FEDL7020-02
1
Semiconductor
ML7020
AC Characteristics (Modem Section)
(VDD = 4.5 to 5.5 V, Ta = –40 to +85°C)
Parameter
Symbol
VAOM
Condition
Min.
–6.0
Typ.
–4.0
Max.
–2.0
Unit
Modem transmit level
LO–, LO+ Differential
dBm
Transmit signal level
relative value
VDM
(Mark signal) – (space signal)
–1.5
0
+1.5
dB
fM
fS
—
—
XD = 1
XD = 0
1292
2092
–51
—
1300
2100
—
1308
2108
–6
Hz
Hz
Transmit carrier
frequency
Receive signal level
VAI
VON
VOFF
Level of LI1O and LI2O
Level of LI1O and LI2O OFF → ON
1700 Hz ON → OFF
dBm
dBm
dBm
–44.5
–46.5
–42
—
Carrier detection level
–51
Carrier detection
hysteresis
vHYS
tCDD
tCDH
DBS
—
2
—
15
dB
ms
ms
%
Carrier detection delay
time
OFF → –30 dBm
–30 dBm → OFF
5
10
28
—
Carrier detection hold
time
23
34
Demodulation bias
distortion
1200 bps, 1:1 pattern
–10
+10
Note: RD is fixed at “1” when the carrier detector is OFF.
AC Characteristics (CLKO)
(VDD = 4.5 to 5.5 V, Ta = –40 to +85°C)
Parameter
Symbol
VCOH
Condition
Min.
Typ.
Max.
Unit
0.9 ×
VDD
—
VDD
V
Output amplitude
CL = 100 pF
0.1 ×
VDD
VCOL
0
—
V
11/19
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