ACS710 데이터 시트보기 (PDF) - Allegro MicroSystems

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ACS710

120 kHz Bandwidth, High-Voltage Isolation Current Sensor with Integrated Overcurrent Detection

Allegro MicroSystems 

ACS710

120 kHz Bandwidth, High-Voltage Isolation

Current Sensor with Integrated Overcurrent Detection

PERFORMANCE CHARACTERISTICS (continued): TA Range K, valid at TA = – 40°C to 125°C, VCC = 5 V, unless otherwise specified

X25CB CHARACTERISTICS

Optimized Accuracy Range1

IPOA

–25

–

25

A

Linear Sensing Range

Noise2

IR

–75

–

VNOISE(rms) TA = 25°C, Sens = 28 mV/A, Cf = 0, CLOAD = 4.7 nF, RLOAD open

–

1

75

A

–

mV

Sensitivity3

Sens

IP = 25 A, TA = 25°C

IP = 25 A, TA = 25°C to 125°C

–

28

–

27.9

–

mV/A

–

mV/A

IP = 25 A, TA = – 40°C to 25°C

–

28.5

–

mV/A

Electrical Offset Voltage

Variation Relative to

VOUT(QBI)4

IP = 0 A, TA = 25°C

VOE

IP = 0 A, TA = 25°C to 125°C

IP = 0 A, TA = – 40°C to 25°C

–

±3

–

mV

–

±12

–

mV

–

±18

–

mV

Total Output Error5

ETOT

Over full scale of IP OA, IP applied for 5 ms, TA = 25°C to 125°C

Over full scale of IP OA, IP applied for 5 ms, TA = – 40°C to 25°C

–

±2.9

–

–

±5.2

–

%

%

1 Although the device is accurate over the entire linear range, the device is programmed for maximum accuracy over the range defined by IPOA .

The reason for this is that in many applications, such as motor control, the start-up current of the motor is approximately three times higher than the

running current.

2 Vpk-pk noise (6 sigma noise) is equal to 6 × VNOISE(rms). Lower noise levels than this can be achieved by using Cf for applications requiring narrower

bandwidth. See Characteristic Performance page for graphs of noise versus Cf and bandwidth versus Cf.

3 This parameter can drift by as much as 2.4% over the lifetime of this product.

4 This parameter can drift by as much as 13 mV over the lifetime of this product.

5 This parameter can drift by as much as 2.5% over the lifetime of this product.

Allegro MicroSystems, LLC

9

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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