Datasheet AD71056 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Energy Metering IC with Integrated Oscillator and Reverse Polarity Indication |
| Pages / Page | 20 / 3 — AD71056. SPECIFICATIONS. Table 1. Parameter Value. Unit. Test. … |
| Revision | A |
| File Format / Size | PDF / 416 Kb |
| Document Language | English |
AD71056. SPECIFICATIONS. Table 1. Parameter Value. Unit. Test. Conditions/Comments
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AD71056 SPECIFICATIONS
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.
Table 1. Parameter Value Unit Test Conditions/Comments
ACCURACY1, 2 Measurement Error1 on Channel V1 0.1 % reading typ Channel V2 with full-scale signal (±165 mV), 25°C over a dynamic range 500 to 1, line frequency = 45 Hz to 65 Hz Phase Error1 Between Channels V1 Phase Lead 37° ±0.1 degrees max Power factor (PF) = 0.8 capacitive V1 Phase Lag 60° ±0.1 degrees max PF = 0.5 inductive AC Power Supply Rejection1 Output Frequency Variation (CF) 0.2 % reading typ S0 = S1 = 1, V1 = 21.2 mV rms, V2 = 116.7 mV rms @ 50 Hz, ripple on VDD of 200 mV rms @ 100 Hz DC Power Supply Rejection1 Output Frequency Variation (CF) ±0.3 % reading typ S0 = S1 = 1, V1 = 21.2 mV rms, V2 = 116.7 mV rms, VDD = 5 V ± 250 mV ANALOG INPUTS3 Channel V1 Maximum Signal Level ±30 mV max V1P and V1N to AGND Channel V2 Maximum Signal Level ±165 mV max V2P and V2N to AGND Input Impedance (DC) 320 kΩ min OSC = 450 kHz, RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C Bandwidth (–3 dB) 7 kHz nominal OSC = 450 kHz, RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C ADC Offset Error1, 2 ±18 mV max Gain Error1 ±4 % ideal typ External 2.5 V reference, V1 = 21.2 mV rms, V2 = 116.7 mV rms OSCILLATOR FREQUENCY (OSC) 450 kHz nominal RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C Oscillator Frequency Tolerance1 ±12 % reading typ Oscillator Frequency Stability1 ±30 ppm/°C typ REFERENCE INPUT REFIN/OUT Input Voltage Range 2.65 V max 2.45 V nominal 2.25 V min 2.45 V nominal Input Capacitance 10 pF max ON-CHIP REFERENCE 2.45 V nominal Reference Error ±200 mV max Temperature Coefficient ±20 ppm/°C typ LOGIC INPUTS4 SCF, S0, S1 Input High Voltage, VINH 2.4 V min VDD = 5 V ± 5% Input Low Voltage, VINL 0.8 V max VDD = 5 V ± 5% Input Current, IIN ±1 μA max Typically 10 nA, VIN = 0 V to VDD Input Capacitance, CIN 10 pF max LOGIC OUTPUTS4 F1 and F2 Output High Voltage, VOH 4.5 V min ISOURCE = 10 mA, VDD = 5 V, ISINK = 10 mA, VDD = 5 V Output Low Voltage, VOL 0.5 V max CF Output High Voltage, VOH 4 V min ISOURCE = 5 mA, VDD = 5 V, ISINK = 5 mA, VDD = 5 V Output Low Voltage, VOL 0.5 V max Frequency Output Error1, 2(CF) ±10 % ideal typ External 2.5 V reference, V1 = 21.2 mV rms, V2 = 116.7 mV rms Rev. A | Page 3 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 SPECIFICATIONS
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.
Table 1. Parameter Value Unit Test Conditions/Comments
ACCURACY1, 2 Measurement Error1 on Channel V1 0.1 % reading typ Channel V2 with full-scale signal (±165 mV), 25°C over a dynamic range 500 to 1, line frequency = 45 Hz to 65 Hz Phase Error1 Between Channels V1 Phase Lead 37° ±0.1 degrees max Power factor (PF) = 0.8 capacitive V1 Phase Lag 60° ±0.1 degrees max PF = 0.5 inductive AC Power Supply Rejection1 Output Frequency Variation (CF) 0.2 % reading typ S0 = S1 = 1, V1 = 21.2 mV rms, V2 = 116.7 mV rms @ 50 Hz, ripple on VDD of 200 mV rms @ 100 Hz DC Power Supply Rejection1 Output Frequency Variation (CF) ±0.3 % reading typ S0 = S1 = 1, V1 = 21.2 mV rms, V2 = 116.7 mV rms, VDD = 5 V ± 250 mV ANALOG INPUTS3 Channel V1 Maximum Signal Level ±30 mV max V1P and V1N to AGND Channel V2 Maximum Signal Level ±165 mV max V2P and V2N to AGND Input Impedance (DC) 320 kΩ min OSC = 450 kHz, RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C Bandwidth (–3 dB) 7 kHz nominal OSC = 450 kHz, RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C ADC Offset Error1, 2 ±18 mV max Gain Error1 ±4 % ideal typ External 2.5 V reference, V1 = 21.2 mV rms, V2 = 116.7 mV rms OSCILLATOR FREQUENCY (OSC) 450 kHz nominal RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C Oscillator Frequency Tolerance1 ±12 % reading typ Oscillator Frequency Stability1 ±30 ppm/°C typ REFERENCE INPUT REFIN/OUT Input Voltage Range 2.65 V max 2.45 V nominal 2.25 V min 2.45 V nominal Input Capacitance 10 pF max ON-CHIP REFERENCE 2.45 V nominal Reference Error ±200 mV max Temperature Coefficient ±20 ppm/°C typ LOGIC INPUTS4 SCF, S0, S1 Input High Voltage, VINH 2.4 V min VDD = 5 V ± 5% Input Low Voltage, VINL 0.8 V max VDD = 5 V ± 5% Input Current, IIN ±1 μA max Typically 10 nA, VIN = 0 V to VDD Input Capacitance, CIN 10 pF max LOGIC OUTPUTS4 F1 and F2 Output High Voltage, VOH 4.5 V min ISOURCE = 10 mA, VDD = 5 V, ISINK = 10 mA, VDD = 5 V Output Low Voltage, VOL 0.5 V max CF Output High Voltage, VOH 4 V min ISOURCE = 5 mA, VDD = 5 V, ISINK = 5 mA, VDD = 5 V Output Low Voltage, VOL 0.5 V max Frequency Output Error1, 2(CF) ±10 % ideal typ External 2.5 V reference, V1 = 21.2 mV rms, V2 = 116.7 mV rms Rev. A | Page 3 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
