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参数资料
| 型号： | MAX194BEWE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 85KSPS 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| 位数： | 14 |
| 采样率（每秒）： | 85k |
| 数据接口： | QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 80mW |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，单极；1 个单端，双极 |
| 产品目录页面： | 1393 (CN2011-ZH PDF) |
MAX194
14-Bit, 85ksps ADC with 10A Shutdown
______________________________________________________________________________________
21
Constraints on sequencing the four power supplies are
as follows.
Apply VDDA before VDDD.
Apply VSSA before VSSD.
Apply AIN and REF after VDDA and VSSA are present.
The power supplies should settle within the
MAX194’s power-on delay (minimum 500ns) or you
should recalibrate the converter (pulse RESET low)
before use.
Be sure that digital return currents do not pass through
the analog ground and that return-current paths are low
impedance. A 5mA current flowing through a PC board
ground trace impedance of only 0.1
creates an error
voltage of about 500V, or about 1LSB error with a ±4V
full-scale system.
The board layout should ensure as much as possible
that digital and analog signal lines are kept separate.
Do not run analog and digital (especially clock) lines
parallel to one another. If you must cross one with the
other, do so at right angles.
The ADC’s high-speed comparator is sensitive to high-
frequency noise on the VDDA and VSSA power sup-
plies. Bypass these supplies to the analog ground
plane with 0.1F in parallel with 1F or 10F low-ESR
capacitors. Keep capacitor leads short for best supply-
noise rejection.
Shutdown
The MAX194 may be shut down by pulling BP/UP/
SHDN low. In addition to lowering power dissipation to
10W (100W max) when the device is not in use, con-
siderable power savings is possible by shutting the
converter down for short periods between conversions.
There is no need to perform a reset (calibration) after
the converter has been shut down unless the time in
shutdown is long enough that the supply voltages or
ambient temperature may have changed.
The time required for the converter to “wake up” and
settle depends heavily on the amount of additional error
acceptable. For 0.1LSB additional error, 3.2s is suffi-
cient settling time and also allows enough time for reac-
quisition of the analog input signal. 20s settling is
required for less than 0.05LSB error. Figure 23 is a
Figure 21. MAX194 Code Listing for 68HC16 Module and Circuit of Figure 19 (continued)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX194BEWE+ | 功能描述:模数转换器 - ADC 14Bit 85ksps 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 |
| MAX194BEWE+T | 功能描述:模数转换器 - ADC 14Bit 85ksps 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 |
| MAX194BEWE-T | 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 |
| MAX194BMDE | 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 |
| MAX194EVC16-DIP | 功能描述:模数转换器 - ADC Programmers, Development Systems 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 |
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