ST7538
ELECTRICAL CHARACTERISTCS
(continued)
(AVcc = DVcc = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V,-40°C
≤
Tamb
≤
85°C, unless otherwise specified)
Symbol
HD2
ATOP
Parameter
Second Harmonic Distortion on
each ATOP1 and ATOP2 pins
Test Condition
V
ATOP
= 4V
PP
No Load
V
ATOP
= 4V
PP
R
LOAD
=50Ω (Differential)
Carrier Frequency: 132.5KHz
HD3
ATOP
Third Harmonic Distortion on
each ATOP1 and ATOP2 pins
V
ATOP
= 4V
PP
No Load.
V
ATOP
= 4V
PP
R
LOAD
=50Ω (Differential)
Carrier Frequency: 132.5KHz
VATOP
GST
DRNG
VCL
TH
VCL
HYST
CCL
TH
CCL
HYST
V
SENSE
T
RxTx
Accuracy with Voltage Control
Loop Active
ALC Gain Step Control loop
gain step
ALC Dynamic Range
Voltage control loop reference
threshold on V
sense
pin
Hysteresis on Voltage loop
reference threshold
Current control loop reference
threshold on C
sense
pin
Hysteresis on Voltage loop
reference threshold
VSENSE Input Impedance
Carrier Activation Time
Figure 16 - 600 Baud Xtal=16MHz
Figure 16- 1200 Baud
Xtal=16MHz
Figure 16- 2400 Baud
Xtal=16MHz
Figure 16- 4800 Baud
Xtal=16MHz
TALC
Carrier Stabilization Time
From STEP 16 to zero or From
step 16 to step 31,
Tstep
Figure 16.
Xtal =16MHz
Figure 16
Xtal =16MHz
1
500
2
80
100
1
500
77
85
140
2
0.01
0.01
0.01
0.01
Figure 13
Figure 13
Figure 13
Figure 13
1.80
210
170
R
CL
= 0Ω
-1
0.6
1
30
190
+-19
1.90
250
36
1.6
800
400
200
3.2
2.00
290
210
Min.
Typ.
-55
-65
Max.
-42
-53
Unit
dB
dB
-56
-65
-49
-52
dB
dB
+1
1.4
GST
dB
dB
mV
PK
mV
V
mV
KΩ
ms
µs
µs
µs
ms
T
ST
Receiver
V
IN
V
IN
R
IN
V
CD
200
µs
Input Sensitivity (Normal Mode)
Input Sensitivity (High Sens.)
Maximum Input Signal
Input Impedance
Carrier Detection Sensitivity
(Normal Mode)
Carrier Detection Sensitivity
(High Sensitivity Mode)
2
mV
rms
µV
rms
V
rms
kΩ
mV
rms
µV
rms
dB/
µVrms
V
BU
Band in Use Detection Level
6/30
STMICROELECTRONICS [ STMICROELECTRONICS ]
