Features • 0.25°C temperature resolution. • Shutdown mode conserves power between temperature reading • SPI and MICROWIRE Bus interface • MSOP-8 and LLP-8 packages save space • UL Recognized Component 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. Key Specification Supply Voltage   2.65V to 5.5V Supply Current operating 260 µA (typ)     490 µA (max)   shutdown 12 µA (typ) Temperature Accuracy -40°C to 85°C ±2°C(max)   -10°C to 65°C +1.5/-2°C(max)   -55°C to 125°C +3/-2°C(max)   -55°C to 150°C +3.5/-2°C(max) Applications • System Thermal Management • Personal Computers • Disk Drives • Office Electronics • Electronic Test Equipment

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Datasheet

Title		Size	Date	Other Language
	LM70 SPI/MICROWIRE 10-Bit plus Sign Digital Temperature Sensor	694 Kbytes	10-Feb-06	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1256: Application Note 1256 Tiny Temperature Sensors for Portable Systems	66 Kbytes	1-Oct-02

More Application Notes

Title		Size	Date	Other Language
	AN-1155: Application Note 1155 A Simple Software I2C Routine for the COP8	82 Kbytes	15-May-04

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM70CILD-3	CS065	2	38968	52	0	4402000	1	1249079519
LM70CILD-5	CS065	2	38968	52	0	4402000	1	1249079519
LM70CILDX-3	CS065	2	38968	52	0	4402000	1	1249079519
LM70CILDX-5	CS065	2	38968	52	0	4402000	1	1249079519
LM70CIMM-3	CS065	2	38968	52	0	4402000	1	1249079519
LM70CIMM-5	CS065	2	38968	52	0	4402000	1	1249079519
LM70CIMMX-3	CS065	2	38968	52	0	4402000	1	1249079519
LM70CIMMX-5	CS065	2	38968	52	0	4402000	1	1249079519

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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