Datasheet ADE7752, ADE7752A (Analog Devices) - 4

link to page 4 link to page 4 link to page 4 link to page 20 link to page 21 link to page 4 link to page 4 link to page 4 link to page 20 link to page 22 link to page 21
ADE7752/ADE7752A TIMING CHARACTERISTICS
V 1, 2 DD = 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, CLKIN = 10 MHz, TMIN to TMAX = –40°C to +85°C, unless otherwise noted .
Table 2. Parameter Conditions Spec Unit
t 3 1 F1 and F2 Pulse Width (Logic High). 275 ms t2 Output Pulse Period. See the Transfer Function section. See Table 6. sec t3 Time between F1 Falling Edge and F2 Falling Edge. 1/2 t2 sec t 3, 4 4 CF Pulse Width (Logic High). 96 ms t 5 5 CF Pulse Period. See the Transfer Function and the Frequency Outputs sections. See Table 7. sec t6 Minimum Time Between the F1 and F2 Pulse. CLKIN/4 sec 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 CF is not synchronous to F1 or F2 frequency outputs. 5 The CF pulse is always 1 μs in the high frequency mode.
t1 F1 t6 t2 t F2 3 t t 4 5
2 -00 A
CF
6- 267 0 Figure 2. Timing Diagram for Frequency Outputs Rev. C | Page 4 of 24 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUIT TERMINOLOGY THEORY OF OPERATION POWER FACTOR CONSIDERATIONS NONSINUSOIDAL VOLTAGE AND CURRENT ANALOG INPUTS CURRENT CHANNELS VOLTAGE CHANNELS TYPICAL CONNECTION DIAGRAMS CURRENT CHANNEL CONNECTION VOLTAGE CHANNELS CONNECTION METER CONNECTIONS POWER SUPPLY MONITOR HPF AND OFFSET EFFECTS DIGITAL-TO-FREQUENCY CONVERSION MODE SELECTION OF THE SUM OF THE THREE ACTIVE ENERGIES POWER MEASUREMENT CONSIDERATIONS TRANSFER FUNCTION FREQUENCY OUTPUTS F1 AND F2 FREQUENCY OUTPUT CF SELECTING A FREQUENCY FOR AN ENERGY METER APPLICATION FREQUENCY OUTPUTS NO LOAD THRESHOLD NEGATIVE POWER INFORMATION OUTLINE DIMENSIONS ORDERING GUIDE