STPMS1BPQR STMicroelectronics, STPMS1BPQR Datasheet - Page 9

• Manufacturer Part Number: STPMS1BPQR
• Description: IC SMART SENSOR ASSP W/PGA 16QFN
• Manufacturer: STMicroelectronics
• Type: Smart Sensorr

Specifications of STPMS1BPQR

• Input Type: Analog
• Output Type: Digital
• Interface: Digital
• Mounting Type: Surface Mount
• Package / Case: 16-VQFN
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3.2 V
• Product: Dual Channel Smart Sensor
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-10475-2

STPMS1
5
Figure 4.
Application
The choice of external components in the transduction section of the application is a crucial
point in the application design, affecting the precision and the resolution of the whole
system.
Among the several considerations, a compromise must be found between the following
needs:
1.
2.
3.
To maximize the signal to noise ratio of the current channel the voltage divider resistors ratio
should be as close as possible to that shown in
Figure 4
●
●
●
Typical values for the current sensors sensitivity are indicated in
Timing diagram
Maximize the signal to noise ratio in the voltage and current channel
Choose the current to voltage conversion ratio Ks and the voltage divider ratio in a way
that calibration can be achieved (see also the AN2299; Fast digital calibration
procedure for STPM01 based energy meters, application note)
Choose Ks to take advantage of the whole current dynamic range according to desired
maximum current and resolution.
P = 64000 imp/kWh
INOM = 5 A
IMAX = 60 A
below shows a reference schematic for an application with the following properties:
Doc ID 16524 Rev 2
Table
6.
Table
AM07833v1
AM07833v1
6.
Application
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