收藏本站
ACS713
Fully Integrated, Hall Effect-Based Linear Current Sensor IC
with 2.1 kVRMS Isolation and a Low-Resistance Current Conductor
Improving Sensing System Accuracy Using the FILTER Pin
? V ATT = V IOUT ?
? R INTFC ?
?
?
In low-frequency sensing applications, it is often advantageous
to add a simple RC filter to the output of the device. Such a low-
pass filter improves the signal-to-noise ratio, and therefore the
resolution, of the device output signal. However, the addition of
an RC filter to the output of a sensor IC can result in undesirable
device output attenuation — even for DC signals.
Signal attenuation, ? V ATT , is a result of the resistive divider
effect between the resistance of the external filter, R F (see Appli-
cation 5), and the input impedance and resistance of the customer
interface circuit, R INTFC . The transfer function of this resistive
divider is given by:
.
? R F + R INTFC ?
Even if R F and R INTFC are designed to match, the two individual
resistance values will most likely drift by different amounts over
+5 V
Pin 3 Pin 4
IP– IP–
temperature. Therefore, signal attenuation will vary as a function
of temperature. Note that, in many cases, the input impedance,
R INTFC , of a typical analog-to-digital converter (ADC) can be as
low as 10 k Ω .
The ACS713 contains an internal resistor, a FILTER pin connec-
tion to the printed circuit board, and an internal buffer ampli-
fier. With this circuit architecture, users can implement a simple
RC filter via the addition of a capacitor, C F (see Application 6)
from the FILTER pin to ground. The buffer amplifier inside of
the ACS713 (located after the internal resistor and FILTER pin
connection) eliminates the attenuation caused by the resistive
divider effect described in the equation for ? V ATT . Therefore, the
ACS713 device is ideal for use in high-accuracy applications that
cannot afford the signal attenuation associated with the use of an
external RC low-pass filter.
VCC
Pin 8
Allegro ACS706
Application 5. When a low pass filter is construct-
ed externally to a standard Hall effect device,
a resistive divider may exist between the filter
resistor, R F, and the resistance of the custom-
er interface circuit, R INTFC . This resistive divider
will cause excessive attenuation, as given by the
transfer function for ? V ATT .
0.1 F
Voltage
Regulator
Amp
To all subcircuits
Out
VIOUT
Pin 7
N.C.
Pin 6
R F
Resistive Divider
Input
Application
Interface
Circuit
Low Pass Filter
Gain
Temperature
Coefficient
Offset
C F
R INTFC
Trim Control
+5 V
VCC
Pin 8
IP+ IP+
Pin 1 Pin 2
GND
Pin 5
Application 6. Using the FILTER pin
provided on the ACS713 eliminates
the attenuation effects of the resis-
Hall Current
Drive
Allegro ACS713
tor divider between R F and R INTFC ,
shown in Application 5.
IP+
Pin 1
IP+
Pin 2
IP–
Pin 3
IP–
Pin 4
Sense Temperature
Coefficient Trim
Sense
Trim
Signal
Recovery
0 Ampere
Offset Adjust
Buffer Amplifier
and Resistor
VIOUT
Pin 7
Input
Application
Interface
Circuit
R INTFC
GND
FILTER
Pin 5
Pin 6
C F
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
12
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ACS714LLCTR-50A-T SENSOR CURRENT 50A 5V BI 8SOIC
ACS715LLCTR-20A-T SENSOR CURRENT 20A 5V UNI 8-SOIC
ACS716KLATR-12CB-T IC CURRENT SENSOR 120KHZ 16SOIC
ACS716KLATR-6BB-NL-T IC CURRENT SENSOR 120KHZ 16-SOIC
ACS750SCA-050 SENSOR CURRENT 50A 5V BI 5-CA
ACS756SCA-100B-PFF-T IC HALL EFFECT SENSOR MOD 5PIN
ACS758KCB-150U-PFF-T IC SENSOR CURRENT 150A UNI 3-CB
ACS759LCB-100B-PFF-T SENSOR CURRENT
相关代理商/技术参数
ACS713ELCTR-20A-T 制造商:Allegro MicroSystems 功能描述:Hall Effect-Based Linear Current Sensor
ACS713ELCTR-30A-T 功能描述:SENSOR CURRENT 30A 5V UNI 8-SOIC RoHS:是 类别:传感器，转换器 >> 电流 系列:- 标准包装:10 系列:*
ACS713ELCTR-30A-T 制造商:Allegro MicroSystems 功能描述:Hall Effect-Based Linear Current Sensor
ACS714 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS714_13 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
ACS714ELCTR-05B-T 功能描述:SENSOR CURRENT 5A 5V BI 8-SOIC RoHS:是 类别:传感器，转换器 >> 电流 系列:- 标准包装:10 系列:*
ACS714ELCTR-20A 制造商:Allegro MicroSystems LLC 功能描述:
ACS714ELCTR-20A-T 功能描述:SENSOR CURRENT 20A 5V BI 8-SOIC RoHS:是 类别:传感器，转换器 >> 电流 系列:- 标准包装:10 系列:*