STEVAL-IPE012V1 STMicroelectronics, STEVAL-IPE012V1 Datasheet - Page 17

• Manufacturer Part Number: STEVAL-IPE012V1
• Description: EVAL BOARD ENERGY METER
• Manufacturer: STMicroelectronics
• Series: -r

Specifications of STEVAL-IPE012V1

• Design Resources: STEVAL-IPE012V1 Schematic STEVAL-IPE012V1 BOM
• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: STPM10BTR, STM8L152
• Primary Attributes: Single Phase with 1 Current Transformer & Shunt
• Secondary Attributes: Tamper Detection
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11462

STPM10
Figure 14. First-order ΣΔ A/D converter
7.4
Figure 15. ZCR signal
integration and DC offset cancellation of the supplied Σ Δ signals. The gain of the
decimation filters is 1.004 for the voltage channel and 0.502 for the current channel. The
resulting signal has a resolution of 11 bits per voltage channel and 16 bits per current
channel.
Zero-crossing detection
The STPM10 has a zero-crossing detector circuit on the voltage channel which can be used
by application for synchronization of some utility equipment in the event of zero-crossing of
the line voltage. This circuit produces the internal signal ZCR which has a rising edge every
time the line voltage crosses zero, and a negative edge every time the voltage reaches its
positive or negative peak. The ZCR signal is then at twice the line voltage frequency. The
ZCR signal is available on the ZCR pin.
Input analog signal
+
Σ
-
Doc ID 17728 Rev 3
Integrator
∫
DAC
f
CLK
/4
Output digital signal
Theory of operation
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