ST7538 データシートの表示（PDF） - STMicroelectronics
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ST7538 Datasheet PDF : 30 Pages
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ST7538
Table 5. Electrical Characteristcs (continued)
(AVcc = DVcc = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V,-40°C ≤ Tamb ≤ 85°C, Fc = 86kHz, other Control
Register parameters as default value, unless otherwise specified).
Symbol
VATOP(AC)
Parameter
Max Carrier Output AC Voltage
for each ATOP1 and ATOP2
pins
Test Condition
RCL = 1.75kΩ ; Vsense (AC) = 0V
PAVcc ≥ -V----A-----T----O-----P----(---A----C-----) + 7.5V
2
Min.
3.5
Typ.
4.6
Max.
7
Unit
Vpp
VATOP(DC) Output DC Voltage on ATOP1
and ATOP2 pins
3.5
4.2
5
V
HD2ATOP Second Harmonic Distortion on VATOP = 4VPP , PAVCC = 10V
each ATOP1 and ATOP2 pins No Load
-55
-42
dB
Differential Second Harmonic
Distortion
VATOP = 4VPP , PAVCC = 10V
RLOAD =50Ω (Differential)
Carrier Frequency: 132.5KHz
-65
-53
dB
HD3ATOP Third Harmonic Distortion on VATOP = 4VPP , PAVCC = 10V
-56
-49
dB
each ATOP1 and ATOP2 pins No Load.
Differential Third Harmonic
t(s) Distortion
VATOP = 4VPP , PAVCC = 10V
RLOAD =50Ω (Differential)
Carrier Frequency: 132.5KHz
c VATOP Accuracy with Voltage Control RCL = 1.75kΩ; Vsense (AC) = 0V
-1
u Loop Active
d GSTEP ALC Gain Step Control loop
0.6
ro gain step
P DRNG ALC Dynamic Range
te VCLTH Voltage control loop reference Figure 15
160
threshold on Vsense pin
ole VCLHYST Hysteresis on Voltage loop
s reference threshold
Figure 15
b CCLTH Current control loop reference Figure 15
O threshold on Csense pin
1.80
- CCLHYST Hysteresis on Current loop
Figure 15
210
) reference threshold
t(s VSENSE (DC) Output DC Voltage on VSENSE
c VSENSE VSENSE Input Impedance
rodu TRxTx Carrier Activation Time
Figure 18 - 600 Baud Xtal=16MHz 0.01
Figure 18- 1200 Baud
0.01
Xtal=16MHz
P Figure 18- 2400 Baud
0.01
te Xtal=16MHz
le Figure 18- 4800 Baud
0.01
o Xtal=16MHz
ObsTALC
Carrier Stabilization Time
Figure 18.
From STEP 16 to zero or From Xtal =16MHz
-65
1
30
180
±18
1.90
250
1.865
36
-52
+1
1.4
200
2.00
290
1.6
800
400
200
3.2
dB
GSTEP
dB
dB
mVPK
mV
V
mV
V
KΩ
ms
µs
µs
µs
ms
step 16 to step 31,
TST
Tstep
Figure 18
Xtal =16MHz
200
µs
Receiver
VIN
Input Sensitivity (Normal Mode)
Input Sensitivity (High Sens.)
VIN
Maximum Input Signal
0.5
2 mVrms
250
µVrms
2
Vrms
6/30
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