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參數資料
| 型號： | TSA1005-40IF |
| 元件分類： | ADC |
| 英文描述： | Analog to Digital Converter |
| 中文描述： | 模數轉換器 |
| 文件頁數： | 11/19頁 |
| 文件大小： | 194K |
| 代理商： | TSA1005-40IF |
TSA1005-40
11/19
External reference and common mode
Each of the voltages VREFP and INCM can be
fixed externally to better fit to the application
needs
(Refer
to
CONDITIONS’ page 4 for min/max values).
table
’OPERATING
The VREFP, VREFM voltages set the analog
dynamic at the input of the converter that has a full
scale amplitude of 2*(VREFP-VREFM). Using
internal references, the dynamic range is 1.8V.
The INCM is the mid voltage of the analog input
signal.
It is possible to use an external reference voltage
device for specific applications requiring even
better
linearity,
accuracy
temperature behavior.
Using
the
STMicroelectronics
TS4041-1.2 Vref leads to optimum performances
when configured as shown on Figure 2 .
or
enhanced
TS821
or
Figure 2 :
External reference setting
DRIVING THE ANALOG INPUT
Differential inputs
The TSA1005-40 has been designed to obtain
optimum performances when being differentially
driven. An RF transformer is a good way to
achieve such performances.
Figure 3 describes the schematics. The input
signal is fed to the primary of the transformer,
while the secondary drives both ADC inputs. The
common mode voltage of the ADC (INCM) is
connected to the center-tap of the secondary of
the transformer in order to bias the input signal
around this common voltage, internally set to
0.46V. It determines the DC component of the
analog signal. As being an high impedance input,
it acts as an I/O and can be externally driven to
adjust
this
DC
component.
decoupled to maintain a low noise level on this
node. Our evaluation board is mounted with a 1:1
ADT1-1WT transformer from Minicircuits. You
The
INCM
is
might also use a higher impedance ratio (1:2 or
1:4) to reduce the driving requirement on the
analog signal source.
Each analog input can drive a 1Vpp amplitude in-
put signal, so the resultant differential amplitude is
2Vpp.
Figure 3 :
Differential input configuration with
transformer
Figure 4 represents the biasing of a differential
input signal in
AC-coupled differential input
configuration. Both inputs VIN and VINB are
centered around the common mode voltage, that
can be let internal or fixed externally.
Figure 4 :
AC-coupled differential input
Figure 5 shows a DC-coupled configuration with
forced VREFP and INCM to the 1V DC analog
input while VREFM is connected to ground; we
achieve a 2Vpp differential amplitude.
Figure 5 :
DC-coupled 2Vpp differential analog
input
1k
TSA1005
VINB
VIN
VREFM
VREFP
external
reference
VCCA
330pF
4.7uF
10nF
TS821
TS4041
TSA1005
I or Q ch.
VIN
VINB
INCM
50
33pF
330pF
470nF
10nF
Analog source
1:1
ADT1-1
50
10nF
TSA1005
VIN
VINB
INCM
33pF
100k
100k
50
10nF
common
mode
TSA1005
VINB
VIN
INCM
330pF
4.7uF
10nF
analog
DC
AC+DC
VREFP
VREFM
VREFP-VREFM = 1 V
DC
analog
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TSA1005-40IFT | 功能描述:模數轉換器 - ADC DUAL CHANNEL 10 BIT 20/40MSPS A/D CONVTR RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TSA1005I-40IF | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DUAL-CHANNEL, 10-BIT, 20/40MSPS A/D CONVERTER |
| TSA1015 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PNP SILICON TRANSISTOR |
| TSA1036 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:General Purpose PNP Transistor |
| TSA1036CX | 功能描述:兩極晶體管 - BJT PNP Transistor RoHS:否 制造商:STMicroelectronics 配置: 晶體管極性:PNP 集電極—基極電壓 VCBO: 集電極—發射極最大電壓 VCEO:- 40 V 發射極 - 基極電壓 VEBO:- 6 V 集電極—射極飽和電壓: 最大直流電集電極電流: 增益帶寬產品fT: 直流集電極/Base Gain hfe Min:100 A 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PowerFLAT 2 x 2 |
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