ACS758XCB_12 datasheet(6/21 Pages) ALLEGRO

Part #	ACS758XCB

Description	The Allegro ACS758 family of current sensor ICs provides economical and precise solutions for AC or DC current sensing.

PDF	21 Pages

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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Thermally Enhanced, Fully Integrated, Hall Effect-Based

Linear Current Sensor IC with 100 μΩ Current Conductor

ACS758xCB

6

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

COMMON OPERATING CHARACTERISTICS1 valid at T

OP = –40°C to 150°C and VCC = 5 V, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Supply Voltage2

VCC

3

5.0

5.5

V

Supply Current

ICC

Output open

–

10

13.5

mA

Power-On Delay

tPOD

TA = 25°C

–

10

–

μs

Rise Time3

tr

IP step = 60% of IP+, 10% to 90% rise time, TA = 25°C,

COUT = 0.47 nF

–3–

μs

Propagation Delay Time3

tPROP

TA = 25°C, COUT = 0.47 nF

–

1

–

μs

Response Time

tRESPONSE

Measured as sum of tPROP and tr

–4–

μs

Internal Bandwidth4

BWi

–3 dB; TA = 25°C, COUT = 0.47 nF

–

120

–

kHz

Output Load Resistance

RLOAD(MIN)

VIOUT to GND

4.7

–

kΩ

Output Load Capacitance

CLOAD(MAX)

VIOUT to GND

–

10

nF

Primary Conductor Resistance

RPRIMARY

TA = 25°C

–

100

–

μΩ

Symmetry3

ESYM

Over half-scale of Ip

99

100

101

%

Quiescent Output Voltage5

VIOUT(QBI)

Bidirectional variant, IP = 0 A, TA = 25°C

–

VCC/2

–

V

VIOUT(QUNI)

Unidirectional variant, IP = 0 A, TA = 25°C, VIOUT(QUNI) is

ratiometric to VCC

–

0.6

–

V

Ratiometry3

VRAT

VCC = 4.5 to 5.5 V

–

100

–

%

1Device is factory-trimmed at 5 V, for optimal accuracy.

2Devices are programmed for maximum accuracy at 5.0 V VCC levels. The device contains ratiometry circuits that accurately alter the 0 A Output Volt-

age and Sensitivity level of the device in proportion to the applied VCC level. However, as a result of minor nonlinearities in the ratiometry circuit ad-

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

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

3See Characteristic Definitions section of this datasheet.

4Calculated using the formula BWi = 0.35 / tr.

5VIOUT(Q) may drift over the lifetime of the device by as much as ±25 mV.

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