The LM94023 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low as 1.5 Volts. It has a dual-gain structure and class AB output, suitable for driving heavy loads. It operates over a wide temperature range of -50°C to +150°C, delivering an output voltage inversely proportional to measured temperature. It has low supply current, making it ideal for battery-powered systems and general temperature sensing applications. The gain of the temperature-to-voltage output transfer function can be set using the gain select pin.
The LM94023 is a precision analog output CMOS temperature sensor that operates from a 1.5 V supply in a tiny 0.8 mm × 0.8 mm micro‑SMD package. It features a Class‑AB output capable of sourcing and sinking current, making it suitable for driving sample‑and‑hold ADC inputs without external buffers. Two gain settings are selected via the GS pin: –5.5 mV/°C (GS=0) or –8.2 mV/°C (GS=1), allowing optimization of temperature sensitivity and supply voltage.
Key specifications include a supply voltage range of 1.5 V to 5.5 V, typical supply current of 5.4 pA, output drive of +50 pA, and operation over –50 °C to +150 °C. The device offers low quiescent current, short‑circuit protected output, and is compatible with the industry‑standard LM20 footprint. Detailed electrical characteristics, absolute maximum ratings, and performance graphs are provided for design reference.
| Supply Voltage | 1.5 V to 5.5 V |
|---|---|
| Supply Current (typical) | 5.4 pA |
| Output Drive | +50 pA |
| Operating Temperature Range | -50 °C to +150 °C |
| Gain (GS=0) | -5.5 mV/°C |
| Gain (GS=1) | -8.2 mV/°C |
The device operates from 1.5 V up to 5.5 V supply voltage.
Two selectable gains are available: –5.5 mV/°C when GS=0 and –8.2 mV/°C when GS=1.
The typical supply current is 5.4 pA.
It can measure temperatures from –50 °C to +150 °C.