PDF EMC1072 Data sheet ( Hoja de datos )

Número de pieza	EMC1072
Descripción	Temperature Sensor
Fabricantes	SMSC
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No Preview Available ! EMC1072 1°C Temperature Sensor with Selectable Address PRODUCT FEATURES Datasheet General Description Features The EMC1072 is a high accuracy, low cost, System Management Bus (SMBus) temperature sensor with pin selectable SMBus address. The device provides ±1° accuracy (max) for external diode temperatures and ±2°C accuracy (max) for the internal diode temperature. The EMC1072 monitors two temperature channels (one external and one internal). Pin Compatible with ADM1032, MAX6649, and LM99 External Temperature Monitors — ±0.25°C typ accuracy (20°C < TDIODE < 110°C) — 0.125°C resolution — Supports 2N3904 and AMD diodes Internal Temperature Monitor — ±0.25°C typ accuracy (-5°C < TA < 100°C) 3.3V Supply Voltage Applications SMBus 2.0 Compliant — Programmable SMBus address Notebook Computers Desktop Computers Industrial Embedded applications Programmable Temperature Limits for ALERT and THERM Available in Small 8-pin MSOP Lead-free RoHS Compliant Package Block Diagram EMC1072 VDD Switching Current DP DN Internal Temp Diode Analog Mux ΔΣ ADC External Temperature Register(s) Internal Temperature Register Status Registers GND Conversion Rate Register Low Limit Registers High Limit Registers THERM Limit Register THERM Hysteresis Register SMCLK SMDATA Configuration Register Interupt Masking SMBus Address Decode ALERT THERM/ADDR SMSC EMC1072 DATASHEET Revision 1.39 (10-11-10) 1 page 1°C Temperature Sensor with Selectable Address Datasheet List of Figures Figure 2.1 Figure 4.1 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 5.5 Figure 8.1 Figure 8.2 EMC1072 Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 SMBus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 System Diagram for EMC1072 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Isolating THERM Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Temperature Filter Step Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Temperature Filter Impulse Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Diode Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8-Pin MSOP / TSSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 EMC1072 Package Markings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 SMSC EMC1072 5 DATASHEET Revision 1.39 (10-11-10) 5 Page 1°C Temperature Sensor with Selectable Address Datasheet 3.3 SMBus Electrical Characteristics Table 3.3 SMBus Electrical Specifications VDD = 3.0V to 3.6V, TA = -40°C to 125°C, all typical values are at TA = 27°C unless otherwise noted. CHARACTERISTIC SYMBOL MIN TYP MAX UNITS CONDITIONS Input High Voltage Input Low Voltage Input High/Low Current VIH VIL IIH / IIL Hysteresis Input Capacitance Output Low Sink Current CIN IOL Clock Frequency Spike Suppression Bus free time Start to Stop Hold Time: Start Setup Time: Start Setup Time: Stop Data Hold Time Data Setup Time Clock Low Period Clock High Period Clock/Data Fall time Clock/Data Rise time Capacitive Load fSMB tSP tBUF tHD:STA tSU:STA tSU:STP tHD:DAT tSU:DAT tLOW tHIGH tFALL tRISE CLOAD SMBus Interface 2.0 VDD V -0.3 0.8 V ±5 uA 420 mV 5 pF 8.2 15 mA SMBus Timing 10 400 kHz 50 ns 1.3 us 0.6 us 0.6 us 0.6 us 0 us 100 ns 1.3 us 0.6 us 300 ns 300 ns 400 pF 5V Tolerant 5V Tolerant Powered or unpowered TA < 85°C SMDATA = 0.4V Min = 20+0.1CLOAD ns Min = 20+0.1CLOAD ns per bus line SMSC EMC1072 11 DATASHEET Revision 1.39 (10-11-10) 11 Page

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