71M6515H-IGT/F Maxim Integrated Products, 71M6515H-IGT/F Datasheet - Page 38

• Manufacturer Part Number: 71M6515H-IGT/F
• Description: IC ENERGY METER AFE 3PH 64-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of 71M6515H-IGT/F

• Mounting Style: SMD/SMT
• Package / Case: LQFP-64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Page: 38 of 60
It is important to note that the length of the accumulation interval, as determined by SUM_CYCLES, is not an exact multiple
of 1000ms. For example, if SUM_CYCLES = 60, the resulting accumulation interval is:
Bits 13-8: These six bits (SUM_CYCLES) define the length of the accumulation interval τ per the formula:
Allowed values are 24 (400ms) through 60 (1000ms), unless the post-processor is disabled. Bit 8 is the LSB.
This means that accurate time measurements should be based on the RTC, not the accumulation interval.
Bit 14: This bit (CKOUT_DISB) disables the CKOUT pin when set. The CKOUT pin can be used for diagnostics. For EMC
compliance and power saving reasons, CKOUT_DISB should always be set.
Bit 15: This bit (ADC_DIS) disables the ADC when set, e.g. to save power. Of course, no metering or measuring can be
performed with the ADC disabled.
Bits 18-16: These three bits (TMUX) select the source for the TMUX diagnostic output pin. For EMC compliance and
power saving reasons, TMUX should be zero (default) if unused.
τ
=
A Maxim Integrated Products Brand
SUM
_
TMUX2
2520
Bit 18
CYCLES
0
0
0
0
1
1
1
1
6 .
⋅
TMUX1
42
Bit 17
0
0
1
1
0
0
1
1
© 2005−2011 Teridian Semiconductor Corporation
τ
=
TMUX0
Bit 16
32768
0
1
0
1
0
1
0
1
60
13
⋅
42
Hz
TMUX
=
0
1
2
3
4
5
6
7
2520
2520
.
62
Signal Selected for the TMUX Pin
GND
MUX_SYNC
RTM
RTC Output
CE_BUSY
XFER_BUSY
VX_OK (Comparator Output)
V3P3/2 =1.5V internal analog voltage
Hz
=
999
.
75
ms
Energy Meter IC
DATA SHEET
71M6515H
JULY 2011
1.6