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ACS709
High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
Features and Benefits
? Industry-leading noise performance with 120 kHz
bandwidth through proprietary amplifier and filter
design techniques
? Integrated shield greatly reduces capacitive coupling
from current conductor to die due to high dV/dt, and
prevents offset drift in high-side applications
? Small footprint surface mount QSOP24 package
? 2100 VRMS isolation voltage between primary current
path and sensor IC electronics
? 1.1 m Ω primary conductor resistance for low power loss
? User-settable Overcurrent Fault level
? Overcurrent Fault signal typically responds to an
overcurrent condition in < 2 μ s
? Filter pin capacitor sets analog signal bandwidth
? ±2% typical output error
? 3 to 5.5 V, single supply operation
? Factory trimmed sensitivity, quiescent output voltage,
and associated temperature coefficients
? Chopper stabilization results in extremely stable
quiescent output voltage
? Ratiometric output from supply voltage
Package: 24 pin QSOP (suffix LF)
Description
The Allegro ? ACS709 current sensor IC provides economical
and precise means for current sensing applications in industrial,
automotive, commercial, and communications systems. The
device is offered in a small footprint surface mount package
that allows easy implementation in customer applications.
The ACS709 consists of a precision linear Hall sensor integrated
circuit with a copper conduction path located near the surface
of the silicon die. Applied current flows through the copper
conduction path, and the analog output voltage from the Hall
sensor IC linearly tracks the magnetic field generated by the
applied current. The accuracy of the ACS709 is maximized
with this patented packaging configuration because the Hall
element is situated in extremely close proximity to the current
to be measured.
High level immunity to current conductor dV/dt and stray
electric fields, offered by Allegro proprietary integrated shield
technology, guarantees low output ripple and low offset drift
in high-side applications.
The voltage on the Overcurrent Input (VOC pin) allows
customers to define an overcurrent fault threshold for the
device. When the current flowing through the copper conduction
path (between the IP+ and IP– pins) exceeds this threshold,
Continued on the next page…
Approximate Scale
Typical Application
FAULT_EN
VOC
ACS709 20
FAULT
VIOUT
FILTER
VZCR
GND
I P
1
2
3
4
5
6
7
8
9
10
11
12
IP+
IP+
IP+
IP+
IP+
IP+
IP–
IP–
IP–
IP–
IP–
IP–
NC 24
NC 23
22
21
VCC
19
18
17
16
15
NC 14
NC 13
Fault_EN
C OC
V IOUT
1 nF
A
V CC
R H
R L
330 k Ω
B
C F
0.1 μ F
R H , R L
C F
C OC
A
B
Sets resistor divider reference for V OC
Noise and bandwidth limiting filter capacitor
Fault delay setting capacitor, 22 nF maximum
Use of capacitor required
Use of resistor optional
ACS709-DS, Rev. 2
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ACS709LLFTR-10BB-T 功能描述:SENSOR CURRENT 10A 制造商:allegro microsystems, llc 系列:- 包装:带卷（TR） 零件状态:不適用於新設計 用于测量:AC/DC 传感器类型:霍尔效应，开环 电流 - 检测:10A 通道数:1 输出:比率，电压 灵敏度:85mV/A 频率:DC ~ 120kHz 线性度:±0.25% 精度:±2% 电压 - 电源:4 V ~ 5.5 V 响应时间:4μs 电流 - 电源（最大值）:14.5mA 工作温度:-40°C ~ 150°C 极化:双向 安装类型:表面贴装 封装/外壳:24-QSOP 标准包装:7,500
ACS709LLFTR-20BB-T 功能描述:SENSOR CURR 37.5A 5V BI 24QSOP RoHS:是 类别:传感器，转换器 >> 电流 系列:- 标准包装:10 系列:*
ACS709LLFTR-20BB-T 制造商:Allegro MicroSystems 功能描述:Current Sensor IC
ACS709LLFTR-35BB-T 功能描述:SENSOR CURRENT 75A 5V BI 24QSOP- RoHS:是 类别:传感器，转换器 >> 电流 系列:- 标准包装:10 系列:*
ACS709LLFTR-35BB-T 制造商:Allegro MicroSystems LLC 功能描述:Current Sensor IC
ACS709LLFTR-35BB-TMxx 制造商:Allegro MicroSystems LLC 功能描述:Fast Fault Response Current Sensor IC 制造商:Allegro Microsystems 功能描述:IC, ACS709LLFTR-35BB-TMXX
ACS710 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:120 kHz Bandwidth, High Voltage Isolation Current Sensor with Integrated Overcurrent Detection
ACS710KLATR-10BB-NL-T 功能描述:SENSOR CURRENT 10A 制造商:allegro microsystems, llc 系列:- 零件状态:不適用於新設計 用于测量:AC/DC 传感器类型:霍尔效应，开环 电流 - 检测:10A 通道数:1 输出:比率，电压 灵敏度:85mV/A 频率:120kHz 线性度:±0.25% 精度:±1.6% 电压 - 电源:3 V ~ 5.5 V 响应时间:4μs 电流 - 电源（最大值）:14.5mA 工作温度:-40°C ~ 125°C（TA） 极化:双向 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 标准包装:3,000