RALCWI Vocoder
CMX608/CMX618/CMX638
Notes
Min.
Typ.
Max.
Units
AC Parameters
XTALin
'High' pulse width
'Low' pulse width
4
4
15
15
–
–
–
–
ns
ns
Input impedance (at 12.0MHz)
Powered-up
Resistance
Capacitance
–
–
–
–
–
150
20
300
20
20
–
–
–
–
–
k
pF
k
pF
ms
Powered-down Resistance
Capacitance
Xtal start up time (from powersave)
BIAS (CMX618/CMX638 only)
Start up time (from powersave)
–
100
–
ms
CODEC (CMX618/CMX638 only)
Input Impedance (INPUT P or INPUT N)
Input Voltage Range (INPUT P or INPUT N)
Differential Input Voltage (pk to pk)
Output Load Impedance (OUT P or OUT N)
Output Voltage Range (OUT P or OUT N)
Differential Output Voltage (pk to pk)
Differential Output Power
–
–
–
32
–
–
–
–
–
10
–
–
–
–
–
20 to 80
100
k
%AVDD
%AVDD
11, 18
12, 13, 18
7
3, 14, 18
3, 12, 18
3
–
10 to 90 % VDDPA
160
–
–
% VDDPA
mW
dB
120
±0.5
±0.5
86
80
Input Gain Setting Accuracy
Output Gain Setting Accuracy
ADC SINAD
–
–
–
–
dB
dB
dB
5, 15
8, 16
–
–
DAC SINAD
Vocoder Performance
Sample Rate
Data Rate (with FEC)
Data Rate (without FEC)
Lower Frequency Limit (internally bandlimited)
Upper Frequency Limit (internally bandlimited)
Encoder Algorithmic Delay
Decoder Algorithmic Delay
–
–
2400
60
–
8
3600
–
–
2750
–
3900
20
12
ks/s
bps
bps
Hz
Hz
ms
ms
–
–
–
–
–
17
17
–
–
2014 CML Microsystems Plc
63
D/608_18_38/11
CMLMICRO [ CML MICROCIRCUITS ]
