参数资料
型号: 73M1903-IVT/F
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PDSO20
封装: ROHS COMPLIANT, MO-153AC, TSSOP-20
文件页数: 22/47页
文件大小: 541K
代理商: 73M1903-IVT/F
DS_1903_032
73M1903 Data Sheet
Rev. 2.1
29
8.4
Analog Specifications
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.
Table 15: Reference Voltage Specifications
Parameter
Test Condition
Min
Nom
Max
Units
VREF
VDD= 3.0 V - 3.6 V.
1.36
V
VREF Noise
300Hz-3.3 kHz
-86
-80
dBm600
VREF PSRR
300Hz-30 kHz
40*
dB
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.
These can be used where higher-level DTMF tones are required.
Table 16: Maximum Transmit Levels
Transmit Type
Maximum Different
Line Level (dBm0)
Maximum Single-
Ended Level at
TXA Pins (dBm)
Peak to
rms Ratio
Single-Ended
rms Voltage at
TXA Pins (V)
Single-Ended
Peak Voltage
at TXA Pins (v)
VPA=2.7 V to 3.6 V. All rms and peak voltages are relative to VREF.
V.90
-12.0
-11.0
4
0.2175
0.87
QAM
-7.3
-6.3
2.31
0.377
0.87
DPSK
-5.1
-4.1
1.81
0.481
0.87
FSK
-3.0
-2.0
1.41
0.616
0.87
DTMF (high tone)
-7.8
-6.8
1.41
0.354
0.500
DTMF (low tone)
-9.8
-8.8
1.41
0.283
0.400
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