ACS759xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
Features and Benefits
Description
▪ 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 μΩ internal conductor resistance
▪ Galvanic isolation allows use in economical, high-side
current sensing in high voltage systems
▪ 3.0 to 3.6 V, single supply operation
The Allegro® ACS759 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.
Continued on the next page…
TÜV America
Certificate Number:
U8V 09 05 54214 021
High level immunity to current conductor dV/dt and stray
electric fields, offered by Allegro proprietary integrated shield
technology, guarantees low output voltage ripple and low offset
drift in high-side, high voltage applications.
UL Certified
File No.: E316429
Package: 5-pin package
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 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
Leadform
PFF
Leadform
Continued on the next page…
Additional leadforms available for qualifying volumes
Typical Application
+3.3 V
4
VCC
IP+
ACS759
IP
GND
5
1
CBYP
0.1 μF
2
CF
IP–
VIOUT
3
RF
VOUT
Application 1. The ACS759 outputs an analog signal, VOUT , that
varies linearly with the bidirectional AC or DC primary current, IP ,
within the range specified. CF is for optimal noise management,
with values that depend on the application.
ACS759-DS
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Features and Benefits (continued)
▪ 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
▪ Extremely stable output offset voltage
▪ Nearly zero magnetic hysteresis
Description (continued)
conductive path are electrically isolated from the signal leads (pins
1 through 3). This allows the ACS759 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 ACS759 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
Package
Part Number1
Terminals
Signal Pins
Primary Sampled
Current , IP
(A)
Sensitivity
Sens (Typ.)
(mV/A)2
Current
Directionality
ACS759LCB-050B-PFF-T
Formed
Formed
±50
26.4
Bidirectional
ACS759LCB-100B-PFF-T
Formed
Formed
±100
13.2
Bidirectional
ACS759KCB-150B-PFF-T
Formed
Formed
±150
8.8
Bidirectional
ACS759KCB-150B-PSS-T
Straight
Straight
±150
8.8
Bidirectional
ACS759ECB-200B-PFF-T
Formed
Formed
±200
6.6
Bidirectional
ACS759ECB-200B-PSS-T
Straight
Straight
±200
6.6
Bidirectional
TOP
(°C)
Packing3
–40 to 150
–40 to 125
34 pieces
per tube
–40 to 85
1Additional
leadform options available for qualified volumes.
VCC = 3.3 V.
3Contact Allegro for additional packing options.
2With
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Absolute Maximum Ratings
Characteristic
Symbol
Notes
Rating
Unit
Forward Supply Voltage
VCC
8
V
Reverse Supply Voltage
VRCC
–0.5
V
Forward Output Voltage
VIOUT
28
V
Reverse Output Voltage
VRIOUT
–0.5
V
Output Source Current
IOUT(Source)
VIOUT to GND
3
mA
IOUT(Sink)
VCC to VIOUT
1
mA
Output Sink Current
Nominal Operating Ambient Temperature
Maximum Junction
Storage Temperature
TOP
Range E
–40 to 85
ºC
Range K
–40 to 125
ºC
Range L
–40 to 150
ºC
TJ(max)
165
ºC
Tstg
–65 to 165
ºC
Rating
Unit
3000
VAC
VDC or Vpk
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
For reinforced (double) isolation per UL standard
60950-1, 2nd Edition
636
VDC or Vpk
450
Vrms
Working Voltage for Reinforced Isolation
VWFRI
* Allegro does not conduct 60-second testing. It is done only during the UL certification process.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Thermal Characteristics may require derating at maximum conditions
Characteristic
Package Thermal Resistance
Symbol
RθJA
Test Conditions*
Value
Unit
Mounted on the Allegro evaluation board with
2800 mm2 (1400 mm2 on component side and
1400 mm2 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.
7
ºC/W
*Additional thermal information available on the Allegro website
Typical Overcurrent Capabilities1,2
Characteristic
Overcurrent
Symbol
IPOC
Rating
Unit
TA = 25°C, 1s duration, 1% duty cycle
Notes
1200
A
TA = 85°C, 1s duration, 1% duty cycle
900
A
TA = 150°C, 1s duration, 1% duty cycle
600
A
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
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Functional Block Diagram
+3 to 3.6 V
VCC
IP+
Gain
Filter
Dynamic Offset
Cancellation
To all subcircuits
Amp
VIOUT
Out
0.1 μF
Gain
Temperature
Coefficient
Offset
Offset
Temperature
Coefficient
Trim Control
GND
IP–
Pin-out Diagram
IP+
IP–
4
3
VIOUT
2
GND
1
VCC
5
Terminal List Table
Number
Name
1
VCC
Device power supply terminal
Description
2
GND
Signal ground terminal
3
VIOUT
4
IP+
Terminal for current being sampled
5
IP–
Terminal for current being sampled
Analog output signal
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
COMMON OPERATING CHARACTERISTICS1 valid at TOP = –40°C to 150°C and VCC = 3.3 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
VCC
3
3.3
3.6
V
Supply Current
ICC
Output open
–
10
13.5
mA
Power-On Delay
tPOD
TA = 25°C
–
10
–
μs
–
3
–
μs
Rise Time2
Propagation Delay
tr
Time2
Response Time
tPROP
tRESPONSE
Internal Bandwidth3
BWi
IP step = 60% of IP+, 10% to 90% rise time, TA = 25°C,
COUT = 0.47 nF
TA = 25°C, COUT = 0.47 nF
–
1
–
μs
Measured as sum of tPROP and tr
–
4
–
μs
–3 dB; TA = 25°C, COUT = 0.47 nF
–
120
–
kHz
Output Load Resistance
RLOAD(MIN)
VIOUT to GND
4.7
–
–
kΩ
Output Load Capacitance
CLOAD(MAX)
VIOUT to GND
–
–
10
nF
Primary Conductor Resistance
Symmetry2
Quiescent Output
Ratiometry2
RPRIMARY
ESYM
Voltage4
VIOUT(Q)
VRAT
TA = 25°C
–
100
–
μΩ
Over half-scale of Ip
–
100
–
%
IP = 0 A, TA = 25°C
VCC = 3 to 3.6 V
–
–
VCC/2
100
–
–
V
%
1Device
is factory-trimmed at 3.3 V, for optimal accuracy.
Characteristic Definitions section of this datasheet.
3Calculated using the formula BW = 0.35 / t .
i
r
4V
IOUT(Q) may drift over the lifetime of the device by as much as ±20 mV.
2See
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
X050B PERFORMANCE CHARACTERISTICS1:
Characteristic
Primary Sampled Current
Noise2
Min.
Typ.
Max.
–50
–
50
A
–
26.4
–
mV/A
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 150°C
–
26.5
–
mV/A
Sens(TOP)LT Full scale of IP applied for 5 ms,TOP = –40°C to 25°C
–
26
–
mV/A
mV
VNOISE
Nonlinearity
Magnetic Offset Error
Total Output Error4
Full scale of IP applied for 5 ms, TA = 25°C
Unit
TA= 25°C, 10 nF on VIOUT pin to GND
–
6.6
–
Up to full scale of IP , IP applied for 5 ms
–
<±1
–
%
IP = 0 A, TA = 25°C
–
±5
–
mV
VOE(TOP)HT IP = 0 A, TOP = 25°C to 150°C
–
±10
–
mV
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
–
±25
–
mV
ELIN
VOE(TA)
Electrical Offset Voltage3
Test Conditions
IP
SensTA
Sensitivity
TOP = –40°C to 150°C, VCC = 3.3 V, unless otherwise specified
Symbol
IERROM
IP = 0 A, TA = 25°C, after excursion of 50 A
–
125
–
mA
ETOT(HT)
Over full scale of IP , IP applied for 5 ms, TOP = 25°C to 150°C
–
±1.5
–
%
ETOT(LT)
Over full scale of IP , IP applied for 5 ms, TOP = –40°C to 25°C
–
±3.5
–
%
Unit
1See
Characteristic Performance Data page for parameter distributions over temperature range.
2±3 sigma noise voltage.
3V
1
OE(TOP) drift is referred to ideal VIOUT(Q) = /2 VCC.
4Percentage of I . Output filtered.
P
X100B PERFORMANCE CHARACTERISTICS1:
Characteristic
Primary Sampled Current
Noise2
Nonlinearity
Min.
Typ.
Max.
–100
–
100
A
–
13.2
–
mV/A
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 150°C
–
13.2
–
mV/A
Sens(TOP)LT Full scale of IP applied for 5 ms, TOP = –40°C to 25°C
–
13
–
mV/A
mV
VNOISE
Magnetic Offset Error
Total Output Error4
Full scale of IP applied for 5 ms, TA = 25°C
TA= 25°C, 10 nF on VIOUT pin to GND
–
4
–
Up to full scale of IP , IP applied for 5 ms
–
<±1
–
%
IP = 0 A, TA = 25°C
–
±5
–
mV
VOE(TOP)HT IP = 0 A, TOP = 25°C to 150°C
–
±10
–
mV
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
–
±25
–
mV
ELIN
VOE(TA)
Electrical Offset Voltage3
Test Conditions
IP
SensTA
Sensitivity
TOP = –40°C to 150°C, VCC = 3.3 V, unless otherwise specified
Symbol
IERROM
IP = 0 A, TA = 25°C, after excursion of 100 A
–
185
–
mA
ETOT(HT)
Over full scale of IP , IP applied for 5 ms, TOP = 25°C to 150°C
–
±1.8
–
%
ETOT(LT)
Over full scale of IP , IP applied for 5 ms, TOP = –40°C to 25°C
–
±4
–
%
1See
Characteristic Performance Data page for parameter distributions over temperature range.
2±3 sigma noise voltage.
3V
1
OE(TOP) drift is referred to ideal VIOUT(Q) = /2 VCC.
4Percentage of I . Output filtered.
P
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
X150B PERFORMANCE CHARACTERISTICS1:
Characteristic
Primary Sampled Current
Noise2
Magnetic Offset Error
Total Output Error4
Typ.
Max.
–
150
Unit
A
–
8.7
–
mV/A
–
8.8
–
mV/A
Sens(TOP)LT Full scale of IP applied for 5 ms, TOP = –40°C to 25°C
–
8.6
–
mV/A
mV
ELIN
VOE(TA)
Electrical Offset Voltage3
Full scale of IP applied for 5 ms, TA = 25°C
Min.
–150
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 125°C
VNOISE
Nonlinearity
Test Conditions
IP
SensTA
Sensitivity
TOP = –40°C to 125°C, VCC = 3.3 V, unless otherwise specified
Symbol
TA= 25°C, 10 nF on VIOUT pin to GND
–
3
–
Up to full scale of IP , IP applied for 5 ms
–
<±1
–
%
IP = 0 A, TA = 25°C
–
±5
–
mV
VOE(TOP)HT IP = 0 A, TOP = 25°C to 125°C
–
±5
–
mV
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
–
±10
–
mV
IERROM
IP = 0 A, TA = 25°C, after excursion of 150 A
–
235
–
mA
ETOT(HT)
Over full scale of IP , IP applied for 5 ms, TOP = 25°C to 125°C
–
±2
–
%
ETOT(LT)
Over full scale of IP , IP applied for 5 ms, TOP = –40°C to 25°C
–
±4
–
%
Unit
1See
Characteristic Performance Data page for parameter distributions over temperature range.
2±3 sigma noise voltage.
3V
1
OE(TOP) drift is referred to ideal VIOUT(Q) = /2 VCC.
4Percentage of I . Output filtered.
P
X200B PERFORMANCE CHARACTERISTICS1:
Characteristic
Primary Sampled Current
Noise2
Nonlinearity
Magnetic Offset Error
Total Output Error4
Full scale of IP applied for 5 ms, TA = 25°C
Min.
Typ.
Max.
–200
–
200
A
–
6.6
–
mV/A
Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 85°C
–
6.7
–
mV/A
Sens(TOP)LT Full scale of IP applied for 5 ms, TOP = –40°C to 25°C
–
6.5
–
mV/A
mV
VNOISE
ELIN
VOE(TA)
Electrical Offset Voltage3
Test Conditions
IP
SensTA
Sensitivity
TOP = –40°C to 85°C, VCC = 3.3 V, unless otherwise specified
Symbol
TA= 25°C, 10 nF on VIOUT pin to GND
–
2
–
Up to full scale of IP , IP applied for 5 ms
–
<±1
–
%
IP = 0 A, TA = 25°C
–
±5
–
mV
VOE(TOP)HT IP = 0 A, TOP = 25°C to 85°C
–
±5
–
mV
VOE(TOP)LT IP = 0 A, TOP = –40°C to 25°C
–
±10
–
mV
mA
IERROM
IP = 0 A, TA = 25°C, after excursion of 200 A
–
268
–
ETOT(HT)
Over full scale of IP , IP applied for 5 ms, TOP = 25°C to 85°C
–
±2
–
%
ETOT(LT)
Over full scale of IP , IP applied for 5 ms, TOP = –40°C to 25°C
–
±4
–
%
1See
Characteristic Performance Data page for parameter distributions over temperature range.
sigma noise voltage.
3V
1
OE(TOP) drift is referred to ideal VIOUT(Q) = /2 VCC .
4Percentage of I . Output filtered.
P
2±3
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
8
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Characteristic Performance Data
Data taken using the ACS759LCB-50B
Accuracy Data
Sensitivity versus Ambient Temperature
40
27.5
30
27.0
Sens (mV/A)
VOE (mV)
Electrical Offset Voltage versus Ambient Temperature
20
10
0
26.5
26.0
25.5
25.0
-10
24.5
-20
–50
-25
0
25
50
75
100
125
150
–50
-25
0
25
TA (°C)
Nonlinearity versus Ambient Temperature
75
100
125
150
Symmetry versus Ambient Temperature
1.20
100.40
100.20
1.00
100.00
0.80
ESYM (%)
ELIN (%)
50
TA (°C)
0.60
0.40
99.80
99.60
99.40
99.20
99.00
98.80
0.20
98.60
0
–50
-25
0
25
50
75
100
125
98.40
–50
150
-25
0
25
TA (°C)
50
75
100
125
150
TA (°C)
Magnetic Offset Error versus Ambient Temperature
Total Output Error versus Ambient Temperature
160
4
140
2
0
100
ETOT (%)
IERROM (mA)
120
80
60
-2
-4
40
-6
20
0
–50
-25
0
25
50
75
100
125
-8
–50
150
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Typical Maximum Limit
Mean
Typical Minimum Limit
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
9
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Characteristic Performance Data
Data taken using the ACS759LCB-100B
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
Sensitivity versus Ambient Temperature
30
13.8
25
13.6
Sens (mV/A)
20
VOE (mV)
15
10
5
0
-5
13.4
13.2
13.0
12.8
-10
12.6
-15
-20
–50
-25
0
25
50
75
100
125
12.4
–50
150
-25
0
25
TA (°C)
Nonlinearity versus Ambient Temperature
100
125
150
Symmetry versus Ambient Temperature
100.20
0.60
100.00
ESYM (%)
0.50
ELIN (%)
75
100.40
0.70
0.40
0.30
99.80
99.60
99.40
99.20
0.20
99.00
0.10
98.80
0
–50
-25
0
25
50
75
100
125
98.60
–50
150
-25
0
25
TA (°C)
75
100
125
150
Total Output Error versus Ambient Temperature
250
4
200
2
0
ETOT (%)
150
100
50
0
–50
50
TA (°C)
Magnetic Offset Error versus Ambient Temperature
IERROM (mA)
50
TA (°C)
-2
-4
-6
-25
0
25
50
75
100
125
-8
–50
150
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Typical Maximum Limit
Mean
Typical Minimum Limit
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
10
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Characteristic Performance Data
Data taken using the ACS759LCB-150B
Accuracy Data
Electrical Offset Voltage versus Ambient Temperature
Sensitivity versus Ambient Temperature
30
9.2
25
9.0
Sens (mV/A)
VOE (mV)
20
15
10
5
8.8
8.6
8.4
0
-5
8.2
-10
-15
–50
8.0
-25
0
25
50
75
100
125
150
–50
-25
0
25
TA (°C)
50
75
100
125
150
TA (°C)
Nonlinearity versus Ambient Temperature
Symmetry versus Ambient Temperature
100.40
0.60
100.20
0.50
ESYM (%)
ELIN (%)
100.00
0.40
0.30
0.20
99.80
99.60
99.40
99.20
0.10
99.00
0
–50
-25
0
25
50
75
100
125
98.80
–50
150
-25
0
25
TA (°C)
75
100
125
150
Total Output Error versus Ambient Temperature
6
250
4
2
200
ETOT (%)
IERROM (mA)
Magnetic Offset Error versus Ambient Temperature
300
150
100
50
0
–50
50
TA (°C)
0
-2
-4
-6
-25
0
25
50
75
100
125
-8
–50
150
-25
0
25
50
75
100
125
150
TA (°C)
TA (°C)
Typical Maximum Limit
Mean
Typical Minimum Limit
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Characteristic Performance Data
Data taken using the ACS759LCB-200B
Accuracy Data
Sensitivity versus Ambient Temperature
25
6.9
20
6.8
15
6.7
Sens (mV/A)
VOE (mV)
Electrical Offset Voltage versus Ambient Temperature
10
5
0
6.6
6.5
6.4
-5
6.3
-10
6.2
-15
–60
6.1
-40
-20
0
20
40
60
80
100
–60
-40
-20
0
TA (°C)
Nonlinearity versus Ambient Temperature
100.40
0.45
100.30
60
80
100
100.20
ESYM (%)
0.35
ELIN (%)
40
Symmetry versus Ambient Temperature
0.50
0.40
0.30
0.25
0.20
100.10
100.00
0.15
99.90
99.80
0.10
99.70
0.05
0
–60
-40
-20
0
20
40
60
80
99.60
–60
100
-40
-20
0
TA (°C)
40
60
80
100
Total Output Error versus Ambient Temperature
350
4
300
2
250
0
ETOT (%)
200
150
100
-2
-4
-6
50
0
–60
20
TA (°C)
Magnetic Offset Error versus Ambient Temperature
IERROM (mA)
20
TA (°C)
-40
-20
0
20
40
60
80
-8
–60
100
-45
-20
0
20
40
60
80
100
TA (°C)
TA (°C)
Typical Maximum Limit
Mean
Typical Minimum Limit
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
12
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Characteristic Performance Data
Data taken using the ACS759LCB-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.)
VIOUT (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
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
13
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Characteristic Definitions
Definitions of Accuracy Characteristics
Sensitivity (Sens). The change in device output in response to a
1 A 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–
Δ 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 25ºC,
% 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(3.3V)
VCC
3.3 (V)
s %
and the ratiometric change (%) in sensitivity is defined as:
$Sens($V =
Sens(VCC
VCC
Sens(V
3.3 (V)
s %)
Quiescent output voltage (VIOUT(Q)). The output of the device
when the primary current is zero. For bidirectional devices,
it nominally remains at VCC ⁄ 2. Thus, VCC = 3.3 V translates
into VIOUT(QBI) = 1.65 V. For unidirectional devices, it nominally remains at 0.1 × VCC. Thus, VCC = 3.3 V translates into
VIOUT(QUNI) = 0.33 V. 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 25°C. Accuracy at the zero current flow at 25°C, without the effects of temperature.
0 A over Δ temperature. Accuracy at the zero current flow
including temperature effects.
Half-scale current at 25°C. Accuracy at the the half-scale current
at 25°C, without the effects of temperature.
Half-scale current over Δ temperature. Accuracy at the halfscale current flow including temperature effects.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
14
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
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 ƒ(–3 dB) = 0.35 / tr.
Both tr and tRESPONSE are detrimentally affected by eddy current
losses observed in the conductive IC ground plane.
Output Voltage versus Sampled Current
Total Output Error at 0 A and at Half-Scale Current
Accuracy
Over $Temp erature
Increasing VIOUT(V)
Accuracy
25°C Only
Bidirectional
I (%)
Average
VIOUT
Primary Current
90
Accuracy
Over $Temp erature
Transducer Output
Accuracy
25°C Only
10
0
Rise Time, tr
IP(min)
t
–IP (A)
+IP (A)
Half Scale
IP(max)
0A
Decreasing VIOUT(V)
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.
I (%)
Accuracy
25°C Only
Accuracy
Over $Temp erature
Accuracy
25°C Only
Primary Current
Unidirectional
Average
VIOUT
90
Accuracy
Over $Temp erature
Transducer Output
0
Propagation Time, tPROP
Accuracy
Over $Temp erature
Increasing VIOUT(V)
Accuracy
25°C Only
t
–IP (A)
+IP (A)
Full Scale
0A
IP(max)
Decreasing VIOUT(V)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
15
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
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 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 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
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
16
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
Package CB, 5-pin package, leadform PFF
0.5
R1
R3
0.5 B
14.0±0.2
3.0±0.2
1.50±0.10
4.0±0.2
5
4
4
R2
21.4
3
1º±2°
A
3.5±0.2
0.8
17.5±0.2
1.5
13.00±0.10
1.91
B
Branded
Face
4.40±0.10
PCB Layout Reference View
2.9±0.2
NNNNNNN
TTT - AAA
5º±5°
1
2
+0.060
0.381 –0.030
3
10.00±0.10
3.5±0.2
LLLLLLL
YYWW
1
7.00±0.10
C Standard Branding Reference View
0.51±0.10
1.9±0.2
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
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
B Perimeter through-holes recommended
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
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
17
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
ACS759xCB
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
13.00±0.10
YYWW
4.40±0.10
1
Branded
Face
3.18±0.10
11.0±0.05
+0.060
0.381 –0.030
1
2
3
10.00±0.10
B Standard Branding Reference View
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
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
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
18
ACS759xCB
Thermally Enhanced, Fully Integrated, Hall Effect-Based
Linear Current Sensor IC
With 100 μΩ Current Conductor and Optimized Performance at 3.3 V
Copyright ©2011-2012, Allegro MicroSystems, Inc.
Allegro MicroSystems, Inc. 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 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.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
19