ROHM Semiconductor announced the development of the TLR1901GXZ, an ultra-compact CMOS operational amplifier (op amp) that achieves the industry’s lowest operating circuit current. Optimized for use as a sensing amplifier, this IC is ideally suited for space-constrained applications such as handheld measurement instruments, wearable devices, and indoor motion detectors.
As the demand continues to grow for more sophisticated control in battery-driven devices, the importance of sensors that detect parameters such as temperature, humidity, vibration, pressure, and flow rate – along with the op amps used to amplify these sensor signals – continues to rise. At the same time, greater miniaturization and energy savings in applications are a necessary step to realizing a sustainable society –placing similar demands on individual devices as well.
In response to these evolving market needs, ROHM has advanced its process, packaging, and proprietary Nano Energy™ circuit technologies to develop an op amp that addresses three key requirements: lower power consumption, higher accuracy, and compact size. The newly developed TLR1901GXZ achieves an ultra-compact footprint of less than 1mm2 by adopting a WLCSP (Wafer Level Chip Scale Package) with a fine ball pitch of 0.35mm while delivering an industry-leading low operating current of 160nA (typ.). This not only contributes to high-density mounting in space-constrained applications but also significantly extends battery life.
Moreover, the TLR1901GXZ features an exceptionally low input offset voltage of just 0.55mV (max.), ranking among the best in ultra-low current op amps – approx. 45% lower than typical products on the market. A maximum input offset voltage temperature drift of 7uV/°C further ensures high-accuracy performance across the operating temperature range.
Design flexibility can be enhanced by pairing the op amp with ROHM’s ultra-compact general-purpose resistors, such as the MCR004 (0402 mm / 01005 in) and MCR006 (0603 mm / 0201 in), for functions like gain adjustment. The MCR004 series includes the MCR004E, a fully lead-free, environmentally friendly option that supports sustainable designs. Adapter boards featuring SSOP5 package ICs are offered as well to facilitate initial evaluation and replacement considerations.
Going forward, ROHM will continue to pursue further power savings in op amps by advancing both miniaturization and original ultra-low power technologies. At the same time, we are committed to improving device performance by reducing noise and offset, expanding power supply voltage ranges, and contributing to solving social issues through more precise application control.
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