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ADT7461ARMZ-2R Datasheet(PDF) 1 Page - ON Semiconductor |
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ADT7461ARMZ-2R Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 20 page © Semiconductor Components Industries, LLC, 2014 March, 2014 − Rev. 8 1 Publication Order Number: ADT7461/D ADT7461 +15C Temperature Monitor with Series Resistance Cancellation The ADT7461 is a dual-channel digital thermometer and under/over temperature alarm intended for use in PCs and thermal management systems. It is pin- and register-compatible with the ADM1032. The ADT7461 has three additional features: series resistance cancellation (where up to 3 k W (typical) of resistance in series with the temperature monitoring diode may be automatically cancelled from the temperature result, allowing noise filtering); configurable ALERT output; and an extended, switchable temperature measurement range. The ADT7461 can accurately measure the temperature of a remote thermal diode to ±1°C and the ambient temperature to ±3°C. The temperature measurement range defaults to 0 °C to +127°C, compatible with the ADM1032, but can be switched to a wider measurement range of −55 °C to +150 °C. The ADT7461 communicates over a 2-wire serial interface compatible with system management bus (SMBus) standards. An ALERT output signals when the on-chip or remote temperature is out of range. The THERM output is a comparator output that allows on/off control of a cooling fan. The ALERT output can be reconfigured as a second THERM output, if required. The SMBus address of the ADT7461 is 0x4C. An ADT7461-2 is also available, which uses SMBus Address 0x4D. Features • On-Chip and Remote Temperature Sensor • 0.25°C Resolution/1°C Accuracy on Remote Channel • 1°C Resolution/3°C Accuracy on Local Channel • Automatically Cancels Up to 3 kW (Typ) of Resistance in Series with Remote Diode to Allow Noise Filtering • Extended, Switchable Temperature Measurement Range 0 °C to +127°C (Default) or –55°C to +150°C • Pin- and Register-Compatible with the ADM1032 • 2-wire SMBus Serial Interface with SMBus Alert Support • Two SMBus Address Versions Available: ♦ ADT7461 SMBus Address is 0x4C ♦ ADT7461-2 SMBus Address is 0x4D • Programmable Over/Undertemperature Limits • Offset Registers for System Calibration • Up to Two Overtemperature Fail−Safe THERM Outputs • Small 8-lead SOIC NB or 8-lead MSOP Packages • 170 mA Operating Current, 5.5 mA Standby Current • These are Pb-Free Devices* Applications • Desktop and Notebook Computers • Industrial Controllers • Smart Batteries • Embedded Systems • Instrumentation * For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. MARKING DIAGRAMS http://onsemi.com PIN ASSIGNMENT SOIC−8 NB CASE 751 ADT74 61A #YWW 1 8 ADT7461A = Specific Device Code # = Pb-Free Package Y = Year W = Work Week See detailed ordering and shipping information in the package dimensions section on page 18 of this data sheet. ORDERING INFORMATION T1x = Refer to Order Info Table A = Assembly Location Y = Year W = Work Week G = Pb-Free Package (Note: Microdot may be in either location) 1 8 T1x AYWG G MSOP8 CASE 846AB (Top View) SCLK SDATA ALERT/THERM2 GND D+ D− THERM VDD 8 7 6 5 1 2 3 4 SOIC−8 MSOP8 |
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