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參數(shù)資料
| 型號(hào)： | TSA1204IFT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | ADC |
| 英文描述： | 2-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48 |
| 封裝： | 7 X 7 MM, PLASTIC, TQFP-48 |
| 文件頁數(shù)： | 7/21頁 |
| 文件大?。?/td> | 498K |
| 代理商： | TSA1204IFT |
TSA1204
15/21
Figure 7 : Medical imaging application
The transducer is a piezoelectric ceramic such as
zirconium titanate. The whole array can reach up
to 512 channels.
The TX beam former, amplified by the HV TX
amps, delivers up to 100V amplitude excitation
pulses with phase and amplitude shifts.
The mux and T/R switch is a two way input signal
transmitter/ output receiver.
To compensate for skin and tissues attenuation
effects, The Time Gain Compensation (TGC) am-
plifier is an exponential amplifier that enables the
amplification of low voltage signals to the ADC in-
put range. Differential output structure with low
noise and very high linearity are mandatory fac-
tors.
These applications need high speed, low power
and high performance ADCs. 10-12 bit
resolution is necessary to lower the quantification
noise. As multiple channels are used, a dual con-
verter is a must for room saving issues.
The input signal is in the range of 2 to 20MHz
(mainly 2 to 7MHz) and the application uses most-
ly a 4 over-sampling ratio for Spurious Free Dy-
namic Range (SFDR) optimization.
The next RX beam former and processing blocks
enable the analysis of the outputs channels ver-
sus the input beam.
EVAL1204/BA evaluation board
The EVAL1204/BA is a 4 layer board with high
decoupling and grounding level. The schematic of
the evaluation board is reported figure 11 and its
top overlay view figure 10. The characterization of
the board has been made with a fully ADC
devoted test bench as shown on Figure 8. The
analog signal must be filtered to be very pure.
The dataready signal is the acquisition clock of the
logic analyzer.
The ADC digital outputs are latched by the octal
buffers 74LCX573.
All characterization measurements have been
made with:
- SFSR=1dB for static parameters.
Figure 8 : Analog to Digital Converter characterization bench
Mux and
T/R
switches
TX
beam
former
Processing
and display
RX
beam
former
ADC
TGC amplifier
HV TX amps
Sine Wave
Generator
HP8644
ADC
evaluation
board
Pulse
Generator
Logic
Analyzer
Sine Wave
Generator
HP8644
HP8133
Vin
Clk
Data
Clk
PC
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參數(shù)描述 |
|---|---|
| TSA1204IFT-E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Dual channel 12-bit 20Msps 120mW A/D converter |
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| TSA14 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EURO TERMINAL BLOCKS |
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