您好，
内部参考电压使能，与选择参考电压源不是一个概念（数据手册 Table 36. REF Register Field Descriptions）。
对于您的应用，需使能内部参考电压，然后ADC的参考电压选择外部参考电压。
ADS125H02 ±20-V Input, 2-Channel, 40-kSPS, 24-Bit, Delta-Sigma ADC With PGA and Voltage Reference datasheet (Rev. C)
请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 尊敬的 Pavan：
Mir 已离职、因此我将提供简要帮助。 我从应用参考指南中得到了这个片段。 由于时钟和上电步骤已经存在、这仅限于 ADC 配置：
# Select ADC PTM_R4
w 30 3d 00
# Set MicPGA startup delay to 3.1ms
w 30 47 32
# Set the REF charging time to 40ms…
Each I2S data sample is a two's complement number, where the maximum value correlates to the full scale input of the ADC. The ADC has a fullscale input value of .707Vrms. This means that when the I2S reaches a maximum value, the ADC is measuring a 1Vp…
请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 module Top_TLA2518(
input clock_osc,
input sdi, // Serial data input (SDO from ADC)
output sck_o, // SPI clock to ADC (31.25 MHz)
output sdo, // SPI data out to ADC
output ss_n…
Hi,
They are similar specs, which is why the numbers are so close, but we measure them differently.
SNR is measured by grounding the ADC inputs to 0. The resulting digital output from the ADC will be the effective noise floor of the ADC. SNR by definition…
The diode is not necessary.
The AC coupling cap is required on both legs as well as the MICBIAS resistor to provide bias to the ADC input pins. Check the diagrams in the data sheet for references on this.
There is a link in the datasheet to a tool…
