ACS711ELCTR-25AB-T【PDF 4/16 页】SENSOR CURRENT 25A 3.3V 8-SOIC

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ACS711

Hall Effect Linear Current Sensor with Overcurrent

Fault Output for < 100 V Isolation Applications

COMMON OPERATING CHARACTERISTICS Valid across the full range of T A for the LC package and at T A = 25°C for the EX package,

V CC = 3.3 V, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

ELECTRICAL CHARACTERISTICS

Supply Voltage 1

V CC

3

3.3

5.5

V

Supply Current

Output Capacitance Load

Output Resistive Load

Primary Conductor

Resistance

VIOUT Rise Time

Propagation Delay Time

Response Time

I CC

C LOAD

R LOAD

R IP

t r

t PROP

t RESPONSE

V CC = 3.3 V, output open

VIOUT to GND

VIOUT to GND

EX package

LC package, T A = 25°C

I P = I PMAX , T A = 25°C, COUT = open

I P = I P (max), T A = 25°C, COUT = open

I P = I P (max), T A = 25°C, COUT = open

–

–

15

–

–

–

–

–

4

–

–

0.6

1.2

3.5

1.2

4.6

5.5

1

–

–

–

–

–

–

mA

nF

k Ω

m Ω

m Ω

μ s

μ s

μ s

Internal

Bandwidth 2

BW I

–3 dB, T A = 25°C

–

100

–

kHz

Nonlinearity

Symmetry

VIOUT Saturation Voltages

Quiescent Output Voltage

Power-On Time

E LIN

E SYM

V IOH

V IOL

V IOUT(Q)

t PO

Over full range of I P

Apply full scale I P

I P = 0 A, T A = 25°C

Output reaches 90% of steady-state level, T A = 25°C,

20 A present on primary conductor

–

–

V CC –

0.3

–

–

–

±1

100

–

–

V CC / 2

35

–

–

–

0.3

–

–

%

%

V

V

V

μ s

ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ Pin Characteristics

ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ Operating Point

ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ Output Pullup

Resistor

ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ Output Voltage

I FAULT

R PU

V OH

–

1

–

± 1 x I P

–

V CC –

0.3

–

–

–

A

k Ω

V

V OL

R PU = 1 k Ω

–

0.3

–

V

ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ Response Time

V CC Off Voltage Level for

Fault Reset 3

V CC Off Duration for

Fault Reset 3

t FAULT

V CCFR

t CCFR

Measured from | I P | > | I FAULT | to V FAULT ≤ V OL

–

–

100

1.3

–

–

–

200

–

μ s

mV

μ s

1 Devices are programmed for maximum accuracy at 3.3 V V CC levels. The device contains ratiometry circuits that accurately alter the 0 A Output

Voltage and Sensitivity level of the device in proportion to the applied V CC level. However, as a result of minor nonlinearities in the ratiometry circuit

additional output error will result when V CC varies from the 3.3 V V CC level. Customers that plan to operate the device from a 5 V regulated supply

should contact their local Allegro sales representative regarding expected device accuracy levels under these bias conditions.

2 Calculated using the formula BW I = 0.35 / t r .

ˉˉˉˉLˉˉ

3 After the F A U ˉˉ T pin is latched low, the only way to reset it is through a power-off and power-on cycle on the VCC pin. For fault reset, V

below V CCFR for a period greater than t CCFR before settling to the normal operation voltage (3 to 5.5 V).

Allegro MicroSystems, LLC

115 Northeast Cutoff

CC must stay

4

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

1.508.853.5000; www.allegromicro.com

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