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STPM01FTR Datasheet(PDF) 16 Page - STMicroelectronics

Part # STPM01FTR
Description  Programmable single phase energy metering IC
PDF  56 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPM01FTR Datasheet(HTML) 16 Page - STMicroelectronics

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Theory of operation
STPM01
16/56
The maximum differential input voltage is dependent on the selected gain according to the
following table.
The gain register is included in the Device Configuration Register with the address names
PST and ADDG. The table below shows the gain configuration according to the register
values:
Both the voltage and current channels implement an active offset correction architecture
which gives the benefit to avoid any offset compensation.
The analog voltage and current signals are processed by the
∑∆ Analog to digital converters
that feed the hardwired DSP. The DSP implements an automatic digital offset cancellation
that make possible avoiding any manual offset calibration on the analog inputs.
Table 8.
Gain of voltage and current channels
Voltage channels
Current channels
Gain
Max Input voltage (V)
Gain
Max input voltage (V)
4
±0.30
8X
±0.15
16X
±0.075
24X
±0.05
32X
±0.035
Table 9.
Configuration of current sensors
Primary
Secondary
Configuration Bits
Gain
Sensor
Gain
Sensor
PST (3 bits)
ADDG (1 bit)
8
Rogowsky Coil
Disabled (No Tamper)
00
16
01
24
10
32
11
8CT
2
X
32
Shunt
3
X
8
Rogowsky Coil
8
Rogowsky Coil
40
16
16
4
1
24
24
5
0
32
32
5
1
8
CT
8CT6
X
8
32
Shunt
7
X



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