71M6542F-IGT/F Maxim Integrated Products, 71M6542F-IGT/F Datasheet - Page 92
![no-image](/images/manufacturer_photos/0/4/417/maxim_integrated_products_sml.jpg)
71M6542F-IGT/F
Manufacturer Part Number
71M6542F-IGT/F
Description
PMIC Solutions Precision Energy Meter IC
Manufacturer
Maxim Integrated Products
Type
Metering SoCr
Datasheet
1.71M6541F-DB.pdf
(165 pages)
Specifications of 71M6542F-IGT/F
Core
8051
Core Architecture
8051
Data Bus Width
8 bit
Data Ram Size
5 KB
Device Million Instructions Per Second
5 MIPS
Interface Type
I2C, ICE, SPI, UART
Maximum Clock Frequency
5 MHz
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Number Of Programmable I/os
51
Number Of Timers
2
On-chip Adc
22 bit
Operating Supply Voltage
3 V to 3.6 V
Package / Case
LQFP-100
Processor Series
8051
Program Memory Size
64 KB
Program Memory Type
Flash
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
71M6542F-IGT/F
Manufacturer:
AD
Quantity:
1 500
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4
4.1
All digital input pins of the 71M654x 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 31
(CTs) and current-sensing resistive shunts and how they are connected to the voltage and current inputs
of the 71M654x. All input signals to the 71M654x sensor inputs are voltage signals providing a scaled
representation of either a sensed voltage or current.
92
Application Information
Connecting 5 V Devices
Direct Connection of Sensors
through
The analog input pins of the 71M654x 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 34: Differential Resistive Shunt Connections (Current Sensing)
Figure 32. CT with Single-Ended Input Connection (Current Sensing)
Figure 33: CT with Differential Input Connection (Current Sensing)
Figure 34
Figure 31: Resistive Voltage Divider (Voltage Sensing)
CT
© 2008–2011 Teridian Semiconductor Corporation
I
IN
1:N
show voltage-sensing resistive dividers, current-sensing current transformers
CT
I
I
IN
R
IN
1:N
I
SHUNT
OUT
V
IN
R
V
I
BURDEN
OUT
OUT
R
Bias Network and Noise Filter
BURDEN
V
OUT
R
IN
V3P3A
Bias Network and Noise Filter
V
OUT
V3P3A
R
Noise Filter
OUT
V3P3A
VA
V3P3A
IAP
IAP
IAN
IAN
IAP
v1.1
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