FX828 Datasheet, PDF (30/34 Pages) CML Microcircuits – CTCSS/DCS/SELCALL Processor

CTCSS/DCS/SELCALL Processor
FX828
Transmitter Modulator Drives:
Mod.1 Attenuator
Attenuation (at 0dB)
Cumulative Attenuation Error
(wrt attenuation at 0dB)
Output Impedance
Input Impedance (at 100Hz)
Mod.2 Attenuator
Attenuation (at 0dB)
Cumulative Attenuation Error
(wrt attenuation at 0dB)
Output Impedance
General Purpose Timer
Timing Period Range
Count Interval
Xtal/Clock Input
Pulse Width ('High' or 'Low')
Input Impedance (at 100Hz)
Gain (I/P = 1mVrms at 100Hz)
DAC
Range
Step Size
Step Accuracy
Input Impedance (COMPIN)
Output Impedance (COMPOUT)
Notes Min. Typ. Max.
Units
-0.3
0
0.2
dB
-1.0
-
1.0
dB
3
-
600
-
Ω
-
15.0
-
kΩ
-0.3
0
0.2
dB
-0.6
-
0.6
dB
3
-
600
-
Ω
1
-
255
ms
-
1
-
ms
4
40.0
-
-
ns
10.0
-
-
MΩ
20.0
-
-
dB
1 312.5 -
2500
mV
1
-
312.5
-
mV
1 -30.0
-
+30.0
mV
-
10
-
MΩ
-
1
-
kΩ
Notes:
1. At V_DD = 5.0V only. Signal levels or currents are proportional to V_DD.
2. At Tamb = 25°C, not including any current drawn from the device pins by external
circuitry.
3. Small signal impedance, at V_DD = 5.0V and Tamb = 25°C.
4. Timing for an external input to the XTAL/CLOCK pin.
5. With input gain components set as recommended in Figure 2.
6. IRQN pin.
7. From one tone to another tone.
8. See filter response (Figure 3).
9. Measured at MOD1 or MOD2 output.
10. SUBAUDIO, SELCALL and DCS.
© 2009 CML Microsystems Plc
30
D/828/4