Datasheet

Broadcom ACHS-7124-7125-DS101
8
ACHS-7124/7125 Data Sheet
Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 3 kV
RMS
Isolation and
Low-Resistance Current Conductor
Electrical Specifications
ACHS-7124
Unless otherwise stated, all minimum/maximum specifications are over recommended operating conditions, C
F
=1 nF. All
typical values are based on T
A
= +25°C, V
DD
= 5.0V, C
F
= 1 nF.
Parameter Symbol Min. Typ. Max. Units Test Conditions Figure Note
Optimized Accuracy
Range
I
P
–40 — +40 A 4
a
a. The device may be operated at higher primary current levels, I
P
, provided that the Maximum Junction Temperature, T
J(MAX)
is not exceeded.
Sensitivity Sens — 50 — mV/A –40A ≤ I
P
≤ 40A 1
b
b. Refer to Definition of Electrical Characteristics of this data sheet.
Sensitivity Error E
SENS
–3 — +3 % T
A
= 25°C, V
DD
= 5V 1
b
Sensitivity Slope ΔSens — –0.01 — mV/A/°C T
A
= –40°C to 25°C 1
b
Sensitivity Slope ΔSens — 0.01 — mV/A/°C T
A
= 25°C to 110°C 1
b
Zero Current Output Error V
OE
–20 — +20 mV T
A
= 25°C 2
b
Zero Current Output Error
Slope
ΔV
OE
— 0.01 — mV/°C T
A
= –40°C to 25°C 2
b
Zero Current Output Error
Slope
ΔV
OE
— 0.02 — mV/°C T
A
= 25°C to 110°C 2
b
Output Noise V
N(RMS)
— 2 — mV BW = 2 kHz 5
c
c. Output Noise is the noise level of ACHS-7124/7125 expressed in root mean square (RMS) voltage.
Nonlinearity NL — 0.1 — % 3
d
d. Nonlinearity is defined as half of the peak-to-peak output deviation from the best-fit line, expressed as a percentage of the full-scale output
voltage. Refer to Definition of Electrical Characteristics of this data sheet for the complete definition and formula.
Total Output Error E
TOT
—±1.5— %T
A
= 25°C 6
e
e. Total Output Error in percentage is the difference between the measured output voltage at maximum input current (I
PMAX
) and the ideal output
voltage at I
PMAX
divided by the ideal output voltage at I
PMAX
. The Total Output Error's typical value is based on total output error measured
at the point of product release.
Sensitivity Error Lifetime
Drift
E
SENS_DRIFT
—±2—%
b
Total Output Error Lifetime
Drift
E
TOT_DRIFT
—±2—%
b