ACS709 datasheet(4/16 Pages) ALLEGRO

4 / 16 page

High Bandwidth, Fast Fault Response Current Sensor IC

In Thermally Enhanced Package

ACS709

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

COMMON OPERATING CHARACTERISTICS Valid at TA = –40°C to 150°C, VCC= 5 V, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

ELECTRICAL CHARACTERISTICS

Supply Voltage1

VCC

–

5.5

Nominal Supply Voltage

VCCN

–5

–

Supply Current

ICC

VIOUT open, ¯F¯¯A¯U¯¯L¯¯T¯ pin high

–

14.5

Output Capacitance Load

CLOAD

VIOUT pin to GND

–

Output Resistive Load

RLOAD

VIOUT pin to GND

–

kΩ

Magnetic Coupling from Device Conductor

to Hall Element

MCHALL

Current flowing from IP+ to IP– pins

–

9.5

–

G/A

Internal Filter Resistance2

RF(INT)

–

1.7

–

kΩ

Primary Conductor Resistance

RPRIMARY

TA = 25°C

–

1.1

–

mΩ

ANALOG OUTPUT SIGNAL CHARACTERISTICS

Full Range Linearity3

ELIN

IP = ±IP0A

–0.75

±0.25

0.75

Symmetry4

ESYM

IP = ±IP0A

99.1

100

100.9

Bidirectional Quiescent Output

VOUT(QBI)

IP = 0 A, TA = 25°C

–

VCC×0.5

–

TIMING PERFORMANCE CHARACTERISTICS

VIOUT Signal Rise Time

TA = 25°C, Swing IP from 0 A to IP0A,

no capacitor on FILTER pin, 100 pF from

VIOUT to GND

–3

–

μs

VIOUT Signal Propagation Time

tPROP

TA = 25°C, no capacitor on FILTER pin,

100 pF from VIOUT to GND

–1

–

μs

VIOUT Signal Response Time

tRESPONSE

TA = 25°C, Swing IP from 0 A to IP0A,

no capacitor on FILTER pin, 100 pF from

VIOUT to GND

–4

–

μs

VIOUT Large Signal Bandwidth5

f3dB

–3 dB, TA = 25°C, no capacitor on FILTER

pin, 100 pF from VIOUT to GND

–

120

–

kHz

Power-On Time

tPO

Output reaches 90% of steady-state level,

no capacitor on FILTER pin, TA = 25°C

–35

–

μs

OVERCURRENT CHARACTERISTICS

Setting Voltage for Overcurrent Switchpoint6

VOC

VCC×0.25

–

VCC×0.4

Signal Noise at Overcurrent

Comparator Input

INCOMP

–±1

–

Overcurrent Fault Switchpoint Error7,8

EOC

Switchpoint in VOC safe operating area;

assumes INCOMP = 0 A

–±5

–

Overcurrent ¯F¯¯A¯U¯¯L¯¯T¯ Pin Output Voltage

V¯F¯¯A¯U¯¯L¯¯T¯

1 mA sink current at ¯F¯¯A¯U¯¯L¯¯T¯ pin

–

0.4

Fault Enable (FAULT_EN Pin) Input Low

Voltage Threshold

VIL

–

0.1 × VCC

Fault Enable (FAULT_EN Pin) Input High

Voltage Threshold

VIH

0.8 × VCC

––

Fault Enable (FAULT_EN Pin) Input

Resistance

RFEI

–1

–

MΩ

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