LM70

LM70 SPI/MICROWIRE10-Bit plus Sign Digital Temperature Sensor July 2000 LM70 SPI/MICROWIRE™ 10-Bit plus Sign Digital Temperature Sensor General Description The LM70 is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE compatible interface available in LLP and MSOP 8-pin packages. The host can query the LM70 at any time to read temperature. A shutdown mode decreases power consumption to less than 10 µA. This mode is useful in systems where low average power consumption is critical. The LM70 has 10-bit plus sign temperature resolution (0.25˚C per LSB) while operating over a temperature range of −55˚C to +150˚C. The LM70’s 2.65V to 5.5V supply voltage range, low supply current and simple SPI interface make it ideal for a wide range of applications. These include thermal management and protection applications in hard disk drives, printers, electronic test equipment, and office electronics. n Electronic Test Equipment Features n 0.25˚C temperature resolution. n Shutdown mode conserves power between temperature reading n SPI and MICROWIRE Bus interface n MSOP-8 and LLP-8 packages save space Key Specifications j Supply Voltage j Supply Current 2.65V to 5.5V operating shutdown 260µA (typ) 490µA (max) 12µA (typ) j Temperature −40˚C to 85˚C −10˚C to 65˚C −55˚C to 125˚C −55˚C to 150˚C ± 2˚C(max) +1.5/−2˚C(max) +3/−2˚C(max) +3.5/−2˚C(max) Applications n n n n System Thermal Management Personal Computers Disk Drives Office Electronics Accura...