STW5094AD 데이터 시트보기 (PDF) - STMicroelectronics
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STW5094AD
STMicroelectronics
STW5094AD Datasheet PDF : 52 Pages
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STw5094A
TYPICAL PERFORMANCE CHARACTERISTICS (cont.)
Digital Rx Voice Filter Characteristic (No High Pass Filt.)
1
0.5
0
-0.5
-1
0
500
Plot 7.
1000
1500 2000
Freq. [Hz]
2500
3000
3500
In band Frequency response. FS=8 kHz
High Pass filter disabled (HPB=1).
Dynamic Compressor Transfer Function
1
0.75
0.5
0.25
0
-0.25
-0.5
-0.75
-1
-1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 1
Input Amplitude [FS]
Plot 8.
Audio signal transfer function when the Dynamic
Compressor is active.
TYPICAL PERFORMANCE CHARACTERISTICS (Measures)
Signal to Noise ratio vs Signal Amplitude in Audio Mode
100
90
80
70
60
50
Audio DAC Performance at HPL with 1kΩ load to VCMHP
0
-20
-40
-60
-80
40
30
20
-70
-60
-50
-40
-30
-20
-10
0
Signal Amplitude [Hz]
Plot 9.
1 kHz Input signal applied at Au I ⁄ F input (L & R).
Left and right single ended drivers gain set to -6 dB.
VCC=2.7V, Fs=48kHz, 18 bits input word. A-weighted
-100
-120
0
5000
Plot 10.
10000
15000
Frequency [Hz]
20000
FFT audio mode (8192 points). 1kΩ load
Full scale 1kHz input signal applied at Au I ⁄ F input.
Both channels active, Left channel plotted
VCC=2.7V, Fs=48kHz, 18 bits input. 12MHz AMCK
Voice Mode SINAD: Receive (RX) and Transmit (TX) path
90
80
70
60
RX Path
TX Path
50
40
30
20
10
-70
-60
-50
-40
-30
-20
-10
0
Signal Amplitude [dB]
Plot 11.
1 kHz Signal applied at PCM (RX) or Mic1 (TX) input.
RX: 0 dB gain differential output (0dB=4Vpp out), 8Ω
load.
TX: 20 dB input gain (0dB=0.2Vpp input).
VCC=2.7V, Fs=8kHz, 300-3400 Hz Linear Weight.
FM mode Performance at HPL with 16Ω load to VCMHP
0
-20
-40
-60
-80
-100
-120
0
5000
10000
15000
20000
Frequency [Hz]
Plot 12.
FFT FM mode (8192 points). 16Ω load
1 kHz Signal applied at FM inputs
Both channels active and loaded, left channel plotted
VCC=2.7V, 12MHz AMCK
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