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參數(shù)資料
| 型號： | ADC1031 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Quadruple Bus Transceiver 16-SOIC 0 to 70 |
| 中文描述： | ADC1031/ADC1034/ADC1038 10位串行I /辦公自動化/ D的模擬多路復(fù)用器和跟蹤器/保持功能 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 349K |
| 代理商： | ADC1031 |
3.0 Analog Considerations
(Continued)
External Reference 2.5V Full Scale
TL/H/10556–20
Power Supply as Reference
TL/H/10556–21
Input Not Referred to GND
TL/H/10556–22
*
Current path must still exist from V
IN(
b
)
to
ground
FIGURE 3. Analog Input Options
3.3 REFERENCE AND INPUT
The two V
REF
inputs of the ADC1031/4/8 are fully differen-
tial and define the zero to full-scale input range of the A to D
converter. This allows the designer to easily vary the span
of the analog input since this range will be equivalent to the
voltage difference between V
REF
a
and V
REF
b
. By reduc-
ing V
REF
(V
REF
e
V
REF
a b
V
REF
b
) to less than 5V, the
sensitivity of the converter can be increased (i.e., if V
REF
e
2V then 1 LSB
e
1.95 mV). The input/reference arrange-
ment also facilitates ratiometric operation and in many
cases the chip power supply can be used for transducer
power as well as the V
REF
source.
This reference flexibility lets the input span not only be var-
ied but also offset from zero. The voltage at V
REF
b
sets the
input level which produces a digital output of all zeros.
Though V
IN
is not itself differential, the reference design
allows nearly differential-input capability for many measure-
ment applications. Figure 3 shows some of the configura-
tions that are possible.
The ADC1031 has no V
REF
b
pin. V
REF
b
is internally tied to
GND.
Power Supply Bypassing
TL/H/10556–23
TL/H/10556–24
12
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ADC1031BIN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| ADC10321CIVT | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADC10321CIVT/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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