Datasheet AD7416, AD7417, AD7418 (Analog Devices) - 6

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AD7416/AD7417/AD7418 Data Sheet AD7416 SPECIFICATIONS
VDD = 2.7 V to 5.5 V, GND = 0 V, REFIN = 2.5 V, unless otherwise noted.
Table 2. Parameter Min Typ Max Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC Accuracy ±2.0 °C TA = −25°C to + 100°C (VDD = 3 V minimum)1 ±3.0 °C TA = −40°C to + 125°C (VDD = 3 V minimum)1 Resolution 10 Bits Temperature Conversion Time 40 μs Update Rate, tR 400 μs OTI Delay 1 × tR 6 × tR ms Depends on fault queue setting Supply Current 1.0 mA I2C active 350 600 μA I2C inactive 0.2 1.5 μA Shutdown mode TOTI Default Temperature 80 °C THYST Default Temperature 75 °C DIGITAL INPUTS Input High Voltage, VIH VDD × 0.7 VDD + 0.5 V Input Low Voltage, VIL −0.3 VDD × 0.3 V Input High Current, IIH +0.005 +1.0 μA VIN = 5 V Input Low Current, IIL −0.005 −1.0 μA VIN = 0 V Input Capacitance, CIN 20 pF All digital inputs DIGITAL OUTPUTS Output Low Voltage, VOL 0.4 V IOL = 3 mA Output High Current 1 μA VOH = 5 V Output Fall Time, tf 250 ns CL = 400 pF, IO = 3 mA OS Output Low Voltage, VOL 0.8 V IOUT = 4 mA AC ELECTRICAL CHARACTERISTICS2 AD7416/AD7417/AD7418 Serial Clock Period, t1 2.5 μs See Figure 4 Data In Setup Time to SCL High, t2 50 ns See Figure 4 Data Out Stable after SCL Low, t3 0 ns See Figure 4 SDA Low Setup Time to SCL Low (Start Condition), t4 50 ns See Figure 4 SDA High Hold Time after SCL High (Stop Condition), t5 50 ns See Figure 4 SDA and SCL Fall Time, t6 300 ns See Figure 4 1 For VDD = 2.7 V to 3 V, TA maximum = 85°C and temperature sensor measurement error = ±3°C maximum. 2 Sample tested during initial release and after any redesign or process change that may affect this parameter.
t1 SCL t4 t2 t5 SDA DATA IN t3 SDA DATA OUT
004
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1 0 Figure 4. Diagram for Serial Bus Timing Rev. J | Page 6 of 23 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS TABLE OF CONTENTS REVISION HISTORY PRODUCT HIGHLIGHTS SPECIFICATIONS AD7417/AD7418 SPECIFICATIONS AD7416 SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS ON-CHIP REFERENCE TEMPERATURE MEASUREMENT INTERNAL REGISTER STRUCTURE Address Pointer Register Temperature Value Register (Address 0x00) Configuration Register (Address 0x01) THYST Setpoint Register (Address 0x02) TOTI Setpoint Register (Address 0x03) ADC Value Register (Address 0x04) ADC Transfer Function Config2 Register (Address 0x05) SERIAL BUS INTERFACE Serial Bus Address Writing to the AD7416/AD7417/AD7418 Reading Data From the AD7416/AD7417/AD7418 OTI OUTPUT FAULT QUEUE POWER-ON DEFAULTS OPERATING MODES Mode 1 Mode 2 CONVSTB START MODE CONVSTB Pin Mode APPLICATIONS INFORMATION SUPPLY DECOUPLING POWER-ON RESET MOUNTING THE AD7416/AD7417/AD7418 FAN CONTROLLER THERMOSTAT SYSTEM WITH MULTIPLE AD7416 DEVICES OUTLINE DIMENSIONS ORDERING GUIDE