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CS4298-KQ 데이터시트(PDF) 7 Page - Cirrus Logic |
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CS4298-KQ 데이터시트(HTML) 7 Page - Cirrus Logic |
7 / 52 page CS4298 DS315PP2 7 MODEM CHARACTERISTICS (Analog Transmitter Specifications: T ambient = 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) 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. Parameter Min Typical Max Units Modem Analog Transmitter Characteristics Resolution 20 bits Dynamic Range (Note 5) 100 dB FS Passband 20 5000 Hz Passband Ripple ±0.125 dB1K Total Harmonic Distortion 85 88 dB FS Full Scale Peak to Peak Output Voltage (TX+ to TX-) TBD 5.6 TBD Volts AC Output Impedance (TX+, TX-) (Note 5) 0.1 W Load Impedance (per pin) (Note 5) 250 W Power Supply Rejection (1kHz) (Note 5) 60 dB Output Current (per pin) 7.4 mA Offset (relative) (Note 5) 6 mV 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) -40 dB FS Total Out of Band energy (20 kHz - 1 MHz) (Note 5) -30 dBV Highest 9kHz band (noise + tone) power (90 kHz - 2 MHz) (Note 5, 6) -55 dBV Modem Analog Receiver Characteristics Resolution 18 bits Dynamic Range Gain = 0 90 dB FS Passband 20 5000 Hz Passband Ripple ±0.125 dB1K Total Harmonic Distortion Gain = 0 85 dB FS Total Absolute Gain Accuracy -5 +5 % Full Scale Peak to Peak Input Voltage (RX+ to RX-, differential) Gain = 0 2.8 Volts Input Impedance (per pin) (Note 5) 15 K Ω Offset (relative) (Note 5) 6 mV Power Supply Rejection (Note 5) 40 60 dB |
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