ACS714ELCTR-20A-T Allegro Microsystems Inc, ACS714ELCTR-20A-T Datasheet

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ACS714ELCTR-20A-T

Manufacturer Part Number
ACS714ELCTR-20A-T
Description
IC, LINEAR CURRENT SENSOR, 10mA, 8-SOIC
Manufacturer
Allegro Microsystems Inc
Series
-r
Datasheet

Specifications of ACS714ELCTR-20A-T

Quiescent Current
10mA
Bandwidth
80kHz
Sensor Case Style
SOIC
No. Of Pins
8
Supply Voltage Range
4.5V To 5.5V
Operating Temperature Range
-40°C To +85°C
Polarization
Bipolar
Current - Sensing
±20A
Accuracy
±1.5%
Sensitivity
96 ~ 104 mV/A
Current - Supply
10mA
Sensor Type
Hall Effect
Voltage - Supply
4.5 V ~ 5.5 V
Output
2.5V
Frequency
80kHz
Response Time
5µs
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features and Benefits
▪ Low-noise analog signal path
▪ Device bandwidth is set via the FILTER pin
▪ 5 μs output rise time in response to step input current
▪ 80 kHz bandwidth
▪ Total output error 1.5% typical, at T
▪ Small footprint, low-profile SOIC8 package
▪ 1.2 mΩ internal conductor resistance
▪ 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8
▪ 5.0 V, single supply operation
▪ 66 to 185 mV/A output sensitivity
▪ Output voltage proportional to AC or DC currents
▪ Factory-trimmed for accuracy
▪ Extremely stable output offset voltage
▪ Nearly zero magnetic hysteresis
▪ Ratiometric output from supply voltage
▪ Operating temperature range, –40°C to 150°C
Package: 8 pin SOIC (suffix LC)
ACS714-DS, Rev. 7
Approximate Scale 1:1
Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
TÜV America
Certificate Number:
U8V 06 05 54214 010
A
= 25°C
Application 1. The ACS714 outputs an analog signal, V
that varies linearly with the uni- or bi-directional AC or DC
primary sampled current, I
is recommended for noise management, with values that
depend on the application.
I
P
Typical Application
1
2
3
4
IP+
IP+
IP–
IP–
ACS714
FILTER
VIOUT
GND
VCC
P
, within the range specified. C
Description
The Allegro
solutions for AC or DC current sensing in automotive systems.
The device package allows for easy implementation by the
customer. Typical applications include motor control, load
detection and management, switch-mode power supplies, and
overcurrent fault protection.
The device consists of a precise, low-offset, linear Hall 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 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 voltage is provided by the low-offset,
chopper-stabilized BiCMOS Hall IC, which is programmed
for accuracy after packaging.
The output of the device has a positive slope (>V
when an increasing current flows through the primary copper
conduction path (from pins 1 and 2, to pins 3 and 4), which is
the path used for current sampling. The internal resistance of
this conductive path is 1.2 mΩ typical, providing low power
loss. The thickness of the copper conductor allows survival of
the device at up to 5× overcurrent conditions. The terminals of
Continued on the next page…
8
7
6
5
V
C
1 nF
OUT
F
®
+5 V
ACS714 provides economical and precise
C
0.1 μF
BYP
OUT
F
.
ACS714
IOUT(Q)
)

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ACS714ELCTR-20A-T Summary of contents

Page 1

... Voltage Isolation and a Low-Resistance Current Conductor Features and Benefits ▪ Low-noise analog signal path ▪ Device bandwidth is set via the FILTER pin ▪ 5 μs output rise time in response to step input current ▪ 80 kHz bandwidth ▪ Total output error 1.5% typical 25°C A ▪ ...

Page 2

... The ACS714 is provided in a small, surface mount SOIC8 package. Selection Guide Optimized Range, I Part Number ACS714ELCTR-05B-T ACS714ELCTR-20A-T ACS714ELCTR-30A-T ACS714LLCTR-05B-T ACS714LLCTR-20A-T ACS714LLCTR-30A-T *Contact Allegro for additional packing options. Absolute Maximum Ratings ...

Page 3

... IP− (Pin 4) Terminal List Table Number 1 and 2 3 and Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Functional Block Diagram Coefficient Trim Signal Recovery Sense Trim 0 Ampere Offset Adjust GND ...

Page 4

... Questions document on our website. Further information about board design and thermal performance also can be found in the Applications Informa- tion section of this datasheet. Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor 1 over full range of T ...

Page 5

... Electrical Output Voltage V OE Total Output Error 2 E TOT 1 Device may be operated at higher primary current levels not exceeded. 2 Percentage with Output filtered Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor ...

Page 6

... OUT(Q) Sensitivity Slope ΔSens Electrical Output Voltage V OE Total Output Error 2 E TOT 1 Device may be operated at higher primary current levels (max), is not exceeded Percentage with Output filtered Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor over Range – ...

Page 7

... OUT(Q) Sensitivity Slope ΔSens Electrical Output Voltage V OE Total Output Error 2 E TOT 1 Device may be operated at higher primary current levels (max), is not exceeded Percentage with Output filtered Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor over Range – ...

Page 8

... P 2505 2500 2495 2490 2485 -50 - (°C) A Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Characteristic Performance unless otherwise specified P 10.9 10.8 10.7 10.6 10.5 10.4 10.3 10.2 10.1 10.0 100 ...

Page 9

... 2505 2500 2495 2490 2485 -50 - (°C) A Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Characteristic Performance unless otherwise specified P 10.4 10.2 10.0 9.8 9.6 9.4 9.2 9.0 100 125 150 0.35 ...

Page 10

... P 2510 2505 2500 2495 2490 2485 -50 - (°C) A Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Characteristic Performance unless otherwise specified P 10.2 10.0 9.8 9.6 9.4 9.2 9.0 100 125 150 0.45 ...

Page 11

... Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Accuracy is divided into four areas:  25°C. Accuracy at the zero current flow at 25°C, with- out the effects of temperature.  over Δ temperature. Accuracy at the zero current flow including temperature effects.  ...

Page 12

... Rise Time versus External Filter Capacitance 1200 1000 800 600 400 } Expanded in chart at right 200 0 0 100 200 300 C (nF) F Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor (min), as shown in the 100 1000 C (nF) t (μs) ...

Page 13

... Application 3. This configuration increases gain to 610 mV/A (tested using the ACS714ELC-05A). D1 1N4448W A-to-D Converter C1 Application Overcurrent Fault Latch. Fault threshold set by R1 and R2. This circuit latches an overcurrent fault and holds it until the 5 V rail is powered down. Regulator Clock/Logic Amp Concept of Chopper Stabilization Technique + 100 kΩ ...

Page 14

... R , shown in Appli- F INTFC cation 6. Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor temperature. Therefore, signal attenuation will vary as a function of temperature. Note that, in many cases, the input impedance typical analog-to-digital converter (ADC) can be as INTFC low as 10 kΩ ...

Page 15

... The in for ma tion in clud ed herein is believed rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Package LC, 8-pin SOIC 8° ...

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