CMX808AP4 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX808AP4' PDF : 23 Pages View PDF
Family Radio CTCSS 'Type 2' Encoder and Decoder
CMX808A
1.7.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 4.0MHz
Audio Level 0dB ref. = 308mVrms at 1kHz
VDD = 3.0V to 5.0V, Tamb = -40°C to +85°C.
Composite Signal = 308mVrms at 1kHz + 75mVrms Noise + 31mVrms Sub-Audio Signal
Noise Bandwidth = 5kHz Band Limited Gaussian
Notes Min. Typ. Max.
Units
DC Parameters
At VDD = 3.0V
IDD (powersaved)
IDD (Encoder or Decoder only Operating)
2
-
0.2
0.3
mA
2
-
1.3
2.0
mA
At VDD = 5.0V
IDD (powersaved)
IDD (Encoder or Decoder only Operating)
2
-
0.5
0.8
mA
2
-
3.2
4.8
mA
"C-BUS" Interface
Input Logic "1"
Input Logic "0"
Input Leakage Current (Logic "1" or "0")
Input Capacitance
Output Logic "1" (IOH = 120µA)
Output Logic "0" (IOL = 360µA)
"Off" State Leakage Current (Vout = VDD)
70%
-
-
-
-1.0
-
-
-
90%
-
-
-
3
-
-
-
30%
1.0
7.5
-
10%
10.0
VDD
VDD
µA
pF
VDD
VDD
µA
AC Parameters
CTCSS Decoder
Sensitivity
Response Time
De-Response Time
Frequency Range
(Pure CTCSS Tone)
5
- -26.0
-
dB
(Composite Signal)
-
140
-
ms
(Composite Signal)
-
145
-
ms
60.0
-
251
Hz
CTCSS Encoder
Frequency Range
Tone Frequency Resolution
Tone Amplitude Tolerance
Total Harmonic Distortion
60.0
-
251
Hz
-
-
0.3
%
1 -1.0
0
+1.0
dB
-
3.0
-
%
Audio Band-Pass Filter
Passband
Passband Gain (at 1.0kHz)
Passband Ripple (w.r.t. gain at 1.0kHz)
Stopband Attenuation
Residual Hum and Noise
Alias Frequency
6 350
-
3000
Hz
6
-
0
-
dB
6 -2.0
-
+0.5
dB
6 30.0
-
-
dB
- -50.0
-
dBp
-
62.5
-
kHz
Audio Attenuator
Nominal Adjustment Range
Attenuation Accuracy
Step Size
0
-
48
dB
-1.5
-
1.5
dB
-
1.6
-
dB
2003 CML Microsystems Plc
18
D/808A/6
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