Datasheet

ADE7854/ADE7858/ADE7868/ADE7878 Data Sheet
Rev. G | Page 16 of 100
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
NOTES
1. NC = NO CONNECT.
2. CREATE A SIMILAR PAD ON THE PCB UNDER THE
EXPOSED PAD. SOLDER THE EXPOSED PAD TO
THE PAD ON THE PCB TO CONFER MECHANICAL
STRENGTH TO THE PACKAGE. CONNECT THE
PADS TO AGND AND DGND.
11NC
12IBN
13ICP
15INP
17
REF
IN/OUT
16INN
18VN
19VCP
20NC
14ICN
NC
PM0
PM1
RESET
DVDD
DGND
IA
P
IAN
IBP
NC
VAP
A
VDD
AGND
VDD
CLKIN
CLKOUT
IRQ0
NC
VB
P
NC
33
CF1
34
CF2
35
CF3/HSCLK
36
SCLK/SCL
37
MISO/HSD
38
MOSI/SDA
39
SS/HSA
40
NC
32
IRQ1
31
NC
08510-106
1
2
3
4
5
6
7
8
9
10
23
24
25
26
27
28
29
30
22
21
ADE78xx
T
OP VIEW
(Not to Scale)
Figure 9. Pin Configuration
Table 8. Pin Function Descriptions
Pin No.
Mnemonic
Description
1, 10, 11, 20,
21, 30, 31, 40
NC No Connect. These pins are not connected internally. It is recommended to ground these pins.
2 PM0
Power Mode Pin 0. This pin, combined with PM1, defines the power mode of the
ADE7854/ADE7858/ADE7868/ADE7878, as described in Table 9.
3 PM1
Power Mode Pin 1. This pin defines the power mode of the ADE7854/ADE7858/ADE7868/ADE7878
when combined with PM0, as described in Table 9.
4
RESET Reset Input, Active Low. In PSM0 mode, this pin should stay low for at least 10 µs to trigger a
hardware reset.
5 DVDD
2.5 V output of the digital low dropout regulator (LDO). Decouple this pin with a 4.7 µF capacitor in
parallel with a ceramic 220 nF capacitor. Do not connect external active circuitry to this pin.
6 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. The neutral current channel is available in the
ADE7878 and ADE7868. In the ADE7858 and ADE7854, connect these pins to AGND.
17 REF
IN/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.