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ADE7761ARS

Energy Metering IC with On-Chip Fault and Missing Neutral Detection

Analog Devices 

ADE7761

SPECIFICATIONS

VDD = 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, on-chip oscillator, TMIN to TMAX = –40°C to +85°C.

Table 1.

Parameter

Value Unit

Test Conditions/Comments

ACCURACY1

Measurement Error2

0.1

% of reading, typ Over a dynamic range of 500 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 Rejection2

Output Frequency Variation

DC Power Supply Rejection2

Output Frequency Variation

FAULT DETECTION2, 3

Fault Detection Threshold

E Inactive Input <> Active Input

Input Swap Threshold

Inactive Input <> Active Input

T Accuracy Fault Mode Operation

V1A Active, V1B = AGND

V1B Active, V1A = AGND

Fault Detection Delay

E Swap Delay

MISSING NEUTRAL MODE2, 4

Missing Neutral Detection Threshold

L V2P − V2N

Accuracy Missing Neutral Mode

V1A Active, V1B = V2P = AGND

V1B Active, V1A = V2P = AGND

O Missing Neutral Detection Delay

ANALOG INPUTS

Maximum Signal Levels

S Input Impedance (DC)

Bandwidth (−3 dB)

ADC Offset Error2

B Gain Error

REFERENCE INPUT

O REFIN/OUT Input Voltage Range

0.01

0.01

6.25

6.25

0.1

0.1

3

3

59.4

0.1

0.1

3

±660

660

400

7

10

±4

2.7

2.3

%, typ

%, typ

%, typ

% of larger, typ

% of reading, typ

% of reading, typ

Seconds, typ

Seconds, typ

mV peak, min

% of reading, typ

% of reading, typ

Seconds, typ

mV peak, max

mV peak, max

kΩ, min

kHz, typ

mV, max

%, typ

V, max

V, min

V1A = V1B = V2P = ±100 mV rms

V1A = V1B = V2P = ±100 mV rms

See the Fault Detection section

(V1A or V1B active)

(V1A or V1B active)

Over a dynamic range of 500 to 1

Over a dynamic range of 500 to 1

See the Missing Neutral Detection section

Over a dynamic range of 500 to 1

Over a dynamic range of 500 to 1

V1A − V1N, V1B − V1N, V2P − V2N

Differential input

Differential input MISCAL − V2N

Uncalibrated error, see the Terminology section for details

External 2.5 V reference

2.5 V + 8%

2.5 V − 8%

Input Impedance

4

kΩ, min

Input Capacitance

10

pF, max

ON-CHIP REFERENCE

Reference Error

±200 mV, max

Temperature Coefficient

30

ppm/°C, typ

Current Source

20

µA, min

ON-CHIP OSCILLATOR

Oscillator Frequency

450

kHz

Oscillator Frequency Tolerance

±12

% of reading, typ

Temperature Coefficient

30

ppm/°C, typ

See footnotes on next page.

Rev. A | Page 4 of 28

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