SM8224C
AC Electrical Characteristics
Measurement conditions: R1 = 430kΩ, R2 = 34kΩ, R3 = 390kΩ, C1= 0.22µF
FSK decoder
V
= 2.7 to 5.5V, GND = 0V, f
= 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
DD
CLK
Rating
Parameter
Symbol
Condition
Unit
min
typ
−43
max
Input sensitivity
–
CD
dBm
dB
ON
1
S/N ratio
FSKSNR
20
–
–
–
−37.78
–
Carrier detection sensitivity
Carrier non-detection sensitivity
Oscillator frequency
CD
CD
−43
dBm
dBm
MHz
ON
−50
−46
OFF
f
typ − 0.1%
3.579545
typ + 0.1%
CLK
1. Mark signal and SPACE signal are same level.
Noise: Random noise from 200Hz to 3400Hz.
Dual tone detector
V
= 2.7 to 5.5V, GND = 0V, f
= 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
DD
CLK
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
Frequency (low frequency)
Frequency (high frequency)
Detection frequency deviation
Non-detection frequency deviation
Detection sensitivity
f
–
2130
–
Hz
Hz
L
f
–
1.1
3.5
−37.78
–
2750
–
H
–
–
–
–
–
–
%
–
%
–
−43.78
6
dBm
dBm
dB
Non-detection sensitivity
Signal level deviation
–
Note: (S0, S1, MODE) = (V , 0V, 0V)
DD
Input-stage amplifier Characteristics
V
= 2.7 to 5.5V, GND = 0V, f
= 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
DD
CLK
Rating
Parameter
Symbol
Condition
Unit
min
–
typ
–
max
1
Input leakage current
DC open-loop voltage gain
Unity gain frequency
Load capacitance
I
ꢀA
dB
IN
G
f
30
80
–
–
–
OL
C
–
–
kHz
pF
C
–
100
–
L
L
Load resistance
R
50
–
kΩ
SEIKO NPC CORPORATION —6
NPC [ NIPPON PRECISION CIRCUITS INC ]
