FX829 Datasheet, PDF (26/34 Pages) CML Microcircuits – Baseband Signal Processor

Baseband Signal Processor
Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 4.032MHz, Bit Rate = 1.2k bits/sec, Noise Bandwidth = Bit Rate,
Audio Level 0dB ref = 308mVrms at 1kHz
V_DD = 3.3V to 5.0V, Tamb = -40°C to +85°C.
Notes Min. Typ.
Max.
DC Parameters
I_DD (Powersaved)
I_DD (Tx or Rx Voice)
I_DD (Powersaved)
I_DD (Tx or Rx Voice)
(V_DD = 5.0V)
(V_DD = 5.0V)
(V_DD = 3.3V)
(V_DD = 3.3V)
"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)
AC Parameters
Input Sensitivity (for 0dB output)
Tx Audio Input (MIC)
Rx Audio Input (DEMODFB)
2
-
0.6
2
-
5.0
2
-
0.3
2
-
2.7
70%
-
-
-
-1.0
-
-
-
90%
9
-
-
8
-
308
8
-
308
1.5
8.0
1.0
4.0
-
30%
1.0
7.5
10%
10
-
-
Output Drive Level
For 60% Deviation
For 100% Deviation
1, 6, 8 291
308
326
1, 6, 7, 8 -
1440
-
Audio Filters
Gain at 1kHz
Passband Ripple
SINAD
Signal Path Noise
5
-
0
-
5
-2.0
-
0.5
5, 14
-
59
-
5
-
-55
-
Narrrow Audio Bandwidth Setting
Passband Frequencies
5
300
-
Stopband Attenuation:
(f = 100Hz)
5
-
3.0
(f = 3400Hz)
5
-
5.5
(f = 6000Hz)
5
10.5
24
(f = 12500Hz)
5
25
49
2550
-
-
-
-
Wide Audio Bandwidth Setting
Passband Frequencies
5
300
-
Stopband Attenuation:
(f = 100Hz)
5
-
3.0
(f = 3400Hz)
5
-
3.0
(f = 6000Hz)
5
10.5
19
(f = 25000Hz)
5
39.5
68
3000
-
-
-
-
FX829
Units
mA
mA
mA
mA
V_DD
V_DD
µA
pF
V_DD
V_DD
µA
mVrms
mVrms
mVrms
mVpk-pk
dB
dB
dBp
dB
Hz
dB
dB
dB
dB
Hz
dB
dB
dB
dB
© 1997 Consumer Microcircuits Limited
26
D/829/4