ACS704ELC-005 Allegro Microsystems Inc, ACS704ELC-005 Datasheet - Page 18

• Manufacturer Part Number: ACS704ELC-005
• Description: SENSOR CURRENT 5A 5V BI 8-SOIC
• Manufacturer: Allegro Microsystems Inc
• Series: -r

Specifications of ACS704ELC-005

• 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: 8µs
• Polarization: Bidirectional
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / Rohs Status: Contains lead / RoHS non-compliant

The Effect of PCB Layout on ACS704 Electrical Performance
Eight different PC boards were fabricated to characterize the effect of PCB design on the operating junction temperature of the
Hall-effect IC inside of the ACS704. These PC boards are shown in the figure below.
were conducted with the following test conditions:

 14 gauge wires were used to connect a power supply to a single PC board. These wires carry the 15 A DC primary current during
 A 15 A DC primary current was applied to a single PC board containing an ACS704 device. This current flowed from pins 1 and
 A 1 mA current was forced from the GND pin to the VCC pin by a Fluke 179 True RMS Multimeter. This was the only power
 The voltage required to force the 1 mA current from the GND pin to the VCC pin was measured after applying the 15 A primary
ACS704ELC005-DS, Rev. 8
Tests were conducted at ambient temperature, T
the tests.
2 to pins 3 and 4 of the ACS704 package.
applied to pins 5-8 of the ACS704 package during testing.
current for approximately 25 minutes. A graph similar to the graph below was used to determine the junction temperature of the
ACS704.
An ACS704 device was soldered onto each PC board before beginning the thermal testing. Thermal management tests
Voltage vs. Temperature Curve used to Determine Die Junction Temperature
2 oz. Cu on one side of board
ACS704ELC-005
A
= 20C. All tests were conducted in still air.
2 oz. Cu on both sides of board
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
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