Datasheet

ST7538Q Electrical characteristics
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HD2
ATO
Second Harmonic
Distortion on ATO
V
ATO
= 2V
PP
-55 -42
dB
c
HD3
ATO
Third Harmonic Distortion
on ATO
-52 -49
dB
c
IATOP
Output Transmitting
Current in programmable
current limiting
Rcl = 1.85kΩ; R
LOAD
=
1Ω (as in Figure 14)
250 310 370 mArms
V
ATOP(AC )
Max Carrier Output AC
Voltage for each ATOP1
and ATOP2 pins
R
CL
= 1.t5kΩ
Vsense
(AC) = 0V
3.5 4.6 6
V
pp
V
ATOP(D C )
Output DC Voltage on
ATOP1 and ATOP2 pins
3.5 4.2 5 V
HD2
ATOP
Second Harmonic
Distortion on each ATOP1
and ATOP2 pins
V
ATO P
= 4V
PP
,
PAVCC = 10V
No Load
-55 -42
dB
c
V
ATO P
= 4V
PP
,
PAVCC = 10V
R
LOAD
=50Ω (Differential)
Carrier Frequency:
132.5KHz
-65 -53
dB
c
HD3
ATOP
Third Harmonic Distortion
on each ATOP1 and
ATOP2 pins
V
ATO P
= 4V
PP
,
PAVCC = 10V
No Load.
-56 -49
dB
c
V
ATO P
= 4V
PP
,
PAVCC = 10V
R
LOAD
=50Ω (Differential)
Carrier Frequency:
132.5KHz
-65 -52
dB
c
VATOP
Accuracy with Voltage
Control Loop Active
R
CL
= 1.75Ω;
Vsense
(AC) = 0V
-1 +1 GST
GST
ALC Gain Step Control
loop gain step
0.6 1 1.4 dB
DRNG ALC Dynamic Range 30 dB
Vsense
TH
Voltage control loop
reference threshold on
V
sense
pin
Figure 14 160 180 200
mV
PK
Vsense
HYS
Hysteresis on Voltage loop
reference threshold
Figure 14 ±18 mV
V
SENSE(DC)
Output DC Voltage on
VSENSE
1.865 V
V
SENSE
VSENSE Input Impedance 36 kΩ
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
PAVcc
VATOP AC()
2
------------------------------------ 7.5V+≥