參數(shù)資料
型號： 71M6533-IGTR/F
廠商： TERIDIAN SEMICONDUCTOR CORP
元件分類： 模擬信號調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQFP100
封裝： LEAD FREE, LQFP-100
文件頁數(shù)： 123/124頁
文件大?。?/td> 2008K
代理商： 71M6533-IGTR/F
71M6533/71M6534 Data Sheet
FDS_6533_6534_004
98
2007-2009 TERIDIAN Semiconductor Corporation
v1.1
The maximum time jitter is1/6 of the MUX cycle period (nominally 67 s) and is independent of the num-
ber of pulses measured. Thus, if the pulse generator is monitored for one second, the peak jitter is 67
ppm. After 10 seconds, the peak jitter is 6.7 ppm. The average jitter is always zero. If it is attempted to
drive either pulse generator faster than its maximum rate, it will simply output at its maximum rate without
exhibiting any rollover characteristics. The actual pulse rate, using WSUM as an example, is:
Hz
X
F
WSUM
WRATE
RATE
S
46
2
=
,
where FS = sampling frequency (2520.6 Hz), X = Pulse speed factor derived from the CE variables
PULSE_SLOW and PULSE_FAST.
Table 59: CE Pulse Generation Parameters
CE Ad-
dress
Name
Default
Description
0x21
WRATE
171
Kh = VMAX*IMAX*66.1782 / (In_8*WRATE*NACC*X) Wh/pulse.
0x22
KVAR
6448
Scale factor for VAR measurement.
0x23
SUM_PRE
2520
PRE_SAMPS * SUM_CYCLES (NACC)
0x41
APULSEW
0
Wh pulse (WPULSE) generator input to be updated by the MPU
when using external pulse generation. The output pulse rate is:
APULSEW * FS * 2
-32 * WRATE * X * 2-14.
This input is buffered and can be updated by the MPU during a
conversion interval. The change will take effect at the begin-
ning of the next interval.
0x38
PULSEWIDTH
12
Register for pulse width control of XPULSE and YPULSE. The
maximum pulse width is (2*PULSEWIDTH+1)*(1/FS). The default
value will generate pulses of 10 ms width at FS = 2520.62 Hz.
0x42
APULSER
0
VARh (RPULSE) pulse generator input.
0x43
APULSEX
0
Pulse generator input for XPULSE output.
0x44
APULSEY
0
Pulse generator input for YPULSE output.
0x45
WSUM_ACCUM
0
Roll-over accumulator for WPULSE.
0x46
VSUM_ACCUM
0
Roll-over accumulator for RPULSE.
0x47
SUM2_ACCUM
0
Roll-over accumulator for the XPULSE pulse output.
0x48
SUM3_ACCUM
0
Roll-over accumulator for the YPULSE pulse output.
Other CE Parameters
Table 60 shows the CE parameters used for suppression of noise due to scaling and truncation effects.
Table 60: CE Parameters for Noise Suppression and Code Version
CE Ad-
dress
Name
Default
Description
0x26
QUANTA
0
These parameters are added in channel A to the Watt calcula-
tion to compensate for input noise and truncation.
LSB = (VMAX*IMAX / In_8) *1.04173*10
-9 W
0x27
QUANTB
0
0x28
QUANTC
0
0x2A
QUANT_VARA
0
These parameters are added to the VAR calculation for element
A and B to compensate for input noise and truncation.
LSB = (VMAX*IMAX / In_8) * 1.04173*10
-9 W
0x2B
QUANT_VARB
0
0x2C
QUANT_VARC
0
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