参数资料
型号: MAX191BCWG+
厂商: Maxim Integrated Products
文件页数: 14/24页
文件大小: 0K
描述: IC ADC 12BIT 100KSPS W/REF24SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 30
位数: 12
采样率(每秒): 100k
数据接口: MICROWIRE?,并联,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 941mW
电压电源: 双 ±
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SOIC W
包装: 管件
输入数目和类型: 2 个单端,单极;2 个单端,双极;1 个差分,单极;1 个差分,双极
产品目录页面: 1393 (CN2011-ZH PDF)
Wire-wrap boards are not recommended. Board layout
should ensure that digital- and analog-signal lines are
separated from each other. Do not run analog and digi-
tal (especially clock) lines parallel to one another, or
digital lines underneath the ADC package.
Figure 23 shows the recommended system ground
connections. Establish a single-point ground (“star”
ground point) at AGND, separate from the logic
ground. Connect all other analog grounds and DGND
to it. No other digital-system ground should be con-
nected to this single-point analog ground. The ground
return to the power supply for this star ground should
be low impedance and as short as possible for noise-
free operation.
High-frequency noise in the VDD power supply may
affect the high-speed comparator in the ADC. Bypass
these supplies to the single-point analog ground with
MAX191
Low-Power, 12-Bit Sampling ADC
with Internal Reference and Power-Down
______________________________________________________________________________________
21
MAX191
AIN +
AIN -
D0–D11
VIN
R7
10k
R8
10k
VREF
R6
10k
R5
10k
R1
10k
R2
100
R3
10k
R4
49.9
VREF
R9*
20k
0.1
F*
R10*
49.9
* CONNECT AIN- TO AGND WHEN USING DUAL SUPPLIES
MAX480
Figure 21b. Offset (±10mV) and Gain (±1%) Trim Circuit
01 . . . 111
01 . . . 110
00 . . . 010
00 . . . 001
11 . . . 111
11 . . . 110
00 . . . 000
10 . . . 001
10 . . . 000
11 . . . 101
0V
VREF - 1LSB
VREF
––––
2
0V
SINGLE SUPPLY
VREF
AIN- = ––––
2
(
)
DUAL SUPPLY
AIN- = 0V
VREF
–––– - 1LSB
2
-VREF
––––
2
Figure 22. Bipolar Transfer Function
SUPPLIES
+5V
-5V
GND
VDD
AGND
VSS DGND
+5V
DGND
R* = 10
DIGITAL
CIRCUITRY
*OPTIONAL
MAX191
Figure 23. Power-Supply Grounding Connection
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相关代理商/技术参数
参数描述
MAX191BCWG+ 功能描述:模数转换器 - ADC 12Bit 100ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
MAX191BCWG+T 功能描述:模数转换器 - ADC 12Bit 100ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
MAX191BCWG-T 功能描述:模数转换器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
MAX191BENG 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
MAX191BENG+ 功能描述:模数转换器 - ADC 12Bit 100ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32