SM8223A Datasheet, PDF (5/15 Pages) Nippon Precision Circuits Inc – FSK Decoder and DTMF Receiver IC

SM8223A
AC Electrical Characteristics
FSK decoder
V_DD = 3.0V ± 0.3V, GND = 0V, f_CLK = 3.579545MHz, T_a = −20 to 85°C unless otherwise noted.
Parameter
Detection sensitivity
Noise reduction ratio
Symbol
Condition
Rating
Unit
min
typ
max
Typical application circuit
−4 0
−3 7 . 5
0
dBm
M a r k signal and SPA CE
signal are same level.
Noise: Random noise from
20
–
200Hz to 3400Hz.
–
dB
DTMF receiver
V_DD = 3.0V ± 0.3V, GND = 0V, f_CLK = 3.579545MHz, T_a = −20 to 85°C unless otherwise noted.
Parameter
Detection frequency deviation
Non-detection frequency deviation
Detection sensitivity
Non-detection sensitivity
Signal level error
High-frequency rejection ratio
Noise rejection ratio
Dial tone rejection ratio
1. Input signal is up to V _{D D} level.
Symbol
Condition
Rating
Unit
min
typ
max
±1.5% ± 2
–
–
Hz
±3.5
–
Typical application circuit
−3 2 . 0
–
–
%
0.0
dBm
–
–
−5 0 . 0
dBm
–
–
6
dB
–
18
–
dB
Typical application circuit¹
–
12
–
dB
–
20
–
dB
Input-stage amplifier Characteristics
V_DD = 3.0V ± 0.3V, GND = 0V, f_CLK = 3.579545MHz, T_a = −20 to 85°C unless otherwise noted.
Parameter
Input leakage current
Input resistance
DC open-loop voltage gain
Unity gain frequency
Load capacitance
Load resistance
Symbol
I_IN
R _IN
A_VOL
f_C
C_L
R_L
Condition
Rating
Unit
min
typ
max
–
–
1
µA
–
1
–
MΩ
30
–
–
dB
80
–
–
kHz
–
–
100
pF
50
–
–
kΩ
NIPPON PRECISION CIRCUITS—5