If you look at the part numbers for Current Sensor ICs from Allegro MicroSystems, you might see a packaging code in the ordering part number, such as ACS732KLATR-40AB-T. “LA” is the packaging code, which refers to 16-Pin SOICW.
Here is the table for comparison of those packaging information.
|Package Descriptor||SOICW-16 (LA)||SOICW-16 (MA)||SOICW-16 (MC)||SOIC-8 (LC1)||SOIC-8 (LC2)||QFN-12 (EXB)||7-pin PSOF (LR)||5-pin (CB)|
|Conductor Resistance||0.85 mΩ||0.85 mΩ||0.27 mΩ||1.2 mΩ||0.65 mΩ||0.6 mΩ||0.2 mΩ||0.1 mΩ|
|Dielectric Strength||RMS3600 V||RMS5000 V||RMS5000 V||RMS2400 V||RMS2400 V||NA||NA||RMS4800 V|
|Working Voltage||DC870 V / RMS616 V||DC1550V / RMS1097 V||DC1618 V / RMS1144 V||DC420 V / RMS297 V||DC420 V / RMS297 V||DC100 V / RMS70 V||DC100 V / RMS70 V||DC1358 V / RMS700 V|
For the three SOIC16 offered by manufacturer – LA/MA/MC, which all call out 16SOIC, Below is the difference for these.
LA has the highest sensitivity with the Hall element closest to the conductor. Fill-chip locates top of die closest to the leadframe.
MA has high internal isolation . 2 layers of polyimide insulation and 3 layers of insulating adhesive.
MC has the lowest internal conductor resistance. Longer creepage for better working voltage.