Cordless Telephone Scrambler
FX128
Operating Characteristics
For the following conditions unless otherwise specified:
V
DD
= 3.3V at Tamb = 25°C
Clock Frequency = 10.24MHz
Audio Level 0dB ref. at 1kHz = (V
DD
- 1) x 150vrms e.g. V
DD
= 3.3V 0dB = 345mVrms
Notes
Static Values
Supply Current
Input Impedance
Digital
Amplifiers
Output Impedance (RXOUT, TXOUT)
Input Logic ‘1’ Voltage
Input Logic ‘0’ Voltage
Dynamic Values
General
Analog Signal Input Levels
Analog Output Noise
Clear Mode
Passband -3dB Cutoff Frequencies
Low
High
Passband Ripple (300-3000Hz)
Rx Channel
Tx Channel
Passband Ripple (500-2750Hz)
Rx Channel
Tx Channel
Filter Attenuation at 3.3kHz
Rx and Tx Channel
Filter Attenuation at 3.6kHz
Rx and Tx Channel
Passband Gain (@ 1kHz ref.)
Rx and Tx Channel
Switched-Capacitor Filter Sampling
Carrier Frequency
-16.0
-
-
2.5
3
5.0
dB
mVrms
1
1
Min.
Typ.
Max.
Units
-
2.0
3.0
mA
2
2
100
1.0
-
70%
-
-
10.0
1.0
-
-
-
-
-
-
30%
kΩ
MΩ
kΩ
V
DD
V
DD
4
-
3000
-
-
300
-
Hz
Hz
0
0
-
-
3.6
2.9
dB
dB
0
0
-
-
2.2
2.0
dB
dB
-
30
-
dB
-
45
-
dB
-1.5
-
-
-
211.066
3298
0.5
-
-
dB
kHz
Hz
8
CMLMICRO [ CML MICROCIRCUITS ]
