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ADT7421ARMZ-RL7 Datasheet(PDF) 4 Page - ON Semiconductor |
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ADT7421ARMZ-RL7 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 20 page ADT7421 http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (TA = −40°C to +125°C, VDD = 3.0 V to 3.6 V, unless otherwise noted) Parameter Conditions Min Typ Max Unit Power Supply Supply Voltage, VDD 3.0 3.30 3.6 V Average Operating Supply Current, IDD 0.0625 Conversions/Sec Rate (Note 1) 3.0 4.0 mA Standby Mode Supply Current −40°C ≤ TA ≤ +85°C −40°C ≤ TA ≤ +125°C 10 20 mA Power-On-Reset Threshold 1.0 2.8 V Temperature−To−Digital Converter Local Sensor Accuracy 0°C ≤ TA ≤ +125°C ±2.75 °C Resolution 1.0 °C Remote Transistor Sensor Accuracy +40°C ≤ TA ≤ +85°C, +60°C ≤ TD ≤ +110°C (Note 2) +25°C ≤ TA ≤ +85°C, +60°C ≤ TD ≤ +110°C (Note 2) TA = +40°C, +60°C ≤ TD ≤ +110°C (Note 2) ±2.5 ±3.25 ±1.75 °C Resolution 0.25 °C Remote Sensor Source Current The range of source currents provided to the external thermal transistor for temperature measurements. 10 to 360 mA Conversion Time From stop bit to conversion complete, one-shot mode with averaging switched on. One-shot mode with averaging off. 184 20 ms Maximum Series Resistance Cancelled Resistance split evenly on both the D+ and D– inputs. 50 W Open−Drain Digital Outputs (THERM, ALERT/THERM2, SDA) Output Low Voltage, VOL IOUT = −6.0 mA 0.2 V High Level Output Leakage Current, IOH VOUT = VDD 0.1 1.0 mA SMBus Interface (Note 3) Logic Input High Voltage, VIH SCL, SDA 3.0 V ≤ VDD ≤ 3.6 V 2.1 V Logic Input Low Voltage, VIL SCL, SDA 3.0 V ≤ VDD ≤ 3.6 V 0.8 V Hysteresis 500 mV SDA Output Low Voltage, VOL IOUT = −6.0 mA 0.4 V Logic Input Current, IIH, IIL −1.0 +1.0 mA SMBus Input Capacitance, SCLK, SDATA 10 pF SMBus Clock Frequency 400 kHz SMBus Timeout (Note 4) User programmable 25 300 ms SCLK Falling Edge to SDATA Valid Time Master clocking in data 1.0 ms 1. See Table 4 for information on other conversion rates. 2. Guaranteed by characterization, but not production tested. 3. See SMBus Timing Specifications section for more information. 4. Disabled by default. Detailed procedures to enable it are in the Serial Bus Interface section of this datasheet. |
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