ACS780 datasheet(5/24 Pages) ALLEGRO

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High-Precision Linear Hall-Effect-Based

Current Sensor IC With 200 µΩ Current Conductor

ACS780xLR

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

COMMON OPERATING CHARACTERISTICS* valid at TOP = –40°C to 150°C and VCC = 5 V, unless otherwise specified

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Supply Voltage

VCC

4.5

5.0

5.5

Supply Current

ICC

Output open

–

Power-On Time

tPO

TA = 25°C, CBYPASS = Open, CL = 1 nF

–

130

–

µs

Undervoltage Lockout (UVLO)

Threshold

VUVLOH

TA = 25°C, VCC rising and device function enabled

–

VUVLOL

TA = 25°C, VCC falling and device function disabled

–

3.5

–

UVLO Enable/Disable Delay

Time

tUVLOE

TA = 25°C, CBYPASS = Open, CL = 1 nF, VCC

Fall Time (5 V to 3 V) = 1.5 µs

–

µs

tUVLOD

TA = 25°C, CBYPASS = Open, CL = 1 nF,

VCC Recover Time (3 V to 5 V) = 1.5 µs

–

µs

Power-On Reset Voltage

VPORH

TA = 25°C, VCC rising

–

2.9

–

VPORL

TA = 25°C, VCC falling

–

2.5

–

Power-On Reset Release Time

tPORR

TA = 25°C, VCC rising

–

µs

Supply Zener Clamp Voltage

TA = 25°C, ICC = 30 mA

6.5

7.5

–

Internal Bandwidth

BWi

Small signal –3 dB, CL = 1 nF, TA = 25°C

–

120

–

kHz

Chopping Frequency

TA = 25°C

–

500

–

kHz

Oscillator Frequency

fOSC

TA = 25°C

–

MHz

OUTPUT CHARACTERISTICS

Propagation Delay Time

tpd

TA = 25°C, CL = 1 nF

–

2.5

–

µs

Rise Time

TA = 25°C, CL = 1 nF

–

µs

Response Time

tRESPONSE

TA = 25°C, CL = 1 nF

–

3.6

–

µs

Output Saturation Voltage

VSAT(HIGH)

TA = 25°C, RLOAD = 10 kΩ to GND

4.7

–

VSAT(LOW)

TA = 25°C, RLOAD = 10 kΩ to VCC

–

400

DC Output Resistance

ROUT

RL=4.7 kΩ from VOUT to GND, VOUT = VCC/2

–

Output Load Resistance

RL(PULLUP)

VOUT to VCC

4.7

–

kΩ

RL(PULLDWN)

VOUT to GND

4.7

–

kΩ

Output Load Capacitance

VOUT to GND

–

Primary Conductor Resistance

RPRIMARY

TA = 25°C

–

200

–

µΩ

Quiescent Output Voltage

VOUT(QBI)

IP = 0 A, TA = 25°C

–

VCC/2

–

VOUT(QU)

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

–

VCC × 0.1

–

Ratiometry Quiescent Output

Voltage Error

RatERRVOUT(Q) Through supply voltage range (relative to VCC = 5 V)

–

Ratiometry Sensitivity Error

RatERRSens

Through supply voltage range (relative to VCC = 5 V)

–

< ±0.5

–

Common-Mode Magnetic Field

Rejection

CMFR

Magnetic field perpendicular to Hall plates

–

–35

–

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

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