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参数资料
| 型号： | TSA1005I-40IF |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | ADC |
| 英文描述： | 2-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48 |
| 封装： | 7 X 7 MM, TQFP-48 |
| 文件页数： | 9/22页 |
| 文件大小： | 540K |
| 代理商： | TSA1005I-40IF |
Obsolete
Product(s)
- Obsolete
Product(s)
TSA1005
17/22
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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 converter 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.
EVAL1005/BA evaluation board
The EVAL1005/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 input 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.
- SFSR=-1dB for dynamic parameters.
Figure 8: Analog to Digital Converter characterization bench
Mux
and
TX
Proces
RX
AD
TGC amplifier
HV TX amps
Sine Wave
Generator
HP8644
ADC
evaluation
Pulse
Logic
Sine Wave
Generator
HP8644
HP8133
Vin
Clk
Data
Clk
PC
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