MAXQ3181-RAN+ Maxim Integrated Products, MAXQ3181-RAN+ Datasheet - Page 70
MAXQ3181-RAN+
Manufacturer Part Number
MAXQ3181-RAN+
Description
IC AFE POLYPHASE LO-PWR 28-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAXQ3181-RAN.pdf
(84 pages)
Specifications of MAXQ3181-RAN+
Number Of Channels
8
Power (watts)
35mW
Voltage - Supply, Analog
3.3V
Voltage - Supply, Digital
3.3V
Package / Case
28-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Bits
-
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Low-Power, Active Energy, Polyphase AFE
This register contains the number of line cycles that will be accumulated in a single DSP cycle. When CYCNT line
cycles have been accumulated, the DSP performs power, power factor, and energy calculations. By default, the
cycle count is 0x10 (16 decimal).
The NS register defines the fundamental timing for the electricity meter. It defines a DSP cycle in terms the period of
the ADC scan frame. Generally, this register is calculated and updated automatically by the MAXQ3181 firmware
based on the zero-crossing detection, and whether noise rejection (REJ_NS) and averaging (AVG_NS) are enabled.
Host code can write to this register in order to set the desired DSP cycle duration. The duration of one scan frame
(t
70
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
FR
) is represented as 0x00010000.
______________________________________________________________________________________
15
31
23
15
7
7
14
30
22
14
6
6
13
29
21
13
5
5
Number of Scan Frames per DSP Cycle (NS) (0x040)
Fractional Portion, High Byte
Fractional Portion, Low Byte
Integer Portion, High Byte
Integer Portion, Low Byte
Cycle Count High Byte
Cycle Count Low Byte
12
28
20
12
4
4
0x00
0x10
0x03
0xE8
0x00
0x00
11
27
19
11
3
3
Cycle Count (CYCNT) (0x01C)
10
26
18
10
2
2
25
17
9
1
9
1
24
16
8
0
8
0
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