Compact CMOS Op Amp Claims Lowest Circuit Current
According to ROHM, its ultra-compact TLR1901GXZ CMOS op amp is the industry’s lowest operating circuit current. The op amp is built to be used as a measurement-sensing amplifier in space-constrained applications like handheld measurement instruments, wearable devices, and indoor motion detectors, among others.
Addressing the need for more sophisticated control in battery-driven devices, it also offers greater miniaturization and energy savings. The device leverages the company's process, packaging, and proprietary Nano Energy circuit technologies.
Three key requirements are met with the op amp: lower power consumption, higher accuracy, and compact size, maintaining a footprint of less than 1 mm2 using a WLCSP (wafer-level chip-scale package) with a fine ball pitch of 0.35 mm. Offering an industry-leading low operating current of 160 nA (typ.), it not only contributes to high-density mounting in space-constrained applications, but also significantly extends battery life.
Features of the TLR1901GXZ include a low input offset voltage of 0.55 mV (max.), an approximate 45% reduction compared to legacy products. A maximum input offset voltage temperature drift of 7 µV/°C ensures high-accuracy operation.
Operational flexibility can be enhanced by pairing the op amp with ROHM’s ultra-compact general-purpose resistors, such as the MCR004 (0402 metric / 01005 inch) and MCR006 (0603 metric / 0201 inch), for applications like gain adjustment. The MCR004 series lineup includes the MCR004E, an environmentally friendly, lead-free version for sustainable designs.
