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STW5094AD 数据表(PDF) 46 Page - STMicroelectronics

部件名 STW5094AD
功能描述  18-bit Low Power Asynchronous Stereo Audio DAC with Integrated Power Amplifiers and Voice Codec
PDF  51 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STW5094AD 数据表(HTML) 46 Page - STMicroelectronics

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TYPICAL PERFORMANCE CHARACTERISTICS (cont.)
TYPICAL PERFORMANCE CHARACTERISTICS (Measures)
Plot 7.
In band Frequency response. FS=8 kHz
High Pass filter disabled (HPB=1).
-1
-0.5
0
0.5
1
0
500
1000
1500
2000
2500
3000
3500
Freq. [Hz]
Digital Rx Voice Filter Characteristic (No High Pass Filt.)
Plot 8.
Audio signal transfer function when the Dynamic
Compressor is active.
-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]
Dynamic Compressor Transfer Function
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
20
30
40
50
60
70
80
90
100
-70
-60
-50
-40
-30
-20
-10
0
Signal Amplitude [Hz]
Signal to Noise ratio vs Signal Amplitude in Audio Mode
Plot 10.
FFT audio mode (8192 points). 1k
Ω 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
-120
-100
-80
-60
-40
-20
0
0
5000
10000
15000
20000
Frequency [Hz]
Audio DAC Performance at HPL with 1k
Ω load to VCMHP
Plot 12.
FFT FM mode (8192 points). 16
Ω load
1 kHz Signal applied at FM inputs
Both channels active and loaded, left channel plotted
VCC=2.7V, 12MHz AMCK
-120
-100
-80
-60
-40
-20
0
0
5000
10000
15000
20000
Frequency [Hz]
FM mode Performance at HPL with 16
Ωload to VCMHP
10
20
30
40
50
60
70
80
90
-70
-60
-50
-40
-30
-20
-10
0
Signal Amplitude [dB]
Voice Mode SINAD: Receive (RX) and Transmit (TX) path
Plot 11.
1 kHz Signal applied at PCM (RX) or Mic1 (TX) input.
RX: 0 dB gain differential output (0dB=4Vpp out), 8
Ω
load.
TX: 20 dB input gain (0dB=0.2Vpp input).
VCC=2.7V, Fs=8kHz, 300-3400 Hz Linear Weight.
RX Path
TX Path



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