ROHM has released the TLR1901GXZ, a CMOS operational amplifier that combines one of the lowest operating currents available with a footprint of less than 1 mm². The device is aimed at measurement and sensing applications in wearables, handheld instruments, and motion detectors, where energy efficiency and board space are critical.
Ultra-Low Current and Compact Design
Battery-driven devices depend on efficient amplification to handle signals from sensors such as temperature, humidity, vibration, or flow rate. The TLR1901GXZ addresses this need with a typical operating current of just 160 nA, a figure confirmed by ROHM’s own study of ultra-low current op amps below 500 nA. For context, many existing low-power devices consume several microamps, making the new part a strong option for systems that need to operate for years from a coin cell.
The amplifier is packaged in a WLCSP measuring only 0.91 × 0.80 mm with a maximum height of 0.33 mm. This footprint allows engineers to integrate analog amplification into layouts where available board space is extremely limited.
Accuracy Across Temperature
While low current often comes with trade-offs in precision, ROHM has worked to minimise offset error. The device features a maximum input offset voltage of 0.55 mV, around 45% lower than typical ultra-low current alternatives. Drift performance is rated at 7 µV/°C, maintaining accuracy across the full –40 °C to +85 °C operating range. For designers working with small sensor signals, this stability reduces the need for extensive correction.
What Nano Energy™ Means
The device is built using ROHM’s Nano Energy™ technology, a proprietary design approach that combines circuit techniques, process refinements, and layout optimisation to achieve current draw in the nanoamp range. Originally developed to extend the operating time of battery-powered electronics, Nano Energy is also being applied in industrial and automotive fields where reducing power consumption is a growing requirement.
Design Flexibility and Support
The TLR1901GXZ can be paired with ROHM’s ultra-compact resistor series such as the MCR004 (0402 metric) and MCR006 (0603 metric) to set gains without occupying significant board space. A lead-free version, the MCR004E, supports environmentally focused designs. Evaluation is supported by an adapter board (TLR1901GXZ-EVK-001) as well as SSOP5-mounted IC options for quick replacement testing.
Applications and Availability
Target uses include wearables, smart sensors, fire alarms, and industrial monitoring devices. In all cases, the combination of ultra-low current and compact size allows engineers to design smaller, more efficient products.
The TLR1901GXZ is available now through authorised distributors. Click here to compare pricing and availability with oemsecrets.com.
Learn more and read the original article on www.rohm.com
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