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ADE7518
ANALOG INPUTS
7
6
5
GAIN[7:0]
4 3 2
1
0
The ADE7518 has two fully differential voltage input channels.
0
0
0
0
0
0
0
0
The maximum differential input voltage for input pairs V P /V N
and I P /I N is ±0.4 V.
Each analog input channel has a programmable gain amplifier
(PGA) with possible gain selections of 1, 2, 4, 8, and 16. The
gain selections are made by writing to the GAIN register (see
V P
GAIN (K)
SELECTION
Table 36 and Figure 36). Bit 0 to Bit 2 select the gain for the PGA
in the current channel, and Bit 5 to Bit 7 select the gain for the
PGA in the voltage channel. Figure 35 shows how a gain selection
for the current channel is made using the gain register.
V IN
V N
K × V IN
Figure 35. PGA in Current Channel
GAIN REGISTER*
CURRENT AND VOLTAGE CHANNELS PGA CONTROL
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
ADDR:
0x1B
PGA2 GAIN SELECT
000 = ×1
001 = ×2
010 = ×4
011 = ×8
100 = ×16
PGA1 GAIN SELECT
000 = ×1
001 = ×2
010 = ×4
011 = ×8
100 = ×16
CFSIGN_OPT
RESERVED
*REGISTER CONTENTS SHOW POWER-ON DEFAULTS.
Figure 36. Analog Gain Register
Rev. 0 | Page 40 of 128
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