ade7518 Analog Devices, Inc., ade7518 Datasheet - Page 40

• Manufacturer Part Number: ade7518
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc, And Lcd Driver
• Manufacturer: Analog Devices, Inc.

ADE7518
ANALOG INPUTS
The ADE7518 has two fully differential voltage input channels.
The maximum differential input voltage for input pairs V
and I
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
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.
P
/I
N
is ±0.4 V.
P
/V
Rev. 0 | Page 40 of 128
N
PGA2 GAIN SELECT
000 = ×1
001 = ×2
010 = ×4
011 = ×8
100 = ×16
*REGISTER CONTENTS SHOW POWER-ON DEFAULTS.
CURRENT AND VOLTAGE CHANNELS PGA CONTROL
V
V
V
N
P
IN
Figure 35. PGA in Current Channel
7
0
Figure 36. Analog Gain Register
7
0
6
0
6
0
GAIN REGISTER*
5
0
5
0
GAIN[7:0]
K × V
4
0
4
0
3
0
IN
3
0
2
0
CFSIGN_OPT
RESERVED
2
0
1
0
1
0
GAIN (K)
SELECTION
0
0
PGA1 GAIN SELECT
000 = ×1
001 = ×2
010 = ×4
011 = ×8
100 = ×16
0
0
ADDR:
0x1B