71m6545h-igtr/f Maxim Integrated Products, Inc., 71m6545h-igtr/f Datasheet - Page 71
71m6545h-igtr/f
Manufacturer Part Number
71m6545h-igtr/f
Description
Metrology Processors
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.71M6545H-IGTRF.pdf
(134 pages)
- Current page: 71 of 134
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(CTs) and current-sensing resistive shunts and how they are connected to the voltage and current inputs
of the 71M6545/H. All input signals to the 71M6545/H sensor inputs are voltage signals providing a
scaled representation of either a sensed voltage or current.
PDS_6545_009
4
4.1
All digital input pins of the 71M6545/H 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
Figure 23
v1.0
APPLICATION INFORMATION
Connecting 5 V Devices
Directly Connected Sensors
through
The analog input pins of the 71M6545/H 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.
Figure 26: Differential Resistive Shunt Connections (Current Sensing)
Figure 24. CT with Single-Ended Input Connection (Current Sensing)
Figure 25: CT with Differential Input Connection (Current Sensing)
Figure 26
Figure 23: Resistive Voltage Divider (Voltage Sensing)
CT
© 2008–2011 Teridian Semiconductor Corporation
show voltage-sensing resistive dividers, current-sensing current transformers
I
IN
1:N
CT
I
I
IN
R
IN
1:N
SHUNT
I
V
OUT
IN
V
I
R
OUT
OUT
BURDEN
R
Bias Network and Noise Filter
BURDEN
V
OUT
V3P3A
Bias Network and Noise Filter
V
OUT
V3P3A
R
Noise Filter
OUT
(n = 8, 9 or 10)
VADCn
V3P3A
(n = 0,1,...7)
(n = 2, 4 or 6)
IADCn
V3P3A
IADCn+1
IADCn
(n = 0, 2, 4 or 6)
IADCn
IADCn+1
Data Sheet 71M6545/H
71
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