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ADE7761BARSZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
ADE7761B
Rev. 0 | Page 3 of 24
SPECIFICATIONS
V
DD
= 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, on-chip oscillator, T
MIN
to T
MAX
= −40°C to +85°C.
Table 1.
Parameter Value Unit Test Conditions/Comments
ACCURACY
1
Measurement Error
2
0.1 % of reading, typ Over a dynamic range of 1000 to 1
Phase Error Between Channels
PF = 0.8 Capacitive ±0.05 Degrees, max Phase lead 37°
PF = 0.5 Inductive ±0.05 Degrees, max Phase lag 60°
AC Power Supply Rejection
2
Output Frequency Variation 0.01 %, typ V
1A
= V
1B
= V
2P
= ±100 mV rms
DC Power Supply Rejection
2
Output Frequency Variation 0.01 %, typ V
1A
= V
1B
= V
2P
= ±100 mV rms
FAULT DETECTION
2, 3
See the Fault Detection section
Fault Detection Threshold
Inactive Input ≠ Active Input 6.25 %, typ V
1A
or V
1B
active
Input Swap Threshold
Inactive Input ≠ Active Input 6.25 % of larger, typ V
1A
or V
1B
active
Accuracy Fault Mode Operation
V
1A
Active, V
1B
= AGND 0.1 % of reading, typ Over a dynamic range of 1000 to 1
V
1B
Active, V
1A
= AGND 0.1 % of reading, typ Over a dynamic range of 1000 to 1
Fault Detection Delay 3 Seconds, typ
Swap Delay 3 Seconds, typ
MISSING NEUTRAL MODE
2, 4
See the Missing Neutral Detection section
Missing Neutral Detection Threshold
V
2P
− V
2N
59.4 mV peak, min
Accuracy Missing Neutral Mode
V
1A
Active, V
1B
= V
2P
= AGND 0.1 % of reading, typ Over a dynamic range of 500 to 1
V
1B
Active, V
1A
= V
2P
= AGND 0.1 % of reading, typ Over a dynamic range of 500 to 1
Missing Neutral Detection Delay 3 Seconds, typ
ANALOG INPUTS V
1A
− V
1N
, V
1B
− V
1N
, V
2P
− V
2N
Maximum Signal Levels ±660 mV peak, max Differential input
660 mV peak, max Differential input MISCAL − V
2N
Input Impedance (DC) 790 kΩ, min
Bandwidth (−3 dB) 7 kHz, typ
ADC Offset Error
2
15 mV, typ Uncalibrated error, see the Terminology section for details
Gain Error ±4 %, typ External 2.5 V reference
Gain Error Match
2
±3 %, typ External 2.5 V reference
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 Impedance 3 kΩ, min
Input Capacitance 10 pF, max
ON-CHIP REFERENCE
Reference Error ±200 mV, max
Temperature Coefficient 30 ppm/°C, typ
Current Source 10 µA, max Specification assures that V
REF
is within ±8%
ON-CHIP OSCILLATOR
Oscillator Frequency 450 kHz
Oscillator Frequency Tolerance ±12 % of reading, typ
Temperature Coefficient 30 ppm/°C, typ
Specification achieved with 25 ppm/°C max resistor on the
RCLKIN pin
ADE7761B
Rev. 0 | Page 4 of 24
Parameter Value Unit Test Conditions/Comments
LOGIC INPUTS
5
PGA, SCF, S1, and S0
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
±3 µA, max Typical 10 nA, V
IN
= 0 V to V
DD
Input Capacitance, C
IN
10 pF, max
LOGIC OUTPUTS
5
CF, REVP, and FAULT
Output High Voltage, V
OH
4 V, min V
DD
= 5 V ± 5%
Output Low Voltage, V
OH
1 V, max V
DD
= 5 V ± 5%
F1 and F2
Output High Voltage, V
OH
4 V, min V
DD
= 5 V ± 5%, I
SOURCE
= 10 mA
Output Low Voltage, V
OH
1 V, max V
DD
= 5 V ± 5%, I
SINK
= 10 mA
POWER SUPPLY For specified performance
V
DD
4.75 V, min 5 V − 5%
5.25 V, max 5 V + 5%
I
DD
3.65 mA, max
1
See plots in the Typical Performance Characteristics section.
2
See the Terminology section for explanation of specifications.
3
See the Fault Detection section for explanation of fault detection functionality.
4
See the Missing Neutral Detection section for explanation of missing neutral detection functionality.
5
Sample tested during initial release and after any redesign or process change that might affect this parameter.
TIMING CHARACTERISTICS
V
DD
= 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, on-chip oscillator, T
MIN
to T
MAX
= −40°C to +85°C. Sample tested during
initial release and after any redesign or process change that might affect this parameter. See
Figure 2.
Table 2.
Parameter Value Unit Test Conditions/Comments
t
1
1
120 ms F
1
and F
2
pulse width (logic high)
t
2
See Table 8 sec Output pulse period (see the Transfer Function section)
t
3
1/2 t
2
sec Time between F
1
falling edge and F
2
falling edge
t
4
1
90 ms CF pulse width (logic high)
t
5
See Table 8 sec CF pulse period (see the Transfer Function section)
t
6
CLKIN/4 sec Minimum time between F
1
pulse and F
2
pulse
1
The pulse widths of F1, F2, and CF are not fixed for higher output frequencies. See the Transfer Function section.
Timing Diagram
t
1
t
6
t
3
t
4
t
2
t
5
F1
F2
CF
06797-002
Figure 2. Timing Diagram for Frequency Outputs
ADE7761B
Rev. 0 | Page 5 of 24
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter Rating
V
DD
to AGND −0.3 V to +7 V
Analog Input Voltage to AGND
V
1A
, V
1B
, V
1N
, V
2N
, V
2P
, MISCAL
−6 V to +6 V
Reference Input Voltage to AGND −0.3 V to V
DD
+ 0.3 V
Digital Input Voltage to DGND −0.3 V to V
DD
+ 0.3 V
Digital Output Voltage to DGND −0.3 V to V
DD
+ 0.3 V
Operating Temperature Range
Industrial −40°C to +85°C
Storage Temperature Range −65°C to +150°C
Junction Temperature 150°C
20-Lead SSOP, Power Dissipation 450 mW
θ
JA
Thermal Impedance 112°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
PERFORMANCE ISSUES THAT MAY AFFECT
BILLING ACCURACY
The ADE7761B provides pulse outputs, CF, F1, and F2, that are
intended to be used for the billing of active energy. Pulses are
generated at these outputs in two different situations.
Case 1
When the analog input V
2P
− V
2N
complies with the conditions
described in
Figure 34, the CF, F
1
, and F
2
frequencies are
proportional to active power and can be used to bill active energy.
Case 2
When the analog input V
2P
− V
2N
does not comply with the
conditions described in
Figure 34, the ADE7761B does not
measure active energy but a quantity proportional to kiloampere-
hours (kAh). This quantity is used to generate pulses on the
same CF, F1, and F2. This situation is indicated when the
FAULT pin is high.
Analog Devices, Inc., cautions users of the ADE7761B about the
following:
• Billing active energy in Case 1 is consistent with the under-
standing of the quantity represented by pulses on the CF, F1,
and F2 outputs (watthour).
• Billing active energy while the ADE7761B is in Case 2 must
be decided knowing that the entity measured by the ADE7761B
in this case is ampere-hour and not watthour. Users should
be aware of this limitation and decide if the ADE7761B is
appropriate for their application.
ESD CAUTION
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

ADE7761BARSZ

Mfr. #:
Buy ADE7761BARSZ
Manufacturer:
Analog Devices Inc.
Description:
Data Acquisition ADCs/DACs - Specialized Energy Metering IC w/ On-Chip Fault
Lifecycle:
New from this manufacturer.
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