Datasheet

Electrical characteristics ST7540
12/44
HD2
PA _O U T
Second harmonic
distortion on PA_OUT
V
PA_O UT
= 5.6V
PP
,
V
CC
= 12V
R
LOAD
= 30
Carrier frequency:
86KHz
Figure 3
-63
dB
c
HD3
PA _O U T
Third harmonic
distortion on PA_OUT
pin
V
PA_O UT
= 5.6V
PP
,
V
CC
= 12V
R
LOAD
= 30
Carrier frequency:
86KHz
Figure 3
- 63
dB
c
Receiver
V
IN
Input sensitivity
(Normal Mode)
0.5 2
mV
rms
Input sensitivity
(High Sens.)
250
µV
rms
Input sensitivity (TxD
line forced to “1”)
V
BU
dB/
µVrms
V
IN
Maximum input signal 2
V
rms
R
IN
Input impedance 80 100 140 k
V
CD
Carrier detection
sensitivity
(Normal Mode)
0.5 2
mV
rms
Carrier detection
sensitivity
(High Sensitivity Mode)
250
µV
rms
Carrier detection
sensitivity
(TxD forced to “1”)
V
BU
dB/
µVrms
V
BU
Band in Use Detection
Level
83.5 86
dB/
µVrms
Table 5. Electrical characteristics (continued)
(
V
DD
= +5V,
V
CC
=+9 V,
V
SS
= S
V
SS
= GND = 0V,-40°C
T
A
85°C, T
J
< 125°C,
unless otherwise specified)
Symbol Parameter Test condition Min. Typ. Max. Unit