ACS37002: 400 kHz, High Accuracy Current Sensor with Pin-Selectable Gains

Description

The ACS37002 is a 400kHz fully integrated Hall-Effect current sensor with very high accuracy, making it ideal for use in control loops of the most demanding power conversion applications. Current flows through the internal conductor coupling the magnetic field generated to the Hall sensor IC. As a result of no physical connection between the current and the IC, high voltage isolation is achieved. The current is sensed differentially by two Hall plates that subtract out interfering external common-mode magnetic fields. The sensor is factory-trimmed to provide high accuracy over the entire operating range without the need for customer programming.

The sensor has an analog output and a reference output for signal integrity in noisy environments. A fast over-current fault output is included, having a user-configurable threshold via an analog input pin, providing short- circuit detection and enhanced system protection. The sensor also has four user-selectable gain options in the same device with two logic inputs without the need of extra components. This provides designers flexibility, and minimizes the overall bill-of-material for systems that need different current sensing ranges.

The ACS37002 is available in three different SOICW-16 packages:

  • LA package is optimized for higher sensitivity and lower noise;
  • MA package provides high isolation of 4.8 kVrms;
  • MC package is Allegro’s newest, combining best-in-class conductor resistance of 0.27 mOhm and highest isolation rating of 5 kVrms for applications where ultra-low power loss and high reinforced isolation are needed.

Top Features

  • Wide Operating Bandwidth 400kHz
  •  Internal conductor resistance as low as 0.27mΩ (MC package)
  • 1% Sensitivity error from -40 to 125ºC (KMA version)
  • Pin-selectable Gain Options (4)
  • Fast over-current detection 1.5µs max response time

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
ASEK37002LMA-BB-3B DEMO BOARD -20°C to 85°C No -- New Contact your
local sales rep
Check
Distributor Stock
ASEK37002LMA-BB-5B DEMO BOARD -20°C to 85°C No -- New Contact your
local sales rep
Check
Distributor Stock
ACS37002KMABTR-050B3 16-lead SOIC -40°C to 125°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002KMABTR-050B5 16-lead SOIC -40°C to 125°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002LLAATR-015B3 16-lead SOIC -40°C to 150°C Yes View Data Contact factory Contact your
local sales rep
Check
Distributor Stock
ACS37002LLAATR-015B5 16-lead SOIC -40°C to 150°C Yes View Data Contact factory Contact your
local sales rep
Check
Distributor Stock
ACS37002LLAATR-025B5 16-lead SOIC -40°C to 150°C Yes View Data Contact factory Contact your
local sales rep
Check
Distributor Stock
ACS37002LLAATR-025U3 16-lead SOIC -40°C to 150°C Yes View Data Contact factory Contact your
local sales rep
Check
Distributor Stock
ACS37002LMABTR-050B3 16-lead SOIC -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002LMABTR-050B5 16-lead SOIC -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002LMABTR-050U3 16-lead SOIC -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002LMABTR-050U5 16-lead SOIC -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002LMABTR-066B3 16-lead SOIC -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002LMABTR-066B5 16-lead SOIC -40°C to 150°C -- View Data New Contact your
local sales rep
Check
Distributor Stock
ACS37002LMABTR-066U5 16-lead SOIC -40°C to 150°C -- View Data New Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

LA-MC-MA packaging image

Packaging

16-Pin SOICW MC Package

16-Pin SOICW MA Package

16-Pin SOICW LA Package

Design Support Tools

ASEK37002 Eval Board User Manual