MCP3421A3T-E/CH MCP3421A4T-E/CH MCP3421A5T-E/CH MCP3421A5T-E/OT MCP3421A6T-E/CH MCP3421A7T-E/CH MCP3421AOT-E MCP3421AOT-E/CH MCP3421DM-BFG MCP3421DM-WS