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AD7751AARS 데이터시트(PDF) 2 Page - Analog Devices

부품명 AD7751AARS
상세설명  Energy Metering IC With On-Chip Fault Detection
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
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REV. A
–2–
AD7751–SPECIFICATIONS1, 2
(AVDD = DVDD = 5 V
5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN =
3.58 MHz, TMIN to TMAX = –40 C to +85 C)
Parameter
A Version
B Version
Unit
Test Conditions/Comments
ACCURACY
3
Measurement Error
1 on Channels 1 and 2
One Channel with Full-Scale Signal (
±660 mV)
Gain = 1
0.1
0.1
% Reading typ
Over a Dynamic Range 500 to 1
Gain = 2
0.1
0.1
% Reading typ
Over a Dynamic Range 500 to 1
Gain = 8
0.1
0.1
% Reading typ
Over a Dynamic Range 500 to 1
Gain = 16
0.1
0.1
% Reading typ
Over a Dynamic Range 500 to 1
Phase Error
1 Between Channels
Line Frequency = 45 Hz to 55 Hz
V1 Phase Lead 37
°
(PF = 0.8 Capacitive)
±0.1
±0.1
Degrees(
°) max AC/DC = 0 and AC/DC = 1
V1 Phase Lag 60
°
(PF = 0.5 Inductive)
±0.1
±0.1
Degrees(
°) max AC/DC = 0 and AC/DC = 1
AC Power Supply Rejection
1
AC/
DC = 1, S0 = S1 = 1, G0 = G1 = 0
Output Frequency Variation (CF)
0.2
0.2
% Reading typ
V1 = 100 mV rms, V2 = 100 mV rms @ 50 Hz
Ripple on AVDD of 200 mV rms @ 100 Hz
DC Power Supply Rejection
1
AC/
DC = 1, S0 = S1 = 1, G0 = G1 = 0
Output Frequency Variation (CF)
±0.3
±0.3
% Reading typ
V1 = 100 mV rms, V2 = 100 mV rms,
AVDD = DVDD = 5 V
± 250 mV
FAULT DETECTION
1, 4
See Fault Detection Section
Fault Detection Threshold
Inactive i/p <> Active i/p
12.5
12.5
% typ
(V1A or V1B Active)
Input Swap Threshold
Inactive i/p > Active i/p
14
14
% of Active typ
(V1A or V1B Active)
Accuracy Fault Mode Operation
V1A Active, V1B = AGND
0.1
0.1
% Reading typ
Over a Dynamic Range 500 to 1
V1B Active, V1A = AGND
0.1
0.1
% Reading typ
Over a Dynamic Range 500 to 1
Fault Detection Delay
3
3
Second typ
Swap Delay
3
3
Second typ
ANALOG INPUTS
See Analog Inputs Section
Maximum Signal Levels
± 1
± 1
V max
V1A, V1B, V1N, V2N and V2P to AGND
Input Impedance (DC)
390
390
k
Ω min
CLKIN = 3.58 MHz
Bandwidth
14
14
kHz typ
CLKIN/256, CLKIN = 3.58 MHz
ADC Offset Error
1
±20
±20
mV max
See Terminology and Performance Graphs
Gain Error
1
± 4
± 4
% Ideal typ
External 2.5 V Reference, Gain = 1,
V1 = V2 = 660 mV dc
Gain Error Match
1
±0.2
±0.2
% Ideal typ
External 2.5 V Reference
REFERENCE INPUT
REFIN/OUT Input Voltage Range
2.7
2.7
V max
2.5 V + 8%
2.3
2.3
V min
2.5 V – 8%
Input Impedance
3.2
3.2
k
Ω min
Input Capacitance
10
10
pF max
ON-CHIP REFERENCE
Nominal 2.5 V
Reference Error
±200
±200
mV max
Temperature Coefficient
±30
±30
ppm/
°C typ
±60
ppm/
°C max
CLKIN
Note All Specifications for CLKIN of 3.58 MHz
Input Clock Frequency
4
4
MHz max
1
1
MHz min
LOGIC INPUTS
5
SCF, S0, S1, AC/
DC,
RESET, G0 and G1
Input High Voltage, VINH
2.4
2.4
V min
DVDD = 5 V
± 5%
Input Low Voltage, VINL
0.8
0.8
V max
DVDD = 5 V
± 5%
Input Current, IIN
± 3
± 3
µA max
Typically 10 nA, VIN = 0 V to DVDD
Input Capacitance, CIN
10
10
pF max


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