Rainbow-electronics LM70 Manual de usuario Pagina 1

LM70SPI/MICROWIRE 10-Bit plus Sign Digital TemperatureSensorGeneral DescriptionThe LM70 is a temperature sensor, Delta-Sigma analog-to-digital convert

1.0 Functional Description (Continued)1.5 INTERNAL REGISTER STRUCTUREThe LM70 has three registers, the temperature register, theconfiguration register

2.0 Serial Bus Timing Diagrams3.0 Application HintsTo get the expected results when measuring temperaturewith an integrated circuit temperature sensor

4.0 Typical Applications10122320FIGURE 8. Temperature monitor using Intel 196 processor10122319FIGURE 9. LM70 digital input control using micro-contro

Physical Dimensions inches (millimeters) unless otherwise noted8-Lead Molded Mini Small Outline Package (MSOP)(JEDEC REGISTRATION NUMBER M0-187)Order

NotesNational does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reservesthe r

Connection DiagramsMSOP-8 LLP-810122302TOP VIEWNS Package Number MUA08A10122325TOP VIEWNS Package Number LDA08AOrdering InformationOrder NumberPackage

Typical Application10122303FIGURE 1. COP Microcontroller InterfaceLM70www.national.com3

Absolute Maximum Ratings (Note 1)Supply Voltage −0.3V to 6.0VVoltage at any Pin −0.3V to V++ 0.3VInput Current at any Pin (Note 2) 5 mAPackage Input C

Logic Electrical Characteristics (Continued)Serial Bus Digital Switching CharacteristicsUnless otherwise noted, these specifications apply for V+= 2.6

Electrical CharacteristicsNote 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifica

Electrical Characteristics (Continued)TRI-STATE Test Circuit10122308FIGURE 5. Temperature-to-Digital Transfer Function (Non-linear scale for clarity)1

Typical Performance CharacteristicsAverage Power-On Reset Voltage vs Temperature Static Supply Current vs Temperature10122323 10122321Temperature Erro

1.0 Functional DescriptionThe LM70 temperature sensor incorporates a band-gap typetemperature sensor and 10-bit plus sign ∆Σ ADC (Delta-Sigma Analog-t