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參數資料
| 型號： | TSA0801CFT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | ADC |
| 英文描述： | 1-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48 |
| 封裝： | 7 X 7 MM, PLASTIC, TQFP-48 |
| 文件頁數： | 8/21頁 |
| 文件大?。?/td> | 0K |
| 代理商： | TSA0801CFT |
TSA0801
16/21
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Figure 6 : Input dynamic range for the various configurations
The applications requiring single-ended inputs
can be configured like reported on Figure 7 for an
AC-coupled input or on Figure 8 and 9 for a
DC-coupled input.
In the case of AC-coupled analog input, the
analog inputs VIN and VINB are biased to the
same voltage that is the common mode voltage of
the circuit (INCM). The INCM and reference
voltages may remain at their internal level but can
also be fixed externally.
Figure 7 : AC-coupled Single-ended input
In the case of DC-coupled analog input with 1V
DC signal, the DC component of the analog input
set the common mode voltage. As an example
figure 8, INCM is set to the 1V DC analog input
while VREFM is connected to ground and VREFP
is let internal (1V); we achieve a 2Vpp differential
amplitude.
Figure 8 : DC-coupled 2Vpp analog input
Figure 9 describes a configuration for a 1Vpp ana-
log signal with a 0.5V DC input. In this case, while
VREFP is kept internally at 1V, VREFM is con-
nected to VINB and INCM externally to 0.5V; the
dynamic is then 1Vpp (VREFP-VREFM=0.5V).
Figure 9 : DC-coupled 1Vpp analog input
INCM
+FS: code 1023
VIN
VINB
0: code 511
-FS: code 0
Differential configuration
Single-ended configuration:
balanced inputs
Single-ended configuration:
unbalanced inputs
INCM
+FS: code 1023
-FS: code 0
0: code 511
INCM
VIN
+FS + offset: code > 1023
-FS + offset: code > 0
VIN
VINB
INCM
VIN
VINB
INCM
VIN
VINB
INCM
VIN
Wrong configuration!
Ao + ac
Ao
Ao + ac
Ao
Ao + ac
VIN - VINB
50
10nF
Signal source
TSA0801
VIN
VINB
INCM
33pF
100k
100k
common
mode
TSA0801
VIN
VINB
INCM
330pF
4.7uF
10nF
Analog
DC
AC+DC
VREFP
VREFM
VREFP-VREFM = 1 V
330pF
4.7uF
10nF
Analog
DC
AC+DC
TSA0801
VIN
VINB
INCM
VREFM
VREFP-VREFM = 0.5 V
0.5V power supply
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