ADE7932 datasheet(7/120 Pages) AD

7 / 120 page

Data Sheet

ADE7978/ADE7933/ADE7932

Rev. 0 | Page 7 of 120

SPECIFICATIONS

SYSTEM SPECIFICATIONS, ADE7978 AND ADE7933/ADE7932

VDD = 3.3 V ± 10%, GND = DGND = 0 V, ADE7978 XTALIN = 16.384 MHz, TMIN to TMAX = −40°C to +85°C, TTYP = 25°C.

Table 1.

Parameter1, 2

Min

Typ

Max

Unit

Test Conditions/Comments

ACTIVE ENERGY MEASUREMENT

Measurement Error (per Phase)

Total Active Energy

0.1

Over a dynamic range of 500 to 1, power

factor (PF) = 1, gain compensation only

0.2

Over a dynamic range of 2000 to 1, PF = 1

Fundamental Active Power

0.1

Over a dynamic range of 500 to 1, PF = 1,

gain compensation only

0.2

Over a dynamic range of 2000 to 1, PF = 1

AC Power Supply Rejection

VDD = 3.3 V + 120 mV rms at 50 Hz/100 Hz,

IP = 6.25 mV rms, V1P = V2P = 100 mV rms

Output Frequency Variation

0.01

DC Power Supply Rejection

VDD = 3.3 V ± 330 mV dc, IP = 6.25 mV rms,

V1P = V2P = 100 mV rms

Output Frequency Variation

0.01

Total Active Energy Measurement

Bandwidth

3.3

kHz

REACTIVE ENERGY MEASUREMENT

Measurement Error (per Phase)

Total Reactive Power

0.1

Over a dynamic range of 500 to 1, PF = 0,

gain compensation only

0.2

Over a dynamic range of 2000 to 1, PF = 0

Fundamental Reactive Power

0.1

Over a dynamic range of 500 to 1, PF = 0,

gain compensation only

0.2

Over a dynamic range of 2000 to 1, PF = 0

AC Power Supply Rejection

VDD = 3.3 V + 120 mV rms at 50 Hz/100 Hz,

IP = 6.25 mV rms, V1P = V2P = 100 mV rms

Output Frequency Variation

0.01

DC Power Supply Rejection

VDD = 3.3 V ± 330 mV dc, IP = 6.25 mV rms,

V1P = V2P = 100 mV rms

Output Frequency Variation

0.01

Total Reactive Energy Measurement

Bandwidth

3.3

kHz

RMS MEASUREMENTS

Measurement Bandwidth

3.3

kHz

I rms and V rms

V rms Measurement Error

0.1

Over a dynamic range of 500 to 1

I rms Measurement Error

0.25

Over a dynamic range of 500 to 1

Fundamental V rms Measurement Error

0.1

Over a dynamic range of 500 to 1

Fundamental I rms Measurement Error

0.25

Over a dynamic range of 500 to 1

WAVEFORM SAMPLING

Sampling CLKIN/2048 (16.384 MHz/2048 =

8 kSPS)

Current Channels

See the Waveform Sampling Mode section

Signal-to-Noise Ratio, SNR

Signal-to-Noise-and-Distortion

(SINAD) Ratio

Total Harmonic Distortion, THD

−85

Spurious-Free Dynamic Range, SFDR

dBFS

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