High-Precision Linear Current Sensor IC with 100 µΩ Current Conductor
FEATURES AND BENEFITS (continued)
• Undervoltage lockout for V
CC
below specification
• AEC Q-100 automotive qualified
• UL certified, File No. E316429
DESCRIPTION (continued)
conductive path are electrically isolated from the signal leads (pins
1 through 3). This allows the ACS770 family of sensor ICs to be
used in applications requiring electrical isolation without the use of
opto-isolators or other costly isolation techniques.
The device is fully calibrated prior to shipment from the factory.
The ACS770 family is lead (Pb) free. All leads are plated with 100%
matte tin, and there is no Pb inside the package. The heavy gauge
leadframe is made of oxygen-free copper.
SELECTION GUIDE
Part
Number
[1]
Package
Terminals
Formed
Formed
Formed
Formed
Straight
Formed
Straight
Formed
Straight
Formed
Straight
Formed
Straight
Signal Pins
Formed
Formed
Formed
Formed
Formed
Formed
Formed
Formed
Formed
Formed
Formed
Formed
Formed
Primary Sampled
Current, I
P
(A)
±50
50
±100
100
100
±150
±150
150
150
±200
±200
200
200
Sensitivity
Sens (Typ.)
(mV/A)
40.
80.
20.
40.
40.
13.3
13.3
26.7
26.7
10.
10.
20.
20.
Current
Directionality
Bidirectional
Unidirectional
Bidirectional
Unidirectional
Unidirectional
Bidirectional
Bidirectional
Unidirectional
Unidirectional
Bidirectional
Bidirectional
Unidirectional
Unidirectional
–40 to 85
–40 to 125
34 pieces
per tube
–40 to 150
T
OP
(°C)
Packing
[2]
ACS770LCB-050B-PFF-T
ACS770LCB-050U-PFF-T
ACS770LCB-100B-PFF-T
ACS770LCB-100U-PFF-T
ACS770LCB-100U-PSF-T
[3]
ACS770KCB-150B-PFF-T
ACS770KCB-150B-PSF-T
ACS770KCB-150U-PFF-T
ACS770KCB-150U-PSF-T
ACS770ECB-200B-PFF-T
ACS770ECB-200B-PSF-T
ACS770ECB-200U-PFF-T
ACS770ECB-200U-PSF-T
[1]
Additional
[2]
Contact Allegro
leadform options available for qualified volumes.
for additional packing options.
[3]
ACS770LCB-100U-PSF-T
part variant is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and no-
tice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because
of obsolescence in the near future. Samples are no longer available. Date of status change: June 5, 2017. Deadline for receipt of LAST TIME BUY orders: December 31,
2017. For existing customer transition, and for new customers or new applications, contact Allegro.
High-Precision Linear Current Sensor IC with 100 µΩ Current Conductor
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Forward Output Voltage
Reverse Output Voltage
Output Source Current
Output Sink Current
Nominal Operating Ambient Temperature
Maximum Junction
Storage Temperature
Symbol
V
CC
V
RCC
V
IOUT
V
RIOUT
I
OUT(Source)
I
OUT(Sink)
T
OP
T
J
(max)
T
stg
VIOUT to GND
Minimum pull-up resistor of 500 Ω, from VCC to VIOUT
Range E
Range K
Range L
Notes
Rating
6
–0.5
25
–0.5
3
10
–40 to 85
–40 to 125
–40 to 150
165
–65 to 165
Unit
V
V
V
V
mA
mA
°C
°C
°C
°C
°C
ISOLATION CHARACTERISTICS
Characteristic
Dielectric Strength Test Voltage
[1]
Working Voltage for Basic Isolation
Working Voltage for Reinforced Isolation
[1]
Symbol
V
ISO
V
WFSI
V
WFRI
Notes
Agency type-tested for 60 seconds per
UL standard 60950-1, 2nd Edition
For basic (single) isolation per UL standard 60950-1, 2nd
Edition
For reinforced (double) isolation per UL standard 60950-
1, 2nd Edition
Rating
4800
990
700
636
450
Unit
VAC
VDC or V
pk
V
rms
VDC or V
pk
V
rms
60-second testing is only done during the UL certification process. In production, Allegro conducts 1-second isolation testing according to UL 60950-1, 2nd Edition.
THERMAL CHARACTERISTICS:
May require derating at maximum conditions
Characteristic
Symbol
Test Conditions
[2]
Mounted on the Allegro evaluation board with 2800 mm
2
(1400 mm
2
on component side and 1400 mm
2
on
opposite side) of 4 oz. copper connected to the primary
leadframe and with thermal vias connecting the copper
layers. Performance is based on current flowing through
the primary leadframe and includes the power consumed
by the PCB.
Value
Unit
Package Thermal Resistance
R
θJA
7
°C/W
[2]
Additional
thermal information available on the Allegro website.
TYPICAL OVERCURRENT CAPABILITIES
[3][4]
Characteristic
Overcurrent
Symbol
I
POC
Notes
T
A
= 25°C, 1 second duration, 1% duty cycle
T
A
= 85°C, 1 second duration, 1% duty cycle
T
A
= 150°C, 1 second duration, 1% duty cycle
[3]
Test
[4]
For
Rating
1200
900
600
Unit
A
A
A
was done with Allegro evaluation board. The maximum allowed current is limited by T
J
(max) only.
more overcurrent profiles, please see FAQ on the Allegro website, www.allegromicro.com.
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