Datasheet AD71056 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication |
| Pages / Page | 20 / 4 — AD71056. Parameter Value. Unit. Test. Conditions/Comments. TIMING … |
| Revision | A |
| File Format / Size | PDF / 416 Kb |
| Document Language | English |
AD71056. Parameter Value. Unit. Test. Conditions/Comments. TIMING CHARACTERISTICS. Table 2. Parameter. Specifications
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AD71056 Parameter Value Unit Test Conditions/Comments
POWER SUPPLY For specified performance VDD 4.75 V min 5 V − 5% 5.25 V max 5 V + 5% IDD 5 mA max Typically 4 mA 1 See the Terminology section for an explanation of specifications. 2 See plots in the Typical Performance Characteristics section. 3 See the Analog Inputs section. 4 Sample tested during initial release and after any redesign or process change that may affect this parameter.
TIMING CHARACTERISTICS
VDD = 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C, TMIN to TMAX = −40°C to +85°C, unless otherwise noted. Sample tested during initial release and after any redesign or process change that may affect this parameter. See Figure 2.
Table 2. Parameter Specifications Unit Test Conditions/Comments
t 1 1 120 ms F1 and F2 pulse width (logic low). t2 See Table 6 sec Output pulse period. See the Transfer Function section. t3 1/2 t2 sec Time between F1 falling edge and F2 falling edge. t 1, 2 4 90 ms CF pulse width (logic high). t5 See Table 7 sec CF pulse period. See the Transfer Function section. t6 2 μs Minimum time between F1 and F2 pulses. 1 The pulse widths of F1, F2, and CF are not fixed for higher output frequencies. See the Frequency Outputs section. 2 The CF pulse is always 35 μs in high frequency mode. See the Frequency Outputs section and Table 7.
Timing Diagram t1 F1 t6 t2 F2 t3 t4 t5
2 00
CF
6- 63 05 Figure 2. Timing Diagram for Frequency Outputs Rev. A | Page 4 of 20 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Timing Diagram ABSOLUTE MAXIMUM RATINGS ESD CAUTION TERMINOLOGY PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER FACTOR CONSIDERATIONS NONSINUSOIDAL VOLTAGE AND CURRENT APPLICATIONS ANALOG INPUTS Channel V1 (Current Channel) Channel V2 (Voltage Channel) Typical Connection Diagrams POWER SUPPLY MONITOR HPF and Offset Effects Digital-to-Frequency Conversion Connecting to a Microcontroller for Energy Measurement Power Measurement Considerations INTERNAL OSCILLATOR (OSC) 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
AD71056 Parameter Value Unit Test Conditions/Comments
POWER SUPPLY For specified performance VDD 4.75 V min 5 V − 5% 5.25 V max 5 V + 5% IDD 5 mA max Typically 4 mA 1 See the Terminology section for an explanation of specifications. 2 See plots in the Typical Performance Characteristics section. 3 See the Analog Inputs section. 4 Sample tested during initial release and after any redesign or process change that may affect this parameter.
TIMING CHARACTERISTICS
VDD = 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C, TMIN to TMAX = −40°C to +85°C, unless otherwise noted. Sample tested during initial release and after any redesign or process change that may affect this parameter. See Figure 2.
Table 2. Parameter Specifications Unit Test Conditions/Comments
t 1 1 120 ms F1 and F2 pulse width (logic low). t2 See Table 6 sec Output pulse period. See the Transfer Function section. t3 1/2 t2 sec Time between F1 falling edge and F2 falling edge. t 1, 2 4 90 ms CF pulse width (logic high). t5 See Table 7 sec CF pulse period. See the Transfer Function section. t6 2 μs Minimum time between F1 and F2 pulses. 1 The pulse widths of F1, F2, and CF are not fixed for higher output frequencies. See the Frequency Outputs section. 2 The CF pulse is always 35 μs in high frequency mode. See the Frequency Outputs section and Table 7.
Timing Diagram t1 F1 t6 t2 F2 t3 t4 t5
2 00
CF
6- 63 05 Figure 2. Timing Diagram for Frequency Outputs Rev. A | Page 4 of 20 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Timing Diagram ABSOLUTE MAXIMUM RATINGS ESD CAUTION TERMINOLOGY PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER FACTOR CONSIDERATIONS NONSINUSOIDAL VOLTAGE AND CURRENT APPLICATIONS ANALOG INPUTS Channel V1 (Current Channel) Channel V2 (Voltage Channel) Typical Connection Diagrams POWER SUPPLY MONITOR HPF and Offset Effects Digital-to-Frequency Conversion Connecting to a Microcontroller for Energy Measurement Power Measurement Considerations INTERNAL OSCILLATOR (OSC) 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
