參數(shù)資料
型號(hào): 71M6543G-IGTR/F
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP100
封裝: LEAD FREE, LQFP-100
文件頁數(shù): 143/157頁
文件大?。?/td> 2178K
代理商: 71M6543G-IGTR/F
71M6543F/H and 71M6543G/GH Data Sheet
86
2008–2011 Teridian Semiconductor Corporation
v1.2
4
Application Information
4.1
Connecting 5 V Devices
All digital input pins of the 71M6543 are compatible with external 5 V devices. I/O pins configured as
inputs do not require current-limiting resistors when they are connected to external 5 V devices.
4.2
Directly Connected Sensors
Figure 27 through Figure 30 show voltage-sensing resistive dividers, current-sensing current transformers
(CTs) and current-sensing resistive shunts and how they are connected to the voltage and current inputs
of the 71M6543. All input signals to the 71M6543 sensor inputs are voltage signals providing a scaled
representation of either a sensed voltage or current.
The analog input pins of the 71M6543 are designed for sensors with low source impedance.
RC filters with resistance values higher than those implemented in the Teridian Demo Boards
must not be used. Please refer to the Demo Board schematics for complete sensor input
circuits and corresponding component values.
VIN
ROUT
V3P3A
VADCn
(n = 8, 9 or 10)
Figure 27: Resistive Voltage Divider (Voltage Sensing)
IIN
IADCn
V3P3A
VOUT
IOUT
RBURDEN
CT
1:N
Noise Filter
(n = 0,1,...7)
Figure 28. CT with Single-Ended Input Connection (Current Sensing)
IIN
IADCn
IADCn+1
V3P3A
VOUT
IOUT
RBURDEN
CT
1:N
Bias Network and Noise Filter
(n = 0, 2, 4 or 6)
Figure 29: CT with Differential Input Connection (Current Sensing)
IIN
RSHUNT
IADCn
IADCn+1
V3P3A
VOUT
Bias Network and Noise Filter
(n = 2, 4 or 6)
Figure 30: Differential Resistive Shunt Connections (Current Sensing)
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