GenevaSTMicroelectronics announced a series of precision digital-output temperature sensors, operating over the -55° to +125°C temperature range for low-power applications in a broad range of product areas.
The STxx75 devices are software-compatible drop-in replacements for industry-standard LM75, DS75 and TCN75A parts, and complement ST's STLM20 analog temperature sensor, now being used in several mobile phone designs.
The digital sensors, in standard 8-lead TSSOP and SO-8 packages, are intended for use in any control application where a processor with an I²C bus/SMBus needs to take action based on an accurate digital reading of the local temperature, or where an alarm or interrupt is required when a preset temperature level is reached. They use a band-gap temperature sensor, with a programmable 9-bit to 12-bit sigma-delta A/D converter to digitize the temperature reading to a resolution of up to 0.0625°C. The STTS75 devices are factory-calibrated and require no external components.
Accuracy is ±3 degrees over the full temperature range, and ±2 degrees from -25 to +100°C. The sensors are designed for a supply voltage range of 2.7-V to 5.5-V and have a low operating current of 75-µA (typical) at 3.3-V. In the power-saving shutdown mode the standby current is a very low 1µA maximum. Power-up defaults enable standalone operation as a thermostat, and both temperature and hysteresis values are programmable.
Pricing: $0.70 in quantities of 1,000.
Availability: In volume.
Datasheets: STTS75, STLM75, STDS75, and STCN75.