CMX649E3 CML Microcircuits, CMX649E3 Datasheet - Page 48

• Manufacturer Part Number: CMX649E3
• Description: ADM Codec
• Manufacturer: CML Microcircuits

ADM Codec
7.1.3 Operating Characteristics
The following conditions are assumed unless otherwise specified: V
+85°C, Audio Test Frequency = 820Hz, Xtal/Clock f
level (0 dBm0) = 489mV
Notes:
DC Parameters
Input logic 1
Input logic 0
Output logic 1
Output logic 0
Digital Output Impedance
Analog Input Impedance
Analog Output Impedance
Three State Output Leakage
Insertion Loss
Dynamic Values
Encoder Analog Signal Input Levels
Decoder Analog Signal Output Levels
Encoder/Decoder (Full Codec)
2002 CML Microsystems Plc
I
I
I
I
Logic I/O Pin Input Impedance
Logic Input Pins, Pull-up Resistor
V
V
V
V
Decoder Passband (nominal)
Passband Lowest Corner Frequency
Passband Highest Corner Frequency
Stopband Lowest Corner Frequency
Stopband Highest Corner Frequency
Stopband Attenuation
Passband Gain
Passband Ripple
Output Noise (Input Short Circuit)
Perfect Idle Channel Noise (Encode Forced)
DD
DD
DD
DD
DD
DD
DD
DD
(powersaved) at V
(powersaved) at V
(not powersaved) at V
(not powersaved) at V
= 3.0V
= 5.0V
= 3.0V
= 5.0V
1. Not including any current drawn from the device by external circuits.
2. Input and output signal levels are independent of supply voltage.
3. Passband and stopband corner frequencies are programmable. Specified values are at
4. dBmOp units imply the use of a psophometrically weighted filter that is commonly used
nominal crystal frequencies of 4.096, 8.192, 12.288, or 16.384Mhz with the master clock
divider configured for a divide by 1, 2, 3, or 4 respectively. For other crystal frequencies
passband and stopband corner frequencies must be scaled accordingly.
in voice communication applications per ITU Recommendation G.223.
RMS
DD
DD
.
= 3.0V
= 5.0V
DD
DD
= 3.0V
= 5.0V
0
48
= 4.096MHz, Data Rate = 32kbps, Audio reference
Notes
1
1
1
1
2
2
2
2
3
3
3
3
4
4
80% V
70%V
2900
Min.
-1.0
300
1.0
-37
-37
-37
-37
6.0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
DD
DD
DD
= 2.7V to 5.5V at T
3300
Typ.
200
1.0
1.0
1.9
2.5
±4
40
–
–
–
–
–
–
–
–
0
–
–
–
–
–
–
–
–
0
–
–
–
30% V
20%V
14000
Max.
10.0
10.0
TBD
TBD
200
4.0
4.0
4.0
4.0
4.0
1.0
-69
-72
24
AMB
–
–
–
–
–
–
–
–
–
–
–
–
DD
DD
= -40 to
Units
µA
µA
mA
mA
V
V
V
V
M
k
k
k
µA
dB
dB
dB
dB
dB
Hz
Hz
Hz
kHz
kHz
dB
dB
dB
dBmOp
dBmOp
CMX649
D/649/1