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ADT7490 Datasheet(PDF) 4 Page - ON Semiconductor |
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ADT7490 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 75 page ADT7490 http://onsemi.com 4 ELECTRICAL CHARACTERISTICS TA = TMIN to TMAX, VCC = VMIN to VMAX, unless otherwise noted. (Note 1) Parameter Conditions Min Typ Max Unit Power Supply Supply Voltage 3.0 3.3 3.6 V Supply Current, ICC Interface inactive, ADC active 1.5 5.0 mA Temperature−to−Digital Converter Local Sensor Accuracy Resolution 0°C ≤ TA ≤ 85°C −40°C ≤ TA ≤ +125°C ±0.5 0.25 ±1.5 ±2.5 °C Remote Diode Sensor Accuracy 0°C ≤ TA ≤ 85°C −40°C ≤ TA ≤ +125°C ±0.5 0.25 ±1.5 ±2.5 °C Remote Sensor Source Current Mid level Low level High level 12 72 192 mA Series Resistance Cancellation (Note 2) The ADT7490 cancels up to 2 kW in series with the remote thermal sensor 1.5 kW Analog−to−Digital Converter (Including MUX and Attentuators) Total Unadjusted Error (TUE) For all channels: −40°C ≤ TA ≤ +125°C For all other channels except +12 VIN: 0°C ≤ TA ≤ +125°C ±2 ±1.5 % Differential Non−linearity (DNL) 8 bits ±1 LSB Power Supply Sensitivity ±0.1 %/V Conversion Times (Note 2) Voltage Inputs VTT Voltage Input (Note 3) Local Temperature Remote Temperature Averaging enabled, all channels excluding VTT (Note ) Averaging enabled Averaging enabled Averaging enabled Averaging enabled 11 12 12 38 13 14 14 43 ms Total Monitoring Cycle Time Averaging disabled 169 19 193 ms Input Resistance For +12 VIN channel For all other channels 150 70 200 100 kW Fan RPM−to−Digital Converter Accuracy 0°C ≤ TA ≤ 85°C −40°C ≤ TA ≤ +125°C ±10 ±14 % Full−Scale Count 65,535 Nominal Input RPM Fan count = 0xBFFF Fan count = 0x3FFF Fan count = 0x0438 Fan count = 0x021C 109 329 5000 10,000 RPM Open−Drain Digital Outputs, PWM1 TO PWM3, XTO Current Sink, IOL 8.0 mA Output Low Voltage, VOL IOUT = −8.0 mA 0.4 V High Level Output Current, IOH VOUT = VCC 0.1 20 mA Open−Drain Serial Data Bus Output (SDA) Output Low Voltage, VOL IOUT = −4.0 mA 0.4 V High Level Output Current, IOH VOUT = VCC 0.1 1.0 mA SMBus Digital Inputs (SCL, SDA) Input High Voltage, VIH 2.0 V Input Low Voltage, VIL 0.8 V Hysteresis 500 mV |
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