Audio Band Scrambler
FX/MX128
Operating Characteristics
For the following conditions unless otherwise specified:
VDD = 3.3V at TAMB = 25°C
Clock Frequency = 10.24MHz
Audio Level 0dB ref. at 1kHz = (VDD-1) x 150mVRMS e.g. VDD = 3.3V 0dB = 345mVRMS.
Static Values
Supply Current
Notes Min. Typ. Max
—
2.0
3.0
Units
mA
Input Impedance
Digital
Amplifiers
2
100
—
—
kΩ
2
1.0
10.0
—
MΩ
Output Impedance (RXOUT, TXOUT)
—
1.0
—
kΩ
Input Logic 1 Voltage
Input Logic 0 Voltage
1
70%
—
—
VDD
1
—
—
30%
VDD
Dynamic Values
General
Analogue Signal Input Levels
Analogue Output Noise
-16.0
—
4
—
2.5
3
dB
5.0
mVRMS
Clear Mode
Passband -3dB Cutoff Frequencies
Low
High
—
—
300
Hz
3000
—
—
Hz
Passband Ripple (300-3000Hz)
Rx Channel
Tx Channel
0
—
3.6
dB
0
—
2.9
dB
Passband Ripple (500-2750Hz)
Rx Channel
Tx Channel
0
—
2.2
dB
0
—
2.0
dB
Filter Attenuation at 3.3 kHz
Rx and Tx Channel
—
30
—
dB
Filter Attenuation at 3.6 kHz
Rx and Tx Channel
—
45
—
dB
© 2003 CML Microsystems Plc
8
D/128/2