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Allegro MicroSystems
Allegro MicroSystems
Allegro MicroSystems
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Current Sensor

Allegro MicroSystems

High bandwidth, fast fault response current sensor IC in a thermally enhanced package.

Product Description

The Allegro® ACS709 current sensor IC provides economical and precise means for current sensing applications in industrial, automotive, commercial, and communications systems. The device is offered in a small footprint surface mount package that allows easy implementation in customer applications.

The ACS709 consists of a precision linear Hall sensor integrated circuit with a copper conduction path located near the surface of the silicon die. Applied current flows through the copper conduction path, and the analog output voltage from the Hall sensor IC linearly tracks the magnetic field generated by the applied current. The accuracy of the ACS709 is maximized with this patented packaging configuration because the Hall element is situated in extremely close proximity to the current to be measured.

  • Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt, and prevents offset drift in high-side applications
  • 2100 VRMS isolation voltage between primary current path and sensor IC electronics
  • User-settable Overcurrent Fault level
  • Overcurrent Fault signal typically responds to an overcurrent condition in <2µs
  • Filter pin capacitor sets analog signal bandwidth
  • ±2% typical output error
  • Factory trimmed sensitivity, quiescent output voltage, and associated temperature coefficients
  • Chopper stabilization results in extremely stable quiescent output voltage
  • Ratiometric output from supply voltage
  • Industrial
  • Automotive
  • Commercial
  • Communications systems
  • Current - Sensing:20A ~ 37.5A
  • Current - Supply (Max):14.5mA
  • For Measuring:AC/DC
  • Frequency:DC ~ 120kHz
  • Linearity:±0.25%
  • Mounting Type:Surface Mount
  • Number of Channels:1
  • Operating Temperature:-40°C ~ 150°C
  • Output:Ratiometric, Voltage
  • Package / Case:24-SSOP (0.154", 3.90mm Width)
  • Polarization:Bidirectional
  • Response Time:4µs
  • Sensitivity:28mV/A ~ 56mV/A
  • Sensor Type:Hall Effect, Open Loop
  • Supplier Device Package:24-QSOP
  • Voltage - Supply:3V ~ 5.5V

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ACS709LLFTR-35BB-TACS709LLFTR-35BB-TSENSOR CURRENT HALL 37.5A AC/DC AC/DCHall Effect, Open Loop37.5A124-SSOP (0.154", 3.90mm Width)RoHS
ACS709LLFTR-20BB-TACS709LLFTR-20BB-TSENSOR CURRENT HALL 20A AC/DC AC/DCHall Effect, Open Loop20A124-SSOP (0.154", 3.90mm Width)RoHS

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Associated Product
Allegro MicroSystems ASEK709LLF-20BB-T-DK
Category: Semiconductors, Development Tools-Development Boards, Kits, Programmers-Evaluation Boards - Sensors