ST7538Q datasheet(14/44 Pages) STMICROELECTRONICS

14 / 44 page

Electrical characteristics

ST7538Q

14/44

Baud rate Bit Time

(=1/BAUD)

Control Register

bit 3 and bit 4

see Table 11

1667

833

417

208

µs

Zero crossing detection

ZCDEL

Zero Crossing Detection

delay (delay between the

ZCIN and ZCOUT signals)

Figure 22

µs

ZC(LOW)

Zero Crossing Detection

Low Threshold

-45

-5

ZC(HIGH)

Zero Crossing Detection

High Threshold

5+45

ZC(OFFSET)

Zero Crossing Offset

-20

+20

Operational amplifier

COUT(Sync)

Max Sync Current

COUT(Source) Max Source Current

-30

-20

-10

CIN(Offset)

Input Terminals OFFSET

-38

+38

GBWP

Gain Bandwidth Product

MHz

Serial interface

Setup Time

see Figure 5, 6, 7, 8 & 9

5ns

Hold Time

see Figure 5, 6, 7, 8 & 9

2ns

TCR

CLR/T vs. REG_DATA or

RxTx

see Figure 5, 6, 7, 8 & 9

TB/4

TCC

CLR/T vs. CLR/T

see Figure 5, 6, 7, 8 & 9

2*TB

TDS

Setup Time

see Figure 5, 6, 7, 8 & 9

TB/4

TB/2

TDH

Hold Time

see Figure 5, 6, 7, 8 & 9

TB/4

TB/2

TCRP

TB/2

Table 4. Electrical characteristics (continued)

(AVdd = DVdd = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V, -40°C

≤TA ≤ 85°C, TJ < 125 °C, fc = 86kHz,

other control register parameters as default value, unless otherwise specified)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

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