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| 型号： | 71M6542F-IGT/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/166页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING |
| 标准包装： | 90 |
| 系列： | * |
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71M6541D/F/G and 71M6542F/G Data Sheet
The performance of the IAP-IAN pins can be enhanced by enabling a pre-amplifier with a fixed gain of 8,
using the I/O RAM control bit PRE_E (I/O RAM 0x2704[5]) . When PRE_E = 1, IAP-IAN become the inputs
to the 8x pre-amplifier, and the output of this amplifier is supplied to the multiplexer. The 8x amplification
is useful when current sensors with low sensitivity, such as shunt resistors, are used. With PRE_E set, the
IAP-IAN input signal amplitude is restricted to 31.25 mV peak.
For the 71M654x application utilizing two shunt resistor sensors ( Figure 3 ), the IAP-IAN pins are configured
for differential mode to interface to a local shunt by setting the DIFFA_E control bit. Meanwhile, the IBP-IBN
pins are re-configured as digital balanced pair to communicate with a 71M6x01 Isolated Sensor interface by
setting the RMT_E control bit ( I/O RAM 0x2709[3] ). The 71M6x01 communicates with the 71M654x using a
bi-directional digital data stream through an isolating low-cost pulse transformer. The 71M654x also supplies
power to the 71M6x01 through the isolating transformer. This type of interface is further described at the
end of this chapter (see 2.2.8 71M6x01 Isolated Sensor Interface (Remote Sensor Interface) ).
For use with Current Transformers (CTs), as shown in Figure 2 , the RMT_E control bit is reset, so that the
IBP-IBN pins are configured as local analog inputs. The IAP-IAN pins cannot be configured as a remote
sensor interface.
2.2.2
Input Multiplexer
When operating with local sensors, the input multiplexer sequentially applies the input signals from the analog
input pins to the input of the ADC (see Figure 2 and Figure 4 ). One complete sampling sequence is called a
multiplexer frame. The multiplexer of the 71M6541D/F can select up to three input signals (IAP-IAN, VA, and
IBP-IBN) per multiplexer frame as controlled by the I/O RAM control field MUX_DIV[3:0] (I/O RAM
0x2100[7:4]) (see Figure 6 ) . The multiplexer of the 71M6542F/G adds the VB signal to achieve a total
of four inputs (see Figure 7 ). The multiplexer always starts at state 1 and proceeds until as many
states as determined by MUX_DIV[3:0] have been converted.
The 71M6541D/F/G and 71M6542F/G each require a unique CE code that is written for the specific
application. Moreover, each CE code requires specific AFE and MUX settings in order to function
properly. Table 1 provides the CE code and settings corresponding to the local sensor configurations
shown in Figure 2 and Figure 4 . Table 2 provides the CE code and settings corresponding to the
Table 1. Required CE Code and Settings for Local Sensors
I/O RAM
Mnemonic
I/O RAM
Location
71M6541D/F/G
(hex)
71M6542F/G
(hex)
Eq. 0 or 1 Eq. 2
FIR_LEN[1:0]
ADC_DIV
PLL_FAST
MUX_DIV[3:0] 1
MUX0_SEL[3:0]
MUX1_SEL[3:0]
MUX2_SEL[3:0]
MUX3_SEL[3:0]
RMT_E
DIFFA_E
DIFFB_E
EQU[2:0]
CE Code
Equations
210C[2:1]
2200[5]
2200[4]
2100[7:4]
2105[3:0]
2105[7:4]
2104[3:0]
2104[7:4]
2709[3]
210C[4]
210C[5]
2106[7:5]
--
--
1
1
1
3
0
A
2
1
0
1
1
0 or 1
CE41A01
0 or 1
1
1
1
3
0
A
2
1
0
1
1
0 or 1
CE41A01
0 or 1
2
0
1
4
0
A
2
9
0
1
1
2
CE41A04
2
Current Sensor Types
--
1 Shunt and 1 CT
or
2 CTs
1 Shunt and 1 CT
or
2 CTs
1 Shunt and 1 CT
or
2 CTs
Applicable Figure
--
Notes:
1 . MUX_DIV[3:0] must be set to 0 while writing the other RAM locations in this table.
Maxim updates the CE code periodically. Contact your local Maxim representative to obtain the latest CE code and
the associated settings. The configuration presented in this table is set by the MPU demonstration code during
initialization.
Rev 4
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| 71M6542F-IGTR/F | 功能描述:计量片上系统 - SoC Precision Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6542FT-IGT/F | 制造商:Maxim Integrated Products 功能描述:1-PHASE SOC 128KB WITH PREC TEMP SENSOR - Rail/Tube |
| 71M6542FT-IGTR/F | 制造商:Maxim Integrated Products 功能描述:1-PHASE SOC, 64KB FLASH, PRES TEMP SENSOR - Tape and Reel |
| 71M6542G | 制造商:未知厂家 制造商全称:未知厂家 功能描述:71M6541D/71M6541F/71M6541G/71M6542F/71M6542G 是 TeridianTM 的第4 代高集成度单相电表SoC |
| 71M6542G-IGT/F | 功能描述:计量片上系统 - SoC 1-Phase Metering SOC with 128KB Flash RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
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