參數(shù)資料
型號(hào)： MAX1191
廠商： Maxim Integrated Products, Inc.
元件分類： ADC
英文描述： Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
中文描述： 超低功耗、7.5Msps、雙路、8位ADC
文件頁(yè)數(shù)： 22/27頁(yè)
文件大?。?/td> 492K
代理商： MAX1191
M
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
22
______________________________________________________________________________________
Figure 11 shows the MAX6066 precision bandgap ref-
erence used as a common reference for multiple con-
verters. The 2.500V output of the MAX6066 is followed
by a 10Hz lowpass filter and precision voltage-divider.
The MAX4254 buffers the taps of this divider to provide
the 1.75V, 1.5V, and 1.25V sources to drive REFP,
REFN, and COM. The MAX4254 provides a low offset
voltage and low noise level. The individual voltage fol-
lowers are connected to 10Hz lowpass filters, which fil-
ter both the reference-voltage and amplifier noise to a
level of 3nV/
√
Hz
. The 1.75V and 1.25V reference volt-
ages set the differential full-scale range of the associat-
ed ADCs at ±0.5V.
The common power supply for all active components
removes any concern regarding power-supply
sequencing when powering up or down.
With the outputs of the MAX4252 matching better than
0.1%, the buffers and subsequent lowpass filters sup-
port as many as 160 MAX1191s.
MAX4254
1/4
47
3V
2
2
2.500V
3
1
1
REFP
V
DD
MAX1191
N = 1
27
GND
NOTE:
ONE FRONT-END
REFERENCE CIRCUIT
SUPPORTS UP TO 160 MAX1191s.
3
0.1
μ
F
10
μ
F
6V
1
μ
F
1%
30.1k
1%
10.0k
0.1
μ
F
2.2
μ
F
330
μ
F
6V
0.33
μ
F
26
24
0.33
μ
F
REFN
REFIN
REFIN
25
0.33
μ
F
COM
MAX6066
1.748V
1%
10.0k
1%
49.9k
REFP
V
DD
MAX1191
N = 160
27
GND
0.33
μ
F
26
24
0.33
μ
F
REFN
25
0.33
μ
F
COM
1.47k
MAX4254
47
6
5
7
10
μ
F
6V
330
μ
F
6V
1.498V
1.47k
47
9
10
8
10
μ
F
6V
330
μ
F
6V
1.248V
MAX4254
1.47k
1M
MAX4254
13
12
14
11
4
0.1
μ
F
UNCOMMITTED
1M
3V
1/4
1/4
1/4
Figure 11. External Unbuffered Reference Driving 160 ADCs with MAX4254 and MAX6066
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1191ETI 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
MAX1191ETI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 2Ch 7.5Msps 3.6V Precision 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
MAX1191ETI+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 2Ch 7.5Msps 3.6V Precision 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
MAX1191ETI-T 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
MAX1192ETI 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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