AN3213 datasheet(5/64 Pages) STMICROELECTRONICS

5 / 64 page

AN3213

List of figures

Doc ID 17429 Rev 1

5/64

List of figures

Figure 1.

ST7570 demonstration board with outline dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

I(VCC) vs. I(PA_OUT) curve - typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 3.

ST7570 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 4.

Board drawing with indication of the various sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 5.

Global view of the ST7570 demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 6.

ST7570 schematic circuit (part 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 7.

Power supply section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 8.

UART interface section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 9.

External microcontroller connection section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 10.

ST7570 schematic circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 11.

Reset circuit section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 12.

JTAG lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 13.

Current limit setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 14.

Non-isolated zero crossing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 15.

USB to UART connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 16.

Reception and transmission filter schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 17.

Measured frequency response of the transmission active filter (typical) . . . . . . . . . . . . . . 27

Figure 18.

Montecarlo simulation of the transmission active filter frequency response . . . . . . . . . . . . 28

Figure 19.

Measured frequency response of the reception passive filter (typical) . . . . . . . . . . . . . . . . 29

Figure 20.

Montecarlo simulation of the reception passive filter response . . . . . . . . . . . . . . . . . . . . . 30

Figure 21.

Measured frequency response of the Tx active + passive filter loaded with the EN50065-1

LISN impedance (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 22.

Montecarlo simulation of the transmission line coupling response loaded with the

EN50065-1 LISN impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 23.

Non-isolated zero crossing coupling circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 24.

ZC_IN_A vs. mains voltage - delay measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 25.

ZC_IN_A vs. mains voltage - jitter measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 26.

Measured input impedance modulus of the line coupling - reception mode (typical) . . . . . 35

Figure 27.

Measured input impedance modulus of the line coupling - transmission mode (typical) . . 35

Figure 28.

Conducted emissions test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 29.

Conducted emissions: transmission spectrum, quasi-peak measurement, 3 kHz - 150 kHz,

line-to-earth, as per EN50065-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 30.

Conducted emissions: transmission spectrum, quasi-peak measurement, 3 kHz - 150 kHz,

neutral-to-earth, as per EN50065-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 31.

Conducted emissions: transmission spectrum, quasi-peak measurement, 150 kHz - 30 MHz,

line-to-earth, as per EN50065-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 32.

Conducted emissions: transmission spectrum, quasi-peak measurement, 150 kHz - 30 MHz,

neutral-to-earth, as per EN50065-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 33.

Noise immunity test setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 34.

Measured BER vs. SNR curve (typical), white noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 35.

Example of stencil openings for the QFN48 package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 36.

PCB copper dissipating area on top layer for the ST7570 demonstration board . . . . . . . . 42

Figure 37.

PCB copper dissipating area on bottom layer for the ST7570 demonstration board . . . . . 42

Figure 38.

Packet-fragmented transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 39.

Measured ST7570 thermal impedance curve (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 40.

Simulation model of the thermal impedance ZthJA of the ST7570 mounted on the

demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 41.

Carrier frequency deviation vs. crystal tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

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