CS4298 Просмотр технического описания (PDF) - Cirrus Logic
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CS4298 Datasheet PDF : 52 Pages
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CS4298
MODEM CHARACTERISTICS (Analog Transmitter Specifications: Tambient = 0° to 70° C, AVdd = 5.0
V; Sample Frequency, Fs = 48 kHz; Audio specifications for 20Hz - 5 kHz, actual digital filter may cutoff at 20 kHz,
600 Ω differential load where applicable)
Parameter
Modem Analog Transmitter Characteristics
Resolution
Dynamic Range
(Note 5)
Passband
Passband Ripple
Total Harmonic Distortion
Full Scale Peak to Peak Output Voltage (TX+ to TX-)
AC Output Impedance (TX+, TX-)
(Note 5)
Load Impedance (per pin)
(Note 5)
Power Supply Rejection (1kHz)
(Note 5)
Output Current (per pin)
Offset (relative)
(Note 5)
Out of Band specifications (Tambient = 25° C, AVdd = 5 V;
Sample Frequency, Fs = 48 kHz; measurement bandwidth
20 kHz - 1MHz, RL=600 Ω, CL=33nF)
(Note 5)
Total Out of Band energy (20 kHz - 1 MHz)
(Note 5)
Highest 9kHz band (noise + tone) power (90 kHz - 2 MHz)
(Note 5, 6)
Modem Analog Receiver Characteristics
Resolution
Dynamic Range
Gain = 0
Passband
Passband Ripple
Total Harmonic Distortion
Gain = 0
Total Absolute Gain Accuracy
Full Scale Peak to Peak Input Voltage (RX+ to RX-,
differential)
Gain = 0
Input Impedance (per pin)
(Note 5)
Offset (relative)
(Note 5)
Power Supply Rejection
(Note 5)
Min
20
20
85
TBD
250
18
20
-5
40
Typical
100
88
5.6
0.1
60
7.4
6
Max
5000
±0.125
TBD
Units
bits
dB FS
Hz
dB1K
dB FS
Volts
W
W
dB
mA
mV
-40
dB FS
-30
dBV
-55
dBV
bits
90
dB FS
5000
Hz
±0.125
dB1K
85
dB FS
+5
%
2.8
Volts
15
KΩ
6
mV
60
dB
Notes: 6. This is the FCC specification for Out-of-Band energy at the telephone jack interface. 9 kHz refers to the
bin size of an FFT performed over the entire range. The amount of noise plus tone power in each 8kHz
bin must be less than -55dBV.
DS315PP2
7
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