73M1903-IVT/F Maxim Integrated Products, 73M1903-IVT/F Datasheet - Page 29

• Manufacturer Part Number: 73M1903-IVT/F
• Description: IC MODEM AFE V.22BIS 20-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of 73M1903-IVT/F

• Number Of Channels: 2
• Voltage - Supply, Analog: 3 V ~ 3.6 V
• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Number Of Bits: -

8.4
These can be used where higher-level DTMF tones are required.
DS_1903_032
8.4.1 DC Specifications
VREF should be connected to an external bypass capacitor with a minimum value of 0.1 μF. This pin is
not intended for any other external use.
8.4.2 AC Specifications
Table 16 shows the maximum transmit levels that the output drivers can deliver before distortion through
the DAA starts to become significant. The loss though the DAA transmit path is assumed to be 7 dB.
The signals presented at TXAP and TXAN are symmetrical. The transmit levels can be increased by
setting either TXBST0 (+1.5 dB) or/and TXBST1 (+0.83 dB) for the combined total gain of 2.33 dB.
Rev. 2.1
VPA=2.7 V to 3.6 V. All rms and peak voltages are relative to VREF.
V.90
QAM
DPSK
FSK
DTMF (high tone)
DTMF (low tone)
Transmit Type
Analog Specifications
VREF
VREF Noise
VREF PSRR
Parameter
VDD= 3.0 V - 3.6 V.
300Hz-3.3 kHz
300Hz-30 kHz
-12.0
Maximum Different
Line Level (dBm0)
Table 15: Reference Voltage Specifications
-7.3
-5.1
-3.0
-7.8
-9.8
Test Condition
Table 16: Maximum Transmit Levels
Maximum Single-
TXA Pins (dBm)
Ended Level at
-11.0
-6.3
-4.1
-2.0
-6.8
-8.8
4
Min
40*
rms Ratio
Peak to
2.31
1.81
1.41
1.41
1.41
1.36
Nom
-86
rms Voltage at
Single-Ended
TXA Pins (V)
0.2175
0.377
0.481
0.616
0.354
0.283
Max
-80
73M1903 Data Sheet
dBm
Units
at TXA Pins (v)
Single-Ended
Peak Voltage
dB
V
600
0.500
0.400
0.87
0.87
0.87
0.87
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