Approximate Scale 1:1
Application 1. The ACS712 outputs an analog signal, V OUT . that varies linearly with the uni- or bi-directional AC or DC primary nd current, I P , within the range specified. C F is recommended for noi management, with values that depend on the application.
ACS712
Description
The Allegro ® ACS712 provides economical and preci solutions for A C or DC current nsing in industrial, automotive, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection.
The device consists of a preci, low-offt, linear Hall nsor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is nd by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the clo proximity of the magnetic signal to the Hall transducer. A preci, proportional voltage is provided by the low-offt, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging.
The output of the device has a positive slope (>V IOUT(Q)) 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 ud for current nsing. The internal resistance of this conductive path is 1.2 mΩ typical, providing low power
Features and Benefits
▪ Low-noi analog signal path
▪ Device bandwidth is t via the new FILTER pin ▪ 5 µs output ri time in respon to step input current ▪ 50 kHz bandwidth
▪ Total output error 1.5% at T A = 25°C, and 4% at –40°C to 85°C ▪ Small footprint, low-profile SOIC8 package ▪ 1.2 mΩ internal conductor resistance
▪ 2.1 kV RMS minimum isolation voltage from pins 1-4 to pins 5-8▪ 5.0 V , single supply operation
▪ 66 to 185 mV/A output nsitivity
▪ Output voltage proportional to AC or DC currents ▪ Factory-trimmed for accuracy
▪ Extremely stable output offt voltage ▪ Nearly zero magnetic hysteresis
▪
Ratiometric output from supply voltage
Fully Integrated, Hall Effect-Bad Linear Current Sensor
with 2.1 kVRMS V oltage Isolation and a Low-Resistance Current Conductor
Continued on the next page…
Package: 8 pin SOIC (suffix LC)
Typical Application
C BYP 0.1 µF
Selection Guide
Part Number Packing*
T OP (°C)Optimized Range, I P
(A)
Sensitivity, Sens (Typ) (mV/A)
ACS712ELCTR-05B-T Tape and reel, 3000 pieces/reel –40 to 85±5185ACS712ELCTR-20A-T Tape and reel, 3000 pieces/reel –40 to 85±20100ACS712ELCTR-30A-T
Tape and reel, 3000 pieces/reel
建设工程管理–40 to 85
±30
66
*Contact Allegro for additional packing options.
loss. The thickness of the copper conductor allows survival of the device at up to 5× overcurrent conditions. The terminals of the conductive path are electrically isolated from the nsor leads (pins 5 through 8). This allows the ACS712 current nsor to be ud in applications requiring electrical isolation without the u of opto-isolators or other costly isolation techniques.
The A CS712 is provided in a small, surface mount SOIC8 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board asmbly process. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-bad solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory.
Description (continued)
Absolute Maximum Ratings
Characteristic
Symbol Notes
Rating Units Supply Voltage V CC 8V Rever Supply Voltage V RCC –0.1V Output Voltage
V IOUT 8V Rever Output Voltage V RIOUT –0.1V Output Current Source I IOUT(Source) 3mA Output Current Sink
I IOUT(Sink)
10mA Overcurrent Transient Tolerance I P 100 total puls, 250 ms duration each, applied at a rate of 1 pul every 100 conds.60A Maximum Transient Send Current I R (max)Junction Temperature, T J < T J (max)60A Nominal Operating Ambient Temperature T A Range E
–40 to 85ºC Maximum Junction T J (max)165ºC Storage Temperature
T stg
–65 to 170
ºC
TÜV America
Certificate Number: U8V 06 05 54214 010
Parameter Specification
Fire and Electric Shock
CAN/CSA-C22.2 No. 60950-1-03
UL 60950-1:2003EN 60950-1:2001
IP+IP+IP–IP–
VCC VIOUT FILTER GND
Terminal List Table
Number Name Description
1 and 2IP+Terminals for current being nd; fud internally 3 and 4IP–Terminals for current being nd; fud internally 5GND Signal ground terminal
6FILTER Terminal for external capacitor that ts bandwidth 7VIOUT Analog output signal 8
VCC
Device power supply terminal
Functional Block Diagram
Pin-out Diagram
COMMON OPERATING CHARACTERISTICS1 over full range of T OP , C F = 1 nF, and V CC = 5 V, unless otherwi specified Characteristic Symbol Test Conditions Min.Typ.Max.Units ELECTRICAL
CHARACTERISTICS
Supply Voltage V CC 4.5 5.0 5.5V Supply Current I CC V CC = 5.0 V, output open6811mA Output Zener Clamp Voltage V Z I CC = 11 mA, T A = 25°C68.3–V Output Resistance R IOUT I IOUT = 1.2 mA, T A=25°C–12ΩOutput Capacitance Load C LOAD VIOUT to GND––10nF Output Resistive Load R LOAD VIOUT to GND 4.7––kΩPrimary Conductor Resistance R PRIMARY T A = 25°C– 1.2–mΩRMS Isolation Voltage V ISORMS Pins 1-4 and 5-8; 60 Hz, 1 minute, T A=25°C2100––V DC Isolation Voltage V ISODC Pins 1-4 and 5-8; 1 minute, T A=25°C–5000–V Propagation Time t PROP I P = I P(max), T A = 25°C, C OUT = open–3–μs Respon Time t RESPONSE I P = I P(max), T A = 25°C, C OUT = open–7–μs Ri Time t r I P = I P(max), T A = 25°C, C OUT = open–5–μs Frequency Bandwidth f–3 dB, T A = 25°C; I P is 10 A peak-to-peak50––kHz Nonlinearity E LIN Over full range of I P–±1±1.5% Symmetry E SYM Over full range of I P9*******%
Zero Current Output Voltage V IOUT(Q)Bidirectional; I P = 0 A, T A = 25°C–V CC×
0.5–V Magnetic Offt Error V ERROM I P = 0 A, after excursion of 5 A–0–mV
Clamping Voltage V CH Typ. –110V CC×
0.9375Typ. +110mV
V CL Typ. –110V CC×
0.0625Typ. +110mV
Power-On Time t PO Output reaches 90% of steady-state level, T J= 25°C, 20 A prent
on leadframe
–35–µs
Magnetic Coupling2–12–G/A Internal Filter Resistance3R F(INT) 1.7kΩ1Device may be operated at higher primary current levels, I P, and ambient, T A, and internal leadframe temperatures, T OP , provided that the Maximum Junction Temperature, T J(max), is not exceeded.
21G = 0.1 mT.
3R F(INT) forms an RC circuit via the FILTER pin.
COMMON THERMAL CHARACTERISTICS1
Min.Typ.Max.Units Operating Internal Leadframe Temperature T OP E range–40–85°C
Value Units Junction-to-Lead Thermal Resistance2RθJL Mounted on the Allegro ASEK 712 evaluation board5°C/W
Junction-to-Ambient Thermal Resistance RθJA Mounted on the Allegro 85-0322 evaluation board, includes the power con-
sumed by the board
柿子英语23°C/W
1Additional thermal information is available on the Allegro website.
2The Allegro evaluation board has 1500 mm2 of 2 oz. copper on each side, connected to pins 1 and 2, and to pins 3 and 4, with thermal vias connect-ing the layers. Performance values include the power consumed by the PCB. Further details on the board are available from the Frequently Asked Questions document on our website. Further information about board design and thermal performance also can be found in the Applications Informa-tion ction of this datasheet.
x05A PERFORMANCE CHARACTERISTICS T OP = –40°C to 85°C1, C F = 1 nF, and V CC = 5 V, unless otherwi specified Characteristic Symbol Test Conditions Min.Typ.Max.Units Optimized Accu
racy Range I P–5–5A
Sensitivity2
Sens TA Over full range of I P, T A = 25°C–185–mV/A Sens TOP Over full range of I P178–193mV/A
Noi V NOISE(PP)Peak-to-peak, T A= 25°C, 185 mV/A programmed Sensitivity,
C F= 4.7 nF, C OUT = open, 20 kHz bandwidth
–45–mV Peak-to-peak, T A = 25°C, 185 mV/A programmed Sensitivity,
C F = 47 nF, C OUT = open, 2 kHz bandwidth
–20–mV Peak-to-peak, T A = 25°C, 185 mV/A programmed Sensitivity,
C F = 1 nF, C OUT = open, 50 kHz bandwidth
–75–mV
Electrical Offt Voltage V OE I P = 0 A–40–40mV Total Output Error3E TOT I P =±5 A, T A = 25°C–荷球
±1.5–% 1Device may be operated at higher primary current levels, I P, and ambient temperatures, T OP, provided that the Maximum Junction Temperature,
T J(max), is not exceeded.
2At –40°C Sensitivity may shift as much 9% outside of the datasheet limits.
3Percentage of I P, with I P = 5 A. Output filtered.
x20A PERFORMANCE CHARACTERISTICS T OP = –40°C to 85°C1, C F = 1 nF, and V CC = 5 V, unless otherwi specified Characteristic Symbol Test Conditions Min.Typ.Max.Units Optimized Accuracy Range I P–20–20A
Sensitivity2
嫩粉色Sens TA Over full range of I P, T A = 25°C–100–mV/A Sens TOP Over full range of I P97–103mV/A
Noi V NOISE(PP)Peak-to-peak, T A= 25°C, 100 mV/A programmed Sensitivity,
C F= 4.7 nF, C OUT = open, 20 kHz bandwidth
–24–mV Peak-to-peak, T A = 25°C, 100 mV/A programmed Sensitivity,
C F = 47 nF, C OUT = open, 2 kHz bandwidth
–10–mV Peak-to-peak, T A = 25°C, 100 mV/A programmed Sensitivity,凉拌包菜丝
C F = 1 nF, C OUT = open, 50 kHz bandwidth
–40–mV
Electrical Offt Voltage V OE I P = 0 A–30–30mV Total Output Error3E TOT I P =±20 A, T A = 25°C–±1.5–% 1Device may be operated at higher primary current levels, I P, and ambient temperatures, T OP, provided that the Maximum Junction Temperature,
合肥公积金管理中心官网T J(max), is not exceeded.
2At –40°C Sensitivity may shift as much 9% outside of the datasheet limits.
3Percentage of I P, with I P = 20 A. Output filtered.
x30A PERFORMANCE CHARACTERISTICS T OP = –40°C to 85°C1, C F = 1 nF, and V CC = 5 V, u
nless otherwi specified Characteristic Symbol Test Conditions Min.Typ.Max.Units Optimized Accuracy Range I P–30–30A
Sensitivity2
Sens TA Over full range of I P , T A = 25°C–66–mV/A Sens TOP Over full range of I P64–68mV/A
Noi V NOISE(PP)Peak-to-peak, T A= 25°C, 66 mV/A programmed Sensitivity,
C F= 4.7 nF, C OUT = open, 20 kHz bandwidth
夜箫
–20–mV Peak-to-peak, T A = 25°C, 66 mV/A programmed Sensitivity,
C F = 47 nF, C OUT = open, 2 kHz bandwidth
–7–mV Peak-to-peak, T A = 25°C, 66 mV/A programmed Sensitivity,
C F = 1 nF, C OUT = open, 50 kHz bandwidth
就业援助–35–mV
Electrical Offt Voltage V OE I P = 0 A–30–30mV Total Output Error3E TOT I P = ±30 A, T A = 25°C–±1.5–% 1Device may be operated at higher primary current levels, I P, and ambient temperatures, T OP, provided that the Maximum Junction Temperature,
T J(max), is not exceeded.
2At –40°C Sensitivity may shift as much 9% outside of the datasheet limits.
3Percentage of I P, with I P = 30 A. Output filtered.
