ACS706ELC-05C Allegro Microsystems Inc, ACS706ELC-05C Datasheet - Page 16

• Manufacturer Part Number: ACS706ELC-05C
• Description: SENSOR CURRENT 5A 5V BI 8-SOIC
• Manufacturer: Allegro Microsystems Inc
• Series: -r

Specifications of ACS706ELC-05C

• Current - Sensing: ±5A
• Accuracy: ±1%
• Sensitivity: 133mV/A
• Current - Supply: 8mA
• Sensor Type: Hall Effect
• Voltage - Supply: 4.5 V ~ 5.5 V
• Output: 2.5V
• Frequency: 50kHz
• Response Time: 6µs
• Polarization: Bidirectional
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 620-1164-2; ACS706ELC-005

Transient Common-Mode Voltage Rejection in the ACS706
ACS706ELC05C-DS, Rev. 3
In order to quantify transient common-mode voltage rejection for the ACS706, a device was soldered onto a printed
circuit board. A 0.1 μF bypass capacitor and a 5 V dc power supply were connected between VCC and GND (pins 8 and
5) for this device. A 10 kΩ load resistor and a 0.01 μF capacitor were connected in parallel between the VOUT pin and
the GND pin of the device (pins 7 and 5).
A function generator was connected between the primary current conductor (pins 1 thru 4) and the GND pin of
the device (pin 5). This function generator was configured to generate a 10 V peak (20 V peak-to-peak) sine
wave between pins 1-4 and pin 5. Note that the sinusoidal stimulus was applied such that no electrical current
would flow through the copper conductor composed of pins 1-4 of this device.
The frequency of this sine wave was varied from 60 Hz to 5 MHz in discrete steps. At each frequency, the
statistics feature of an oscilloscope was used to measure the voltage variations (noise) on the ACS706 output
in mV (peak to peak). The noise was measured both before and after the application of the stimulus. Transient
common-mode voltage rejection as a function of frequency is shown in the following figure.
ACS706 Schematic Diagram of the Circuit used to Measure Transient Rejection
–30
–35
–40
–45
–50
–55
–60
freq=variable
V
OUT
V
=20VPP
OUT
=0V
V1
0.06
1
Frequency of 20 V Peak-to-Peak Stimulus
1
2
3
4
ACS706ELC-05C
Applications Information
10
I
P
100
300
8
7
6
5
600
Output
C3
C=0.01µF
800
R=10kΩ
R0
C=0.1µF
1000 3000 5000
C0
(kHz)
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Ground
Vcc
VDC=5V
GND
V0
15