LM70 Datasheet | National Semiconductor

Description The LM70 is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE patible 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 puters Disk Drives Office Electronics Accuracy Simplified Block Diagram DS101223-1 MICROWIRE ® is a registered trademark of National Semiconductor Corporation. © 2000 National Semiconductor Corporation DS101223 .national. Connection Diagrams MSOP-8 LLP-8 DS101223-2 TOP VIEW NS Package Number MUA08A DS101223-25 TOP VIEW NS Package Number LDA08A Ordering Information Order Number LM70CILD-3 LM70CILDX-3 LM70CILD-5 LM70CILDX-5 LM70CIMM-3 LM70CIMMX-3 LM70CIMM-5 LM70CIMMX-5 Package Marking T33 T33 T35 T35 T04C T04C T03C T03C NS Package Number LLP-8, LDA08A LLP-8, LDA08A LLP-8, LDA08A LLP-8, LDA08A MSOP-8, MUA08A MSOP-8, MUA08A MSOP-8, MUA08A MSOP-8, MUA08A Supply Voltage...