FX828 Datasheet, PDF (28/34 Pages) CML Microcircuits – CTCSS/DCS/SELCALL Processor

CTCSS/DCS/SELCALL Processor
FX828
Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 4.032MHz
Audio Level 0dB ref = 308mVrms at 1kHz
V_DD = 3.3V 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 V_DD = 3.3V
I_DD (all powersaved)
2
-
0.5
1.0
mA
I_DD (FAST DETECT Enabled)
2
-
0.7
2.5
mA
I_DD (Rx Operating - DCS, FAST DETECT and
2
-
1.0
4.5
mA
CTCSS or Selcall)
I_DD (Tx Operating - DCS or Selcall or SUB
AUDIO)
2
-
0.7
3.0
mA
I_DD (Tx Operating - DCS and Selcall)
2
-
0.8
4.0
mA
At V_DD = 5V
I_DD (all powersaved)
2
-
1.0
1.5
mA
I_DD (FAST DETECT Enabled)
2
-
1.1
4.5
mA
I_DD (Rx Operating - DCS, FAST DETECT and
2
-
1.7
7.5
mA
CTCSS or Selcall)
I_DD (Tx Operating - DCS or Selcall or SUB
AUDIO)
2
-
1.2
6.0
mA
I_DD (Tx Operating - DCS and Selcall)
2
-
1.3
6.5
mA
"C-BUS" Interface
Input Logic "1"
Input Logic "0"
Input Leakage Current (Logic "1" or "0")
Input Capacitance
Output Logic "1" (I_OH = 120µA)
Output Logic "0" (I_OL = 360µA)
"Off" State Leakage Current (Vout = V_DD)
70%
-
-
V_DD
-
-
30%
V_DD
-1.0
-
1.0
µA
-
-
7.5
pF
90%
-
-
V_DD
-
-
10%
V_DD
6
-
-
10
µA
AC Parameters
TONE Decoder
Sensitivity
CTCSS
Response Time
De-response Time
Frequency Range
SELCALL
Response Time
De-response Time
Frequency Range
(Pure Tone)
5
-
-26.0
-
dB
(Composite Signal)
(Composite Signal)
-
140
-
ms
-
145
-
ms
60
-
253
Hz
(Good Signal)
(Good Signal)
-
14
-
ms
-
22
-
ms
625
-
3000
Hz
DCS Decoder
Bit-Rate Sync Time
Sensitivity
-
2
-
edges
1
58
-
116
mVp-p
© 2009 CML Microsystems Plc
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D/828/4