参数资料
型号: 71M6533-IGTR/F
厂商: Maxim Integrated
文件页数: 74/132页
文件大小: 0K
描述: IC ENERY METER 3PH 128K 100-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1,000
系列: Single Converter Technology®
输入阻抗: 40 千欧 ~ 90 千欧
测量误差: 0.1%
电压 - 高输入/输出: 2V
电压 - 低输入/输出: 0.8V
电流 - 电源: 10mA
电源电压: 3 V ~ 3.6 V
测量仪表类型: 三相,中性相位
工作温度: -40°C ~ 85°C
安装类型: *
封装/外壳: *
供应商设备封装: *
包装: *
71M6533/G/H and 71M6534/H Data Sheet
71M6533/71M6534
V3P3D
DIO4
EEPROM
VCC
CLK
FDS_6533_6534_004
DIO5
10 k ?
DI
DO
DIOn
100 k?
100 k?
CS
Figure 38: Three-Wire EEPROM Connection
4.5
UART0 (TX/RX)
The UART0 RX pin should be pulled down by a 10 k ? resistor and additionally protected by a 100 pF ceramic
capacitor, as shown in Figure 39 .
71M6533/71M6534
RX
TX
100 pF 10 k Ω
RX
TX
Figure 39: Connections for UART0
4.6
Optical Interface (UART1)
The OPT_TX and OPT_RX pins can be used for a regular serial interface (by connecting a RS_232
transceiver for example), or they can be used to directly operate optical components (for example, an
infrared diode and phototransistor implementing a FLAG interface). Figure 40 shows the basic connections
for UART1. The OPT_TX pin becomes active when the OPT_TXE[1:0] I/O RAM field is set to 00.
The polarity of the OPT_TX and OPT_RX pins can be inverted with the configuration bits, OPT_TXINV
and OPT_RXINV , respectively.
The OPT_TX output may be modulated at 38 kHz when system power is present. Modulation is not
available in BROWNOUT mode. The OPT_TXMOD bit enables modulation. The duty cycle is controlled
by OPT_FDC[1:0] , which can select 50%, 25%, 12.5%, and 6.25% duty cycle. A 6.25% duty cycle means
OPT_TX is low for 6.25% of the period. The OPT_RX pin uses digital signal thresholds and may need an
analog filter when receiving modulated optical signals.
With modulation, an optical emitter can be operated at higher current than nominal, enabling it to
increase the distance along the optical path.
If operation in BROWNOUT mode is desired, the external components should be connected to V3P3D.
74
Rev 2
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