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| 型号： | MAX11131ATI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/37页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SRL 28-TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 25 |
| 位数： | 12 |
| 采样率（每秒）： | 3M |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 2.76W |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 管件 |
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31
Maxim Integrated
MAX11129–MAX11132
3Msps, Low-Power, Serial 12-/10-Bit,
8-/16-Channel ADCs
Figure 10. SampleSet Timing Diagram
Applications Information
How to Program Modes
1) Configure the ADC (set the MSB on DIN to 1).
2) Program ADC mode control (set the MSB on DIN to 0)
to begin the conversion process or to control power
management features.
IfADCmodecontroliswrittenduringaconversion
sequence, the ADC finishes the present conver-
sion and at the next falling edge of CS initiates its
new instruction.
Ifconfigurationdata(MSBonDINisa1)iswritten
during a conversion sequence, the ADC finishes
the present conversion in the existing scan mode.
However, data on DOUT is not valid in following
frames until a new ADC mode control instruction
is coded.
Programming Sequence Flow Chart
See Figure 11 for programming sequence.
Layout, Grounding, and Bypassing
For best performance, use PCBs with a solid ground
plane. Ensure that digital and analog signal lines are
separated from each other. Do not run analog and digital
(especially clock) lines parallel to one another or digital
lines underneath the ADC package. Noise in the VDD,
OVDD, and REF affects the ADC’s performance. Bypass
the VDD, OVDD, and REF to ground with 0.1FF and 10FF
bypass capacitors. Minimize capacitor lead and trace
lengths for best supply-noise rejection.
Choosing an Input Amplifier
It is important to match the settling time of the input
amplifier to the acquisition time of the ADC. The conver-
sion results are accurate when the ADC samples the
input signal for an interval longer than the input signal’s
worst-case settling time. By definition, settling time is
the interval between the application of an input voltage
step and the point at which the output signal reaches
and stays within a given error band centered on the
resulting steady-state amplifier output level. The ADC
input sampling capacitor charges during the sampling
cycle, referred to as the acquisition period. During this
acquisition period, the settling time is affected by the
input resistance and the input sampling capacitance.
This error can be estimated by looking at the settling
of an RC time constant using the input capacitance
and the source impedance over the acquisition time
period. Figure 13 shows a typical application circuit. The
MAX4430, offering a settling time of 37ns at 16-bit reso-
lution, is an excellent choice for this application. See the
THD vs. Input Resistance graph in the Typical Operating
Characteristics.
CS
SCLK
DIN
ENTRY 1
WRITE SampleSet REGISTER
DEFINE SEQ_LENGTH
WRITE ADC MODE CONTROL
OR CONTINUE WITH ADDITIONAL
CONFIGURATION SETTINGS
ENTRY 2
ENTRY N = (SEQ_LENGTH)
DOUT
1
16
LOAD SampleSet PATTERN
TIME BETWEEN CS FALLING AND
RISING EDGE DEPENDS IN SEQ_LENGTH
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX11131ATI+ | 功能描述:模数转换器 - ADC 12Bit 16Ch 3Msps 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 |
| MAX11131ATI+T | 功能描述:模数转换器 - ADC 12Bit 16Ch 3Msps 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 |
| MAX11131AUI+ | 功能描述:模数转换器 - ADC 12Bit 16 Ch 3Msps Serial 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 |
| MAX11131AUI+T | 功能描述:模数转换器 - ADC 12Bit 16 Ch 3Msps Serial 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 |
| MAX11131EVKIT# | 功能描述:数据转换 IC 开发工具 MAX11131 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
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