AN4472 datasheet(13/44 Pages) STMICROELECTRONICS

部件名	AN4472

功能描述	STEVAL-IME008V1 evaluation board based on the STHV749 transmission pulser

PDF	44 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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13 / 44 page

DocID026198 Rev 1

13/44

AN4472

Hardware layout and configuration

Figure 7. Acquisition by Program 0 with SEL=0, where C1, C2, C3 and C4 are XDCR_1,

XDCR_2, XDCR_3 and XDCR_4 respectively

3.4.3

Pattern Program 1 (SEL = 1, 5-level output option)

The second pattern stored in the SPI Flash is described in Table 10, where the output

pulses are delayed by 10 ns each. The state sequence is given in Table 11.

The test conditions applied to generate the waveforms in Figure 8 and Figure 9 are:

– HVP0 = + 80 V

– HVP1 = + 40 V

– HVM0 = - 80 V

– HVM1 = - 40 V

– Load: 300 pF // 100

Ω

Table 10. Program “1”

mode

Frequency

[MHz]

Number of

pulses

Initial pulse

PRF

H-Bridge

XDCR_1

positive

150 µs

TX0, TX1

XDCR_2

positive

150 µs

TX0, TX1

XDCR_3

positive

150 µs

TX1, TX1

XDCR_4

positive

150 µs

TX1, TX1

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