CMX639 Ver la hoja de datos (PDF) - MX-COM Inc
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CMX639 Datasheet PDF : 12 Pages
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Consumer/Commercial CVSD Digital Voice CODEC
7
CMX639 Preliminary Information
5.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
VDD = 3.0V to 5.5V at TAMB = -40 to +85°C, Audio Test Frequency = 820Hz, Xtal/Clock f0 = 1.024MHz
Sample Clock Rate = 32kbps, Audio level 0dB ref (0 dBm0) = 489mVRMS.
Static Values
Supply Current (Enabled)
VDD = 3.0V
VDD = 5.0V
Supply Current (Powersave)
Input logic ‘1’
Input Logic ‘0’
Output Logic ‘1’
Output Logic ‘0’
Digital input Impedance
Logic I/O pins
Logic Input pins, Pull-up Resistor
Digital output impedance
Analog Input Impedance
Analog Output Impedance
Three State Output Leakage
Insertion Loss
Dynamic Values
Encoder
Analog signal Input levels
VDD = 3.0V
VDD = 5.0V
Principal Integrator Frequency
Encoder Passband
Compand Time Constant
Decoder
Analog Signal Output Levels
VDD = 3.0V
VDD = 5.0V
Decoder Passband
Encoder Decoder (Full Codec)
Passband
Stopband
Stopband Attenuation
Passband Gain
Passband Ripple
Output Noise (Input Short Circuit)
Perfect Idle Channel Noise
(Encode Forced)
Notes Min.
Typ.
Max.
Units
mA
6
1.90
mA
6
2.75
mA
6
600
µA
70% VDD
80% VDD
V
30% VDD
V
V
20% VDD
V
1
MΩ
1
300
kΩ
4
kΩ
2
100
kΩ
800
Ω
±4
µA
3
0
dB
7
-37
6
dB
7
-33
10
dB
160
Hz
4
3240
Hz
5
ms
7
7
-37
6
dB
7
-33
10
dB
4
3200
Hz
4
300
3400
Hz
6
10
KHz
60
dB
0
dB
-3
3
dB
8
-60
dBmOp
8, 9
-63
dBmOp
2000 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480209.006
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All Trademarks and service marks are held by their respective companies.
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