AD7687 16位、1.5 LSB INL、250 kSPS PulSAR™差分ADC,采用MSOP/QFN封装

电池供电设备 数据采集 仪器仪表 医疗仪器 过程控制

AD7687是一款16位、电荷再分配、逐次逼近型模数转换器(ADC),采用2.3 V至5.5 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,该器件对IN+与IN-引脚之间的电压差进行采样。这两个引脚上的电压摆幅通常在0 V至REF之间、相位相反。基准电压(REF)由外部提供,最高可设置为电源电压。

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以菊花链形式联结到单根三线式总线上,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。

AD7687采用10引脚MSOP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
  • 16位分辨率、16位无失码
  • 吞吐速率:250 kSPS
  • 积分非线性(INL): 典型值±0.4 LSB,最大值±1.5 LSB(FSR的±23 ppm)
  • 动态范围: 96.5 dB
  • SNR: 95.5 dB (20 kHz)
  • 总谐波失真(THD): -118 dB (20 kHz)
  • 真差分模拟输入范围:
    • ±VREF
    • 0 V 至 VREF (两个输入上的VREF均可高达VDD)
  • 无流水线延迟
  • 采用2.3 V至5.5 V单电源供电,提供1.8 V/2.5 V/3 V/5 V逻辑接口
  • 欲了解更多特性,请参考数据手册
模数转换器 (ADC)
AD7685 IBIS Models
参考电路
数据手册
文档备注
AD7687: 16-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP Data Sheet (Rev. E)PDF 723 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
AD7687BCPZ-R2 量产LFCSP:LEADFRM CHIP SCALEREEL 250-40 至 85至00Y
AD7687BCPZRL7 量产10 ld LFCSP (3x3mm)REEL 1500-40 至 85至011.05Y
AD7687BRMZ 量产10 ld MSOPOTH 50-40 至 85至12.3711.05Y
AD7687BRMZRL7 量产10 ld MSOPREEL 1000-40 至 85至011.05Y
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 factor27Y
EVAL-AD7687SDZEvaluation Board SDP Interface99Y
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 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
AD7687: 16-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP Data Sheet (Rev. E) ad7687
AD7685 (All Models) ad7685
CN0225 Design & Integration Files adr431
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
MT-074: 精密ADC用差分驱动器 ad7687
CN-0225: 针对工业过程控制和自动化的高阻抗、高CMR、 adr431
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