AD7946 14位、500 kSPS PulSAR® ADC,采用MSOP封装

电池供电设备 数据采集 仪器仪表 医疗仪器 过程控制

AD7946是一款14位、500 kSPS、电荷再分配、逐次逼近型模数转换器(ADC),采用5 V单电源(VDD)供电。该器件内置一个极低功耗、高速、16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、极短孔径延迟的采样保持电路。在/CNV上升沿,AD7946对IN+与IN-之间的模拟输入电压差进行采样,范围从0V至REF。基准电压(REF)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单三线式总线上,并提供一个可选的忙闲指示。采用独立电源VIO时,该器件与1.8V、2.5V、3V或5V逻辑兼容。

AD7946采用10引脚µSOIC封装或10引脚QFN (LFCSP)封装,工作温度范围为-40°C至+85°C。

应用

产品特点和性能优势
  • 14位分辨率、无失码
  • 吞吐量:500 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REF
    (REF最高为VDD
  • 无流水线延迟
  • 采用5 V单电源供电,
    含1.8 V/2.5 V/3 V/5 V逻辑接口
  • 1.8 V/2.5 V/3 V/5 V逻辑接口
  • 串行接口:
    SPI®/QSPI™/MICROWIRE™/DSP兼容
  • 以菊花链形式连接多个ADC和忙闲指示功能
  • 功耗:3.3 mW(5 V、100 kSPS),3.3 µW(5 V、100 SPS)
模数转换器 (ADC)
AD7685 IBIS Models
数据手册
文档备注
AD7946: 14-Bit, 500kSPS PulSAR ADC in MSOP and LFCSP Data Sheet (Rev. B)PDF 637 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
AD7946BCPZRL7 最后一次采购10 ld LFCSP (3x3mm)REEL 1500-40 至 85至07.46Y
AD7946BRMZ 量产10 ld MSOPOTH 50-40 至 85至10.199.1Y
AD7946BRMZRL7 量产10 ld MSOPREEL 1000-40 至 85至09.1Y
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 factor 27Y
EVAL-AD7946-PMDZEvaluation Board PMOD compatible form factor27Y
EVAL-AD7946SDZEvaluation Board SDP Interface99Y
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 Board99Y
SDP-PMD-IB1ZEvaluation Interposer Board PMOD to SDP w/ Power Supply55Y
参考资料
AD7946: 14-Bit, 500kSPS PulSAR ADC in MSOP and LFCSP Data Sheet (Rev. B) ad7946
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