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參數(shù)資料
| 型號(hào)： | TSA1002CFT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | ADC |
| 英文描述： | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48 |
| 封裝： | 7 X 7 MM, PLASTIC, TQFP-48 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 236K |
| 代理商： | TSA1002CFT |
Obsolete
Product(s)
- Obsolete
Product(s)
TSA1002
15/20
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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 fig-
ure 8, INCM is set to the 1V DC analog input while
VREFM is connected to ground and VREFP let in-
ternal; we achieve a 2Vpp differential amplitude.
Figure 9 describes a configuration for a 1Vpp
analog signal with a 0.5V DC input. In this case,
while VREFP is kept internally at 1V, VREFM is
connected to VINB and INCM externally to 0.5V;
the dynamic is then 1Vpp (VREFP-VREFM=0.5V).
Figure 8 : DC-coupled 2Vpp analog input
Figure 9 : DC-coupled 1Vpp analog input
Dynamic characteristics, while not being as
remarkable as for differential configuration, are
still of very good quality. Measurements done at
50Msps, 2MHz input frequency, -1dBFS input
level sum up these performances. An SFDR of
-64.5dBc, a SNR of 57.8dB and an ENOB Full
Scale of 9.3bits are achieved.
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
VINB
50
10nF
Signal source
TSA1002
VIN
VINB
INCM
33pF
100k
100k
common
mode
TSA1002
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
TSA1002
VIN
VINB
INCM
VREFM
VREFP-VREFM = 0.5 V
0.5V power supply
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