versus Ambient Temperature
Symmetry versus Ambient Temperature
100.7
100.6
100.5
100.4
100.3
100.2
100.1
100.0
99.9
0.30
0.25
02.0
0.15
0.10
0.05
0
99.8
–60
–40
–20
0
20
40
60
80
100
120
–60
–40
–20
0
20
40
60
80
100
120
TA (°C)
TA (°C)
Magnetic Offset Error versus Ambient Temperature
Total Output Error versus Ambient Temperature
300
250
200
150
100
50
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0
–60
–40
–20
0
20
40
60
80
100
120
–60
–40
–20
0
20
40
60
80
100
120
TA (°C)
TA (°C)
Typical Maximum Limit
Typical Minimum Limit
Mean
Allegro MicroSystems, Inc.
115 Northeast Cutoff
9
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Characteristic Performance Data
Data taken using the ACS758ECB-200B
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
Sensitivity versus Ambient Temperature
25
20
15
10
5
10.4
10.3
10.2
10.1
10.0
9.9
0
-5
-10
-15
-20
-25
-30
9.8
9.7
9.6
9.5
–60
–40
–20
0
20
40
60
80
100
120
140
140
140
–60
–40
–20
0
20
40
60
80
100
120
140
TA (°C)
TA (°C)
Nonlinearity versus Ambient Temperature
Symmetry versus Ambient Temperature
0.16
100.8
100.6
100.4
100.2
100.0
99.8
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
-0.02
-0.04
-0.06
99.6
–60
–40
–20
0
20
40
60
80
100
120
–60
–40
–20
0
20
40
60
80
100
120
140
TA (°C)
TA (°C)
Magnetic Offset Error versus Ambient Temperature
Total Output Error versus Ambient Temperature
350
300
250
200
150
100
50
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0
–60
–40
–20
0
20
40
60
80
100
120
140
–60
–40
–20
0
20
40
60
80
100
120
TA (°C)
TA (°C)
Typical Maximum Limit
Typical Minimum Limit
Mean
Allegro MicroSystems, Inc.
115 Northeast Cutoff
10
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Characteristic Performance Data
Data taken using the ACS758LCB-100
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 μs
t (2 μs/div.)
t (2 μs/div.)
Response Time
Power-on Delay
VCC
IP (20 A/div.)
V
IOUT (0.5 V/div.)
9.034 μs
VIOUT (1 V/div.)
(IP = 60 A DC)
3.960 μs
t (2 μs/div.)
t (2 μs/div.)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
11
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
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 pro-
grammed at the factory to optimize the sensitivity (mV/A) for the
half-scale current of the device.
The ratiometric change (%) in the quiescent voltage output is
defined as:
VIOUTQ(V
VIOUTQ(5V)
)
CC
$VIOUTQ($V)
s ꢀꢁꢁ%
=
VCC
5 V
and the ratiometric change (%) in sensitivity is defined as:
Sens(V
Sens(ꢃVꢂ
5 V
ꢂ
CC
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.
$Sens($Vꢂ
s ꢀꢁꢁ%
=
VCC
Quiescent output voltage (VIOUT(Q)). The output of the device
when the primary current is zero. For a unipolar supply voltage,
it nominally remains at VCC ⁄ 2. Thus, VCC = 5 V translates into
IOUT(Q) = 2.5 V. Variation in VIOUT(Q) can be attributed to the
resolution of the Allegro linear IC quiescent voltage trim, mag-
netic hysteresis, and thermal drift.
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:
V
Electrical offset voltage (VOE). The deviation of the device out-
put from its ideal quiescent value of VCC ⁄ 2 due to nonmagnetic
causes.
V
–VIOUT(Q)
Δ gain × % sat (
IOUT_half-scale amperes
2 (VIOUT_quarter-scale amperes –VIOUT(Q)
100
1–
{
[
) [ {
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.
)
where
∆ gain = the gain variation as a function of temperature
changes from 25ºC,
% sat = the percentage of saturation of the flux concentra-
tor, which becomes significant as the current being sampled
approaches half-scale ±IP , and
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.
V
IOUT_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:
ETOT is divided into four areas:
0 A at 25°C. Accuracy at the zero current flow at 25°C, with-
out the effects of temperature.
VIOUT_+ half-scale amperes –VIOUT(Q)
0 A over Δ temperature. Accuracy at the zero current flow
100
VIOUT(Q) – VIOUT_–half-scale amperes
including temperature effects.
Half-scale current at 25°C. Accuracy at the the half-scale current
at 25°C, without the effects of temperature.
Ratiometry. The device features a ratiometric output. This
means that the quiescent voltage output, VIOUTQ, and the mag-
netic sensitivity, Sens, are proportional to the supply voltage, VCC
Half-scale current over Δ temperature. Accuracy at the half-
.
scale current flow including temperature effects.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
12
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Definitions of Dynamic Response Characteristics
Power-On Time (tPO). When the supply is ramped to its operat-
ing 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 ƒ(–3 dB) = 0.35/tr.
Both tr and tRESPONSE are detrimentally affected by eddy current
losses observed in the conductive IC ground plane.
Primary Current
I (%)
90
Output Voltage versus Sampled Current
Total Output Error at 0 A and at Half-Scale Current
Transducer Output
10
0
t
Rise Time, t
r
Increasing VIOUT(V)
Accuracy
Over $Temp erature
Accuracy
25°C Only
Average
V
IOUT
Propagation delay (tPROP). The time required for the device
output to reflect a change in the primary current signal. Propaga-
tion 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
Over $Temp erature
Accuracy
25°C Only
IP(min)
–IP (A)
+IP (A)
Half Scale
IP(max)
Primary Current
I (%)
90
0 A
Transducer Output
Accuracy
25°C Only
0
t
Propagation Time, tPROP
Accuracy
Over $Temp erature
Decreasing VIOUT(V)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
13
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
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 asso-
ciated on-chip amplifier. Allegro patented a Chopper Stabiliza-
tion technique that nearly eliminates Hall IC output drift induced
by temperature or package stress effects.
ponents which are beyond the user’s 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 tempera-
ture 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 offset reduction technique is based on a signal modulation-
demodulation process. Modulation is used to separate the unde-
sired 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-
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
Low-Pass
Filter
Hall Element
Amp
Concept of Chopper Stabilization Technique
Allegro MicroSystems, Inc.
115 Northeast Cutoff
14
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Package CB, 5-pin package, leadform PFF
0.5
R1
R3
ꢄ 0.5
B
14.0±0.2
4
R2
1.50±0.10
3.0±0.2
5
4.0±0.2
4
21.4
3
1º±2°
A
3.5±0.2
ꢄ 0.8
ꢄ 1.5
17.5±0.2
13.00±0.10
1.91
PCB Layout Reference View
B
Branded
Face
4.40±0.10
2.9±0.2
NNNNNNN
TTT - AAA
5º±5°
+0.060
–0.030
1
2
3
0.381
10.00±0.10
3.5±0.2
LLLLLLL
YYWW
1
7.00±0.10
Standard Branding Reference View
C
N = Device part number
T = Temperature code
A = Amperage range
L = Lot number
Y = Last two digits of year of manufacture
W = Week of manufacture
= Supplier emblem
0.51±0.10
1.9±0.2
For Reference Only; not for tooling use (reference DWG-9111, DWG-9110)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A Dambar removal intrusion
Perimeter through-holes recommended
B
C
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
Allegro MicroSystems, Inc.
115 Northeast Cutoff
15
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC with 100 μΩ Current Conductor
ACS758xCB
Package CB, 5-pin package, leadform PSS
14.0±0.2
3.0±0.2
4.0±0.2
5
4
1.50±0.10
A
NNNNNNN
TTT - AAA
2.75±0.10
23.50±0.5
LLLLLLL
YYWW
13.00±0.10
4.40±0.10
1
Branded
Face
3.18±0.10
+0.060
Standard Branding Reference View
B
N = Device part number
T = Temperature code
A = Amperage range
11.0±0.05
0.381
–0.030
L = Lot number
1
2
3
Y = Last two digits of year of manufacture
W = Week of manufacture
= Supplier emblem
10.00±0.10
For Reference Only; not for tooling use (reference DWG-9111, DWG-9110)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
7.00±0.10
A Dambar removal intrusion
B
Branding scale and appearance at supplier discretion
0.51±0.10
1.9±0.2
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
Copyright ©2008-2009, Allegro MicroSystems, Inc.
The products described herein are manufactured under one or more of the following U.S. patents: 5,619,137; 5,621,319; 6,781,359; 7,075,287;
7,166,807; 7,265,531; 7,425,821; or other patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to per-
mit 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 life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the
failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. 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
Allegro MicroSystems, Inc.
115 Northeast Cutoff
16
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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