GMSK Modem
CMX589A
6.1.3 Operating Characteristics
For the following conditions unless otherwise specified.
VDD = 5.0V @ TAMB = 25°C
Xtal/Clock Frequency = 4.096MHz, Data Rate = 8kbps, Noise Bandwidth = Bit Rate
Static Values
Supply Current
IDD (VDD = 3.0V)
Notes
Min.
Typ.
Max.
Units
Tx PS
Rx PS
1
1
0
1
0
1
1
0
0
-
-
-
-
0.5
1.0
1.0
1.5
-
-
-
-
mA
mA
mA
mA
IDD (VDD = 5.0V)
1
0
1
0
1
1
0
0
-
-
-
-
1.0
2.0
3.0
4.0
-
-
-
-
mA
mA
mA
mA
Input Logic Level
Logic 1 Input Level
Logic 0 Input Level
Logic Input Current
Output Logic Level
3.5
-
-
-
-
-
V
V
1.5
5.0
2
-5.0
mA
4.6
-
-
-
-
V
V
Logic 1 Output Level (IOH = 120mA)
Logic 0 Output Level (IOL = -120mA)
Transmit Parameters
0.4
-
Tx OUT pin DC bias shift caused by change from
Tx Enable = 0 to Tx Enable = 1 while
Tx PSAVE = 0 at 25°C
-85.0
-
85.0
mV
Tx OUT, Output Impedance
Tx Out, Level
3
-
1.0
1.0
-
-
kW
VP-P
V
4, 10
12
0.8
1.2
Output DC Offset
Tx Data Delay
-0.125
0.125
BT = 0.3
5
5
6
-
-
-
2.0
1.5
4.0
2.5
2.0
-
bit-
periods
BT = 0.5
bit-
periods
Tx PS to Output-Stable time
bit-
periods
Receive Parameters
Rx Amplifier
Input Impedance
Output Impedance
Voltage Gain
1.0
-
-
-
MW
KW
dB
7
-
-
10.0
50.0
1.0
-
-
Rx Filter Signal Input Level
Rx Time Delay
8, 10
9
0.7
-
1.3
3.0
VP-P
bit-
periods
ã 2002 CML Microsystems Plc
20
D/589A/4
CMLMICRO [ CML MICROCIRCUITS ]
