Electrical characteristics ST7538Q
14/44
T
B
Baud rate Bit Time
(=1/
BAUD
)
Control Register
bit 3 and bit 4
see Ta bl e 1 1
1667
833
417
208
µs
Zero crossing detection
ZC
DEL
Zero Crossing Detection
delay (delay between the
ZCIN and ZCOUT signals)
Figure 22 1 µs
ZC
(LOW)
Zero Crossing Detection
Low Threshold
-45 -5 mV
ZC
(HIGH)
Zero Crossing Detection
High Threshold
5+45mV
ZC
(OFFSET)
Zero Crossing Offset -20 +20 mV
Operational amplifier
C
OUT(Sync)
Max Sync Current 15 28 45 mA
C
OUT(Source)
Max Source Current -30 -20 -10 mA
C
IN(Offset)
Input Terminals OFFSET -38 +38 mV
GBWP Gain Bandwidth Product 6 7 9 MHz
Serial interface
Ts Setup Time see Figure 5, 6, 7, 8 & 9 5ns
T
H
Hold Time see Figure 5, 6, 7, 8 & 9 2ns
T
CR
CLR/T vs. REG_DATA or
RxTx
see Figure 5, 6, 7, 8 & 9
T
B
/4
T
CC
CLR/T vs. CLR/T see Figure 5, 6, 7, 8 & 9
T
B
2*T
B
T
DS
Setup Time see Figure 5, 6, 7, 8 & 9
T
B
/4 T
B
/2
T
DH
Hold Time see Figure 5, 6, 7, 8 & 9
T
B
/4 T
B
/2
T
CRP
T
H
T
B
/2
Table 4. Electrical characteristics (continued)
(AVdd = DVdd = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V, -40°C
≤
T
A
≤
85°C, T
J
< 125 °C, fc = 86kHz,
other control register parameters as default value, unless otherwise specified)
Symbol Parameter Test condition Min Typ Max Unit
