AD7942 14位、250 kSPS PulSAR®、伪差分ADC,采用MSOP/LFCSP封装

AD7942是一款14位、电荷再分配、逐次逼近型PulSAR® ADC,采用2.3 V至5.5 V单电源(VDD)供电。该器件内置一个低功耗、高速、14位无失码采样ADC、一个内部转换时钟和一个多功能串行接口端口。 还集成了一个低噪声、宽带宽、短孔径延迟的采样保持电路。 在CNV上升沿,AD7942对IN+与IN-之间的模拟输入电压差进行采样,范围从0 V至VREF。 基准电压(VREF)由外部提供,最高可设置为电源电压。 其功耗和吞吐量呈线性变化关系。

SPI兼容串行接口还能够利用SDI输入,将几个ADC以菊花链形式连结到一个三线式总线上,并提供一个可选的繁忙指示。 采用独立电源(VIO)时,该器件与1.8V、2.5V、3V或5V逻辑兼容。

AD7942采用10引脚MSOP或10引脚LFCSP封装,但尺寸与8引脚MSOP或SOT-23封装相同,工作温度范围为−40℃至+85℃。

应用
  • 电池供电设备
  • 数据采集
  • 仪器仪表
  • 医疗仪器
  • 过程控制
产品特点和性能优势
  • 14位分辨率、无失码
  • 吞吐速率: 250 kSPS
  • 积分非线性(INL):
    典型值±0.4 LSB,最大值±1 LSB(FSR的±0.0061%)
  • 信纳比(SINAD): 85 dB @ 20 kHz
  • 总谐波失真(THD): -100 dB @ 20 kHz
  • 伪差分模拟输入范围
    0 V至VREF(VREF最高为VDD)
  • 无流水线延迟
  • 欲了解更多信息,请参考数据手册
模数转换器 (ADC)
AD7685 IBIS Models
数据手册
文档备注
AD7942: 14-Bit, 250 kSPS PulSAR; Pseudo Differential ADC in MSOP/LFCSP Data Sheet (Rev. C)PDF 549 kB
应用笔记
文档备注
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)PDF 299 kB
AN-932: 电源时序控制 (Rev. 0)PDF 95 kB
AN-931: 了解PulSAR ADC支持电路 (Rev. 0)PDF 370 kB
AN-932: Power Supply Sequencing (Rev. 0)PDF 95 kB
用户手册
文档备注
UG-340: Evaluation Board for the 10-Lead Family 14-/16-/18-Bit PulSAR ADCsPDF 4636 kB
UG-682: 6-Lead SOT-23 ADC Driver for the 8-/10-Lead Family of 14-/16-/18-Bit PulSAR ADC Evaluation BoardsPDF 433.96 K
产品聚焦
文档备注
8- to 18-Bit SAR ADCs ... From the Leader in High Performance AnalogPDF 1885 kB
订购信息
产品型号封装包装数量温度范围美金报价 100-499美金报价 1000+RoHS
AD7942BCPZRL7 量产10 ld LFCSP (3x3mm)REEL 1500-40 至 85至05.87Y
AD7942BRMZ 量产10 ld MSOPOTH 50-40 至 85至6.995.87Y
AD7942BRMZ-RL7 量产10 ld MSOPREEL 1000-40 至 85至05.87Y
评估板
产品型号描述美金报价RoHS
EVAL-AD7685-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7686-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7687-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7688-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7690-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7691-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7693-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7942-PMDZEvaluation Board PMOD compatible form factor27Y
EVAL-AD7942SDZEvaluation Board SDP Interface99Y
EVAL-AD7946-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7980-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7982-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7983-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7984-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7988-1-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-AD7988-5-PMDZEvaluation Board PMOD compatible form factor 27Y
EVAL-SDP-CB1ZEvaluation Controller Board SDP99Y
SDP-PMD-IB1ZEvaluation Interposer Board PMOD to SDP w/ Power Supply55Y
参考资料
AD7942: 14-Bit, 250 kSPS PulSAR; Pseudo Differential ADC in MSOP/LFCSP Data Sheet (Rev. C) ad7942
AD7685 (All Models) ad7685
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0) ad7476
AN-932: 电源时序控制 (Rev. 0) ad7628
AN-931: 了解PulSAR ADC支持电路 (Rev. 0) ad7476
AN-932: Power Supply Sequencing (Rev. 0) ad7660
UG-340: Evaluation Board for the 10-Lead Family 14-/16-/18-Bit PulSAR ADCs ad7685
UG-682: 6-Lead SOT-23 ADC Driver for the 8-/10-Lead Family of 14-/16-/18-Bit PulSAR ADC Evaluation Boards ad7685
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog ad7893
MS-2210:高速ADC的电源设计 ad9861
MS-1779:九项常被忽略的ADC技术规格 ad6672