Datasheet ADE7755 (Analog Devices) - 4

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ADE7755 Data Sheet Parameter Min Typ Max Unit Test Conditions/Comments
POWER SUPPLY For specified performance AVDD 4.75 V 5 V − 5% 5.25 V 5 V + 5% DVDD 4.75 V 5 V − 5% 5.25 V 5 V + 5% AIDD 3 mA Typically 2 mA DIDD 2.5 mA Typically 1.5 mA 1 See the Terminology section. 2 See the Typical Performance Characteristics section for the plots. 3 Sample tested during initial release and after any redesign or process change that may affect this parameter.
TIMING CHARACTERISTICS
AVDD = DVDD = 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, CLKIN = 3.58 MHz, TMIN to TMAX = −40°C to +85°C.
Table 2. Parameter1, 2 Specification Unit Test Conditions/Comments
t 3 1 275 ms F1 and F2 pulse width (logic low) t2 See Table 7 sec Output pulse period; see the Transfer Function section t3 1/2 t2 sec Time between F1 falling edge and F2 falling edge t 3, 4 4 90 ms CF pulse width (logic high) t5 See Table 8 sec CF pulse period; see the Transfer Function section t6 CLKIN/4 sec Minimum time between F1 and F2 pulse 1 Sample tested during initial release and after any redesign or process change that may affect this parameter. 2 See Figure 2. 3 The pulse widths of F1, F2, and CF are not fixed for higher output frequencies. See the Frequency Outputs section. 4 The CF pulse is always 18 µs in the high frequency mode. See the Frequency Outputs section and Table 8.
t1 F1 t6 t2 F2 t3 t t 4 5
002
CF
02896- Figure 2. Timing Diagram for Frequency Outputs Rev. B | Page 4 of 20 Document Outline Features General Description Functional Block Diagram Revision History Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Power Factor Considerations Nonsinusoidal Voltage and Current Analog Inputs Channel 1 (Current Channel) Channel 2 (Voltage Channel) Typical Connection Diagrams Power Supply Monitor HPF and Offset Effects Digital-to-Frequency Conversion Interfacing the ADE7755 to a Microcontroller for Energy Measurement Power Measurement Considerations Transfer Function Frequency Outputs F1 and F2 Example 1 Example 2 Frequency Output CF Selecting a Frequency for an Energy Meter Application Frequency Outputs No Load Threshold Outline Dimensions Ordering Guide