Datasheet

REV. A–2–
ADE7757–SPECIFICATIONS
(V
DD
= 5 V  5%, AGND = DGND = 0 V, On-Chip Reference, RCLKIN = 6.2 k,
0.5%  50 ppm/C, T
MIN
to T
MAX
= –40C to +85C, unless otherwise noted.)
Parameter Value Unit Test Conditions/Comments
ACCURACY
1, 2
Measurement Error
1
on Channel V1 Channel V2 with Full-Scale Signal (± 165 mV), 25°C
0.1 % Reading typ Over a Dynamic Range 500 to 1
Phase Error
1
between Channels Line Frequency = 45 Hz to 65 Hz
V1 Phase Lead 37°
(PF = 0.8 Capacitive) ± 0.1 Degrees (°) max
V1 Phase Lag 60°
(PF = 0.5 Inductive) ± 0.1 Degrees (°) max
AC Power Supply Rejection
1
S0 = S1 = 1,
Output Frequency Variation (CF) 0.2 % Reading typ V1 = 21.2 mV rms, V2 = 116.7 mV rms @ 50 Hz
Ripple on V
DD
of 200 mV rms @ 100 Hz
DC Power Supply Rejection
1
S0 = S1 = 1,
Output Frequency Variation (CF) ± 0.3 % Reading typ V1 = 21.2 mV rms, V2 = 116.7 mV rms,
V
DD
= 5 V ± 250 mV
ANALOG INPUTS See Analog Inputs section
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% ± 5
0 ppm/°C
Bandwidth (–3 dB) 7 kHz nominal OSC = 450 kHz, RCLKIN = 6.2 kΩ, 0.5% ± 50 ppm/°C
ADC Offset Error
1, 2
± 18 mV max See Terminology Section and Typical Performance Characteristics
Gain Error
1
± 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 Tolerance
1
± 12 % Reading typ
Oscillator Frequency Stability
1
± 30 ppm/°C typ
REFERENCE INPUT
REF
IN/OUT
Input Voltage Range 2.7 V max 2.5 V + 8%
2.3 V min 2.5 V – 8%
Input Capacitance 10 pF max
ON-CHIP REFERENCE Nominal 2.5 V
Reference Error ± 200 mV max
Temperature Coefficient ± 20 ppm/°C typ
LOGIC INPUTS
3
SCF, S0, S1,
Input High Voltage, V
INH
2.4 V min V
DD
= 5 V ± 5%
Input Low Voltage, V
INL
0.8 V max V
DD
= 5 V ± 5%
Input Current, I
IN
± 1 µA max Typically 10 nA, V
IN
= 0 V to V
DD
Input Capacitance, C
IN
10 pF max
LOGIC OUTPUTS
3
F1 and F2
Output High Voltage, V
OH
I
SOURCE
= 10 mA
4.5 V min V
DD
= 5 V
Output Low Voltage, V
OL
I
SINK
= 10 mA
0.5 V max V
DD
= 5 V
CF
Output High Voltage, V
OH
I
SOURCE
= 5 mA
4V min V
DD
= 5 V
Output Low Voltage, VOL I
SINK
= 5 mA
0.5 V max V
DD
= 5 V
Frequency Output Error
1, 2
(CF) ± 10 % Ideal typ External 2.5 V Reference,
V1 = 21.2 mV rms, V2 = 116.7 mV rms
POWER SUPPLY For Specified Performance
V
DD
4.75 V min 5 V – 5%
5.25 V max 5 V + 5%
I
DD
5 mA max Typically 4 mA
NOTES
1
See Terminology section for explanation of specifications.
2
See plots in Typical Performance Characteristics.
3
Sample tested during initial release and after any redesign or process change that may affect this parameter.
Specifications subject to change without notice.