Datasheet AD7414, AD7415 (Analog Devices) - 4

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AD7414/ AD7415 Data Sheet Parameter A Version Unit Test Conditions/Comments
AC ELECTRICAL CHARACTERISTICS8, 9 Serial Clock Period, t1 2.5 μs min See Figure 2 Data In Setup Time to SCL High, t2 50 ns min See Figure 2 Data Out Stable after SCL Low, t3 0 ns min See Figure 2 SDA Low Setup Time to SCL Low 50 ns min See Figure 2 (Start Condition), t4 SDA High Hold Time after SCL High 50 ns min See Figure 2 (Stop Condition), t5 SDA and SCL Fall Time, t6 90 ns max See Figure 2 Data Hold Time, t7 35 ns min See Figure 2 Power-Up Time 4 μs typ 1 Accuracy specifications apply only to voltages listed under Test Conditions. See Temperature Accuracy vs. Supply section for typical accuracy performance over the full VDD supply range. 2 100% production tested at 40°C to these limits. 3 These current values can be used to determine average power consumption at different one-shot conversion rates. Average power consumption at the automatic conversion rate of 1.25 kHz is 940 μW. 4 This peak supply current is required for 29 μs (the conversion time plus power-up time) out of every 800 μs (the conversion rate). 5 These current values are derived by not issuing a stop condition at the end of a write or read, thus preventing the part from going into a conversion. 6 The current is derived assuming a 400 kHz serial clock being active continuously. 7 On power-up, the initial input current, IIN, on the AS pin is typically 50 μA. 8 The SDA and SCL timing is measured with the input filters turned on so as to meet the fast mode I2C specification. Switching off the input filters improves the transfer rate but has a negative effect on the EMC behavior of the part. 9 Guaranteed by design. Not tested in production.
t1 SCL t t t 4 2 7 t5 SDA DATA IN t3 SDA DATA OUT
02 0 3-
t6
46 02 Figure 2. Diagram for Serial Bus Timing Rev. G | Page 4 of 19 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS THEORY OF OPERATION CIRCUIT INFORMATION FUNCTIONAL DESCRIPTION MEASUREMENT TECHNIQUE TEMPERATURE DATA FORMAT INTERNAL REGISTER STRUCTURE ADDRESS POINTER REGISTER CONFIGURATION REGISTER (ADDRESS 0x01) TEMPERATURE VALUE REGISTER (ADDRESS 0x00) AD7414 THIGH REGISTER (ADDRESS 0X02) AD7414 TLOW REGISTER (ADDRESS 0x03) SERIAL INTERFACE SERIAL BUS ADDRESS WRITE MODE Writing to the Address Pointer Register for a Subsequent Read Writing a Single Byte of Data to the Configuration Register, THIGH Register, or TLOW Register READ MODE SMBUS ALERT POWER-ON DEFAULTS OPERATING MODES Mode 1 Mode 2 POWER VS. THROUGHPUT Mode 1 Mode 2 MOUNTING THE AD7414/AD7415 SUPPLY DECOUPLING TEMPERATURE ACCURACY VS. SUPPLY TYPICAL TEMPERATURE ERROR GRAPH OUTLINE DIMENSIONS ORDERING GUIDE