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參數(shù)資料
| 型號： | ADS7861EB |
| 英文描述： | CMOS 4-Bit-by-16-Word FIFO Register 16-PDIP -55 to 125 |
| 中文描述： | 雙通道，為500kHz，12位，2通道，同步采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大小： | 226K |
| 代理商： | ADS7861EB |
9
ADS7861
FIGURE 3. Single-Ended Input: Common-Mode Voltage
Range vs V
REF
.
1.0
1.5
1.2
2.0
2.5
2.6
3.0
V
REF
(V)
C
–1
0
1
2
3
4
5
2.7
2.3
4.1
0.9
V
CC
= 5V
Single-Ended Input
Differential Input
1.0
1.5
1.2
2.0
2.5
2.6
3.0
V
REF
(V)
C
–1
0
1
2
3
4
5
4.7
0.3
V
CC
= 5V
4.05
0.90
FIGURE 2. Using the ADS7861 in the Single-Ended and Differential Input Modes.
FIGURE 4. Differential Input: Common-Mode Voltage
Range vs V
REF
.
In each case, care should be taken to ensure that the output
impedance of the sources driving the +IN and –IN inputs are
matched. Otherwise, this may result in offset error, gain
error and linearity error which will change with both tem-
perature and input voltage.
The input current on the analog inputs depend on a number
of factors: sample rate, input voltage, and source impedance.
Essentially, the current into the ADS7861 charges the inter-
nal capacitor array during the sampling period. After this
capacitance has been fully charged, there is no further input
current. The source of the analog input voltage must be able
to charge the input capacitance (15pF) to a 12-bit settling
level within 2 clock cycles. When the converter goes into the
hold mode, the input impedance is greater than 1G
.
Care must be taken regarding the absolute analog input
voltage. The +IN input should always remain within the
range of GND – 300mV to V
DD
+ 0.3V.
CM
+V
REF
+V
REF
–V
REF
Single-Ended Inputs
t
+IN
CM
Voltage
CM
–V
REF
CM
+1/2V
REF
Differential Inputs
NOTES: Common-Mode Voltage (Differential Mode) = (IN+) + (IN–)
2
The maximum differential voltage between +IN and –IN of the ADS7862 is V
. See Figures 2 and 3 for a further
explanation of the common voltage range for single-ended and differential inputs.
t
+IN
–IN
CM
Voltage
CM
–1/2V
REF
–IN = CM Voltage
+V
REF
–V
REF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS7861EB | 制造商:Texas Instruments 功能描述:Analog/Digital Converter IC Number of Bi |
| ADS7861EB/2K5 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 500kHz 2+2 Ch Simltns Smplng 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 |
| ADS7861EB/2K5G4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 500kHz 2+2 Ch Simltns Smplng 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 |
| ADS7861EBG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 500kHz 2+2 Ch Simltns Smplng 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 |
| ADS7861EG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual 500kHz 2+2 Ch Simltns Smplng 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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