ADE7878 datasheet(12/92 Pages) AD

12 / 92 page

ADE7878

Rev. 0 | Page 12 of 92

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

PM0

PM1

RESET

DVDD

DGND

IAP

IAN

IBP

23 VAP

24 AVDD

25 AGND

26 VDD

27 CLKIN

28 CLKOUT

29 IRQ0

30 NC

NOTES

1. NC = NO CONNECT.

2. THE EXPOSED PAD SHOULD BE CONNECTED

TO AGND.

22 VBP

21 NC

TOP VIEW

(Not to Scale)

ADE7878

Figure 6. Pin Configuration

Table 7. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 10, 11, 20,

21, 30, 31, 40

No Connect. These pins are not connected internally.

PM0

Power Mode Pin 0. This pin, combined with PM1, defines the power mode of the ADE7878, as

described in Table 8.

PM1

Power Mode Pin 1. This pin defines the power mode of the ADE7878 when combined with PM0, as

described in Table 8.

RESET

Reset Input, Active Low. In PSM0 mode, this pin should stay low for at least 10 μs to trigger a

hardware reset.

DVDD

This pin provides access to the on-chip 2.5 V digital LDO. Do not connect any external active

circuitry to this pin. Decouple this pin with a 4.7 μF capacitor in parallel with a ceramic 220 nF

capacitor.

DGND

Ground Reference. This pin provides the ground reference for the digital circuitry.

7, 8

IAP, IAN

Analog Inputs for Current Channel A. This channel is used with the current transducers and is

referenced in this document as Current Channel A. These inputs are fully differential voltage inputs

with a maximum differential level of ±0.5 V. This channel also has an internal PGA, equal to the ones

on Channel B and Channel C.

9, 12

IBP, IBN

Analog Inputs for Current Channel B. This channel is used with the current transducers and is

referenced in this document as Current Channel B. These inputs are fully differential voltage inputs

with a maximum differential level of ±0.5 V. This channel also has an internal PGA equal to the ones

on Channel C and Channel A.

13, 14

ICP, ICN

Analog Inputs for Current Channel C. This channel is used with the current transducers and is

referenced in this document as Current Channel C. These inputs are fully differential voltage inputs

with a maximum differential level of ±0.5 V. This channel also has an internal PGA equal to the ones

on Channel A and Channel B.

15, 16

INP, INN

Analog Inputs for Neutral Current Channel N. This channel is used with the current transducers and

is referenced in this document as Current Channel N. These inputs are fully differential voltage

inputs with a maximum differential level of ±0.5 V. This channel also has an internal PGA, different

from the ones found on the A, B, and C channels.

REFIN/OUT

This pin provides access to the on-chip voltage reference. The on-chip reference has a nominal

value of 1.2 V. An external reference source with 1.2 V ± 8% can also be connected at this pin. In

either case, decouple this pin to AGND with a 4.7 μF capacitor in parallel with a ceramic 100 nF

capacitor. After reset, the on-chip reference is enabled.

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