73M1903C-IM/F Maxim Integrated Products, 73M1903C-IM/F Datasheet - Page 33

• Manufacturer Part Number: 73M1903C-IM/F
• Description: IC MODEM AFE MULTIREGIONAL 32QFN
• Manufacturer: Maxim Integrated Products

Specifications of 73M1903C-IM/F

• Number Of Channels: 2
• Voltage - Supply, Analog: 3 V ~ 3.6 V
• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Package / Case: 32-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Number Of Bits: -

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
DS_1903C_033
9 Analog Specifications
9.1
VREF is not brought out to a pin on the 73M1903C. This specification is for information only. The VREF
voltage may be measured as the quiescent DC level at the transmit pins.
9.2
Table 17 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 DTMFBST (+0.83 dB) for the combined total gain of 2.33 dB.
These can be used where higher-level DTMF tones are required.
Rev. 5.0
DC Specifications
AC Specifications
VREF
VREF Noise
VREF PSRR
Parameter
Differential Line
Level (dB m0)
Maximum
-12.0
VDD= 3.0V - 3.6V.
300Hz-3.3 kHz
300Hz-30 kHz
-7.3
-5.1
-3.0
-7.8
-9.8
Table 16: Reference Voltage Specifications
Test Condition
Table 17: Maximum Transmit Levels
Ended Level at TXA
Maximum Single-
Pins (dB m)
-11.0
-6.3
-4.1
-2.0
-6.8
-8.8
rms Ratio
Peak to
Min
40*
2.31
1.81
1.41
1.41
1.41
4
Nom
1.36
-86
rms Voltage at
Single-Ended
TXA Pins (V)
0.2175
0.377
0.481
0.617
0.354
0.283
Max
-80
73M1903C Data Sheet
dBm
Units
Peak Voltage at
dB
Single-Ended
V
TXA Pins (V)
600
0.500
0.400
0.87
0.87
0.87
0.87
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