Data Sheet

Broadcom ACHS-712x-DS101
2
ACHS-7121/7122/7123 Data Sheet
Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 3 kV
RMS
Isolation and
Low-Resistance Current Conductor
Functional Diagram
NOTE: The connection of 1 μF bypass capacitor between pins 8 and 5 is recommended.
Pin Description
Typical Application Circuit
A typical application circuit for the ACHS-7121/7122/7123 product series consists of a bypass capacitor and a filter capacitor
as additional external components. On the input side, pins 1 and 2 are shorted together and pins 3 and 4 shorted together.
The output voltage is directly measured from the V
OUT
pin.
Pin Pin Name Description Pin Pin Name Description
1I
P+
Terminals for current being sampled; fused
internally
8V
DD
Supply voltage relative to GND
2I
P+
7V
OUT
Output Voltage
3I
P–
Terminals for current being sampled; fused
internally
6 FILTER Filter pin to set bandwidth
4I
P–
5 GND Output side ground
I
P+
P+
I
I
I
P–
P–
V
DD
V
OUT
FIL
TER
GND
1
2
3
4
8
7
6
5
V
DD
V
OUT
FILTER
GND
5V
CBYPASS
C
F
OUTP
UT
I
P+
P+
I
P+
I
I
I
P–
I
P–
P–