SM8224B
AC Electrical Characteristics
Measurement conditions: R1 = 430k
Ω
, R2 = 34k
Ω
, R3 = 390k
Ω
, C1= 0.22
µ
F
FSK decoder
V
DD
= 5.0V ± 0.5V, GND = 0V, f
CLK
= 3.579545MHz, T
a
=
−
20 to 85
°
C unless otherwise noted.
Rating
P arameter
Input sensitivity
S/N ratio
1
Carrier detection sensitivity
Carrier non-detection sensitivity
Oscillator frequency
FSKSNR
CD
ON
C D
OFF
f
C L K
Symbol
Condition
min
–
20
–
−
50
typ
−
0.1%
typ
−
43
–
−
43
−
46
3.579545
max
CD
ON
–
−
37.78
–
typ + 0.1%
dBm
dB
dBm
dBm
MHz
Unit
1. M a r k signal and SPA CE signal are same level.
Noise: Random noise from 200Hz to 3400Hz.
Dual tone detector
V
DD
= 5.0V ± 0.5V, GND = 0V, f
CLK
= 3.579545MHz, T
a
=
−
20 to 85
°
C unless otherwise noted.
Rating
P arameter
Frequency (low frequency)
Frequency (high frequency)
Detection frequency deviation
Non-detection frequency deviation
Detection sensitivity
Non-detection sensitivity
Signal level deviation
Note: (S0, S1, MODE) = (V
D D
, 0V, 0V)
Symbol
f
L
f
H
Condition
min
–
–
1.1
3.5
−
37.78
–
–
typ
2130
2750
–
–
–
–
–
max
–
–
–
–
–
−
43.78
6
Hz
Hz
%
%
dBm
dBm
dB
Unit
Input-stage amplifier Characteristics
V
DD
= 5.0V ± 0.5V, GND = 0V, f
CLK
= 3.579545MHz, T
a
=
−
20 to 85
°
C unless otherwise noted.
Rating
P arameter
Input leakage current
DC open-loop voltage gain
Unity gain frequency
Load capacitance
Load resistance
Symbol
I
IN
G
OL
f
C
C
L
R
L
Condition
min
–
30
80
–
50
typ
–
–
–
–
–
max
1
–
–
100
–
µA
dB
kHz
pF
k
Ω
Unit
NIPPON PRECISION CIRCUITS—6
NPC [ NIPPON PRECISION CIRCUITS INC ]
