Electronics Weekly
Called MCP6C02, the Grade 0 part comes in a 3 x 3mm 8 pin VDFN package with wettable flank plating and has a maximum offset error of ±12µV, while the 6pin SOT-23 version is AEC-Q100 Grade 1.
This max offset is for the 100V/V gain version. There are also 20 and 50V/V versions at ±16 and 14μV max
Operation is over input common modes of +3.0 to +65V (specified), +2.8 to +68V (operating) or -0.3 to +70V (survival), supplies from 2 to 5.5V and 40°C to +125 or +150°C (the latter depending on version).
Low offset error “allows the use of smaller value shunt resistors while also maintaining a high measurement resolution,” according to the company. “This enables a more accurate and energy efficient current measurement solution for those applications exposed to extreme temperatures, like the motor within a vehicle’s water pump.”
Inside the MCP6C02, both differential amplifies are ‘zero-drift’ chopper-stabilised to reduce offsets
This part includes electromagnetic interference filters on the inputs and low-pass filters on the amplifier outputs.
“The EMI filter helps provide added protection against high-frequency electrical interference, such as wireless hotspots,” said Microchip.
ADM01104 is a suitable evaluation board
Applications are foreseen in current-controlled feedback loops for a power supplies, or monitoring motors or batteries.
The MCP6C02 product page is here
