參數(shù)資料
型號： ADS7807PBG4
英文描述： Low-Power, 16-Bit, Sampling CMOS ANALOG-to-DIGITAL CONVERTER
中文描述： 低功耗，16位，采樣CMOS模擬數(shù)字轉(zhuǎn)換器
文件頁數(shù)： 13/24頁
文件大小： 534K
代理商： ADS7807PBG4
ADS7807
SBAS022C
13
www.ti.com
used for each input range (see Figure 8). The input resistor
divider network provides inherent over-voltage protection to
at least
±
5.5V for R2
IN
and
±
12V for R1
IN
.
Analog inputs above or below the expected range will yield
either positive full-scale or negative full-scale digital outputs,
respectively. Wrapping or folding over for analog inputs
outside the nominal range will not occur.
CALIBRATION
HARDWARE CALIBRATION
To calibrate the offset and gain of the ADS7807 in hardware,
install the resistors shown in Figure 7a. Table VI lists the
hardware trim ranges relative to the input for each input
range.
SOFTWARE CALIBRATION
To calibrate the offset and gain in software, no external
resistors are required. However, to get the data sheet speci-
fications for offset and gain, the resistors shown in Figure 7b
OFFSET ADJUST
RANGE (mV)
GAIN ADJUST
RANGE (mV)
INPUT RANGE
±
10V
±
15
±
60
0 to 5V
±
4
±
30
0 to 4V
±
3
±
30
TABLE VI. Offset and Gain Adjust Ranges for Hardware
Calibration (see Figure 7a).
FIGURE 7b. Circuit Diagrams (Without Hardware Trim).
are necessary. See the No Calibration section for more
details on the external resistors. Refer to Table VIII for the
range of offset and gain errors with and without the external
resistors.
NO CALIBRATION
Figure 7b shows circuit connections. Note that the actual
voltage dropped across the external resistors is at least two
orders of magnitude lower than the voltage dropped across
the internal resistor divider network. This should be consid-
±
10V
0V-5V
0V-4V
FIGURE 7a. Circuit Diagrams (With Hardware Trim).
±
10V
0V-5V
0V-4V
200
1
2
3
4
5
6
AGND2
REF
CAP
R2
IN
AGND1
R1
IN
+
+
2.2μF
2.2μF
1M
+5V
50k
+5V
100
33.2k
50k
V
IN
200
1
2
3
4
5
6
AGND2
REF
CAP
R2
IN
AGND1
R1
IN
+
+
2.2μF
2.2μF
1M
+5V
50k
50k
33.2k
100
V
IN
200
1
2
3
4
5
6
AGND2
REF
CAP
R2
IN
AGND1
R1
IN
+
+
2.2μF
2.2μF
33.2k
100
V
IN
1M
+5V
50k
50k
200
1
2
3
4
5
6
AGND2
REF
CAP
R2
IN
AGND1
R1
IN
+
+
2.2μF
2.2μF
100
+5V
66.5k
V
IN
200
1
2
3
4
5
6
AGND2
REF
CAP
R2
IN
AGND1
R1
IN
+
+
2.2μF
2.2μF
33.2k
100
V
IN
200
1
2
3
4
5
6
AGND2
REF
CAP
R2
IN
AGND1
R1
IN
+
+
2.2μF
2.2μF
33.2k
100
V
IN
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS7807PG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 16-Bit Sampling CMOS 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7807U 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 16-Bit Sampling CMOS 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7807U/1K 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 16-Bit Sampling CMOS 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7807U/1KE4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 16-Bit Sampling CMOS 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7807U/1KG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 16-Bit Sampling CMOS 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
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