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参数资料
| 型号： | TSA1203IF |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | ADC |
| 英文描述： | 2-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, QFP48 |
| 封装： | 7 X 7 MM, TQFP-48 |
| 文件页数： | 8/30页 |
| 文件大小： | 440K |
| 代理商： | TSA1203IF |
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Application information
TSA1203
16/30
8.2
References and common mode connection
VREFM must always be connected directly to ground externally for most applications.
8.2.1
Internal reference and common mode
In the default configuration, the ADC operates with its own reference and common mode
voltages generated by its internal bandgap. It is recommended to decouple the VREFP and
INCM pins in order to minimize low and high frequency noise (see Figure 23).
Figure 23. Internal reference and common mode setting
8.2.2
External reference and common mode
Each of the voltages VREFP, VREFM and INCM can be fixed externally to better fit the
application needs (refer to Table 5: Operating conditions on page 7 for min/max values). It is
possible to use an external reference voltage device for specific applications requiring even
better linearity, accuracy or enhanced temperature behavior.
The VREFP and VREFM voltages set the analog dynamic range at the input of the converter
that has a full scale amplitude of 2*(VREFP-VREFM).
The INCM voltage is half the value of VREFP-VREFM.
The best signal-to-noise performance is achieved with a dynamic range at its maximum
value. To obtain this, VREFM can be connected to GND, and VREFP can be set up to 1.5 V
maximum. However, signal to noise performance is a trade-off with the THD, with a
possibility of degraded THD under these conditions.
To obtain the highest performance from the TSA1203 device, we recommend implementing
the configuration shown in Figure 24 with the STMicroelectronics TS821 or TS4041-1.2
Vref.
TSA1203
VIN
VINB
VREFM
0.89V
VREFP
330pF
4.7
μF
10nF
INCM
330pF
4.7
μF
10nF
0.46V
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相关代理商/技术参数 |
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| TSA1203IFT | 功能描述:模数转换器 - ADC Dual Channel 12-Bit 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 |
| TSA1203IFT-E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Dual-channel 12-bit 40Msps 215mW A/D converter |
| TSA1204 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:DUAL-CHANNEL, 12-BIT, 20MSPS, 120mW A/D CONVERTER |
| TSA1204_06 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Dual channel 12-bit 20Msps 120mW A/D converter |
| TSA1204IF | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:DUAL-CHANNEL, 12-BIT, 20MSPS, 120mW A/D CONVERTER |
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