73M2901CE Datasheet, PDF (10/22 Pages) Teridian Semiconductor Corporation – Single Chip Modem

73M2901CE Data Sheet
DS_2901CE_031
4.4 Transmitter
Parameter
ITU Guard tone power
Calling Tone
Answer Tone power
DTMF Transmit power
Gain adjust tolerance
Total Harmonic Distortion
(THD)
Intermod Distortion
Power supply rejection
ratio
Conditions
550 Hz (relative to carrier)
1800 Hz (relative to carrier)
1300 Hz
2225 Hz / 2100 Hz
High band tones
Low band tones
By step
1 kHz sine wave at output
(TXAP-TXAN)
1.5 Vpk (2.7 dBm) for
VREF=1.25 V
THD=2^nd and 3^rd harmonic
At output (TXAP-TXAN)
1 kHz, 1.2 kHz sine waves
summed
2 Vpk for VREF=1.25 V
-30 dBm signal at VPA
300 Hz to 30 kHz
measured TXAP to TXAN
Min
-5
-8
-11
-11
-12
-13.7
-0.3
Nominal
-3.5
-6.5
-10
-10
-11.5
-13.2
0
Each unwanted
frequency component
Sum of unwanted
frequency components
in pass band
Max
-2
-5
-9
-9
-11
-12.7
0.3
-50
-33
-20
30
4.5 Maximum Transmit Level
Parameter
QAM
DPSK
FSK
DTMF (High Tone)
DTMF (Low Tone)
Conditions
VREF=1.25 V
VPA=3.3 V
VREF=1.25 V
VPA=3.3 V
VREF=1.25 V
VPA=3.3 V
VREF=1.25 V
VPA=3.3 V
VREF=1.25V
VPA=3.3V
S13=$20,
S85=80
S13=$20,
S85=80
Min Nominal Max
-9.6
-7.4
-5.3
-8
-7
-9.7
-8.7
Units
dB
dB
dBm0¹
dBm0¹
dBm0¹
dBm0¹
dBm0¹
dB
dBm
dB
below
low tone
dB
Units
dBm0¹
dBm0¹
dBm0¹
dBm0¹
dBm0¹
1 _{dBm0 refers to the Teridian recommended line interface (8 dB loss from transmit pins to the line and 5 dB loss from}
the line to the receiver pin). Results may vary depending on the selected DAA components. 0dBm=0.775 mV_rms;
dBm=10log(V_rms2/(1mW)(600Ω))
10
Rev. 3.3