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| 型號(hào)： | 71M6543H-IGTR/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 封裝： | LEAD FREE, LQFP-100 |
| 文件頁(yè)數(shù)： | 69/157頁(yè) |
| 文件大?。?/td> | 2178K |
| 代理商： | 71M6543H-IGTR/F |
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71M6543F/H and 71M6543G/GH Data Sheet
v1.2
2008–2011 Teridian Semiconductor Corporation
19
Delay compensation and other functions in the CE code require the settings for MUX_DIV[3:0],
MUXn_SEL[3:0], RMT_E, FIR_LEN[1:0], ADC_DIV and PLL_FAST to be fixed for a given CE code.
Table 3 summarizes the I/O RAM registers used for configuring the multiplexer, signals pins, and ADC. All
listed registers are 0 after reset and wake from battery modes, and are readable and writable.
Table 3: Multiplexer and ADC Configuration Bits
Name
Location
Description
MUX0_SEL[3:0]
2105[3:0]
Selects the ADC input converted during time slot 0.
MUX1_SEL[3:0]
2105[7:4]
Selects the ADC input converted during time slot 1.
MUX2_SEL[3:0]
2104[3:0]
Selects the ADC input converted during time slot 2.
MUX3_SEL[3:0]
2104[7:4]
Selects the ADC input converted during time slot 3.
MUX4_SEL[3:0]
2103[3:0]
Selects the ADC input converted during time slot 4.
MUX5_SEL[3:0]
2103[7:4]
Selects the ADC input converted during time slot 5.
MUX6_SEL[3:0]
2102[3:0]
Selects the ADC input converted during time slot 6.
MUX7_SEL[3:0]
2102[7:0]
Selects the ADC input converted during time slot 7.
MUX8_SEL[3:0]
2101[3:0]
Selects the ADC input converted during time slot 8.
MUX9_SEL[3:0]
2101[7:0]
Selects the ADC input converted during time slot 9.
MUX10_SEL[3:0]
2100[3:0]
Selects the ADC input converted during time slot 10.
ADC_DIV
2200[5]
Controls the rate of the ADC and FIR clocks.
MUX_DIV[3:0]
2100[7:4]
The number of ADC time slots in each multiplexer frame (maximum = 11).
PLL_FAST
2200[4]
Controls the speed of the PLL and MCK.
FIR_LEN[1:0]
210C[2:1]
Determines the number of ADC cycles in the ADC decimation FIR filter.
DIFF0_E
210C[4]
Enables the differential configuration for analog input pins IADC0-IADC1 .
DIFF2_E
210C[5]
Enables the differential configuration for analog input pins IADC2-IADC3 .
DIFF4_E
210C[6]
Enables the differential configuration for analog input pins IADC4-IADC5 .
DIFF6_E
210C[7]
Enables the differential configuration for analog input pins IADC6-IADC7 .
RMT2_E
2709[3]
Enables the remote sensor interface transforming pins IADC2-IADC3 into a digital
interface for communications with a 71M6xx3 sensor.
RMT4_E
2709[4]
Enables the remote sensor interface transforming pins IADC4-IADC5 into a digital
interface for communications with a 71M6xx3 sensor.
RMT6_E
2709[5]
Enables the remote sensor interface transforming pins IADC6-IADC7 into a digital
interface for communications with a 71M6xx3 sensor.
PRE_E
2704[5]
Enables the 8x pre-amplifier.
Refer to Table 71 starting on page 104 for more complete details about these I/O RAM locations.
2.2.3
Delay Compensation
When measuring the energy of a phase (i.e., Wh and VARh) in a service, the voltage and current for that
phase must be sampled at the same instant. Otherwise, the phase difference,
Ф, introduces errors.
o
delay
o
delay
f
t
T
t
360
=
=
φ
Where f is the frequency of the input signal, T = 1/f and tdelay is the sampling delay between current and
voltage.
Traditionally, sampling is accomplished by using two A/D converters per phase (one for voltage and the
other one for current) controlled to sample simultaneously. Teridian’s Single-Converter Technology,
however, exploits the 32-bit signal processing capability of its CE to implement “constant delay” all-pass
filters. The all-pass filter corrects for the conversion time difference between the voltage and the
corresponding current samples that are obtained with a single multiplexed A/D converter.
The “constant delay” all-pass filter provides a broad-band delay 360
o -
θ, which is precisely matched to
the difference in sample time between the voltage and the current of a given phase. This digital filter does
not affect the amplitude of the signal, but provides a precisely controlled phase response.
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| 71M6543F-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6543H-IGT/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6543G-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 71M6543GH-IGTR/F | SPECIALTY ANALOG CIRCUIT, PQFP100 |
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