MCP6042T-I/SN

The Microchip Technology MCP6042T-I/SN is a dual-channel, ultra-low-power operational amplifier that draws only 600nA per amplifier from a supply voltage as low as 1.4V. The rail-to-rail input and output capability allows the amplifier to handle signals that span the full supply range, making it ideal for single-supply battery-powered applications. The very low input bias current of 1pA and wide common-mode range support high-impedance sensor interfaces. With a gain-bandwidth product of 14kHz, the MCP6042 is optimized for low-frequency applications such as battery current monitoring, sensor signal conditioning, and wearable device analog front ends. The device is unity-gain stable and available in standard SOIC-8 packaging.

The MCP6042 operates as a dual CMOS operational amplifier optimized for micropower applications: 1) Input Stage: The rail-to-rail input stage uses complementary P-channel and N-channel differential pairs that cover the full supply voltage range from VSS-0.3V to VDD+0.3V, with ultra-low 1pA input bias current from CMOS gate leakage. 2) Gain Stage: The internal voltage gain stage provides 110dB open-loop gain, ensuring good DC precision despite the 3mV maximum input offset voltage. 3) Output Stage: The rail-to-rail CMOS output stage can swing from VSS to VDD with light loads, and drives up to 20mA for heavier loads. The 14kHz gain-bandwidth product and 0.003V/us slew rate are optimized for ultra-low 600nA supply current, making the device suitable for DC and low-frequency signal processing.

• Battery current monitoring in portable and wearable electronics
• Temperature sensor signal conditioning with RTD or thermistor
• Wearable health and fitness monitoring devices
• Toll booth tags, RFID readers, and low-power wireless systems
• Portable data loggers and environmental monitoring instruments