AD7690 18位、1.5 LSB INL、400 kSPS PulSAR® 差分ADC,采用MSOP/QFN封装

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AD7690是一款18位、逐次逼近型模数转换器(ADC),采用单电源(VDD)供电。它内置一个低功耗、高速、18位不失码的采样ADC、一个内部转换时钟和一个多功能串行接口。在CNV上升沿,AD7690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为0 V到REF,相位相反。基准电压(REF)由外部提供,最高可以设置为电源电压。

AD7690的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。它采用独立的VIO电源,与1.8V、2.5V、3V或5V逻辑兼容。

AD7690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

数据手册, Rev. A, 3/07

产品特点和性能优势
  • 18位分辨率、无失码
  • 吞吐量:400 kSPS
  • INL:±0.75 LSB(典型值),±1.5 LSB(最大值)(FSR的±6 ppm)
  • 动态范围:102 dB (400 kSPS )
  • 过采样动态范围:125 dB ( 1 kSPS )
  • 无噪声分辨率:20 bits ( 1 kSPS )
  • 有效分辨率: 22.7 bits (1 kSPS )
  • SINAD: 101.5 dB ( 1 kHz)
  • THD: −125 dB (1 kHz )
  • 真差分模拟输入范围: ±VREF 0 V ~ VREF ,两个输入上的VREF均可高达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
模数转换器 (ADC)
AD7685 IBIS Models
数据手册
文档备注
AD7690: 18-Bit, 1.5 LSB INL, 400 kSPS PulSAR® Differential ADC in MSOP/QFN Data Sheet (Rev. C)PDF 736 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
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
AD7690BCPZRL7 量产10 ld LFCSP (3x3mm)REEL 1500-40 至 85至019.73Y
AD7690BRMZ 量产10 ld MSOPOTH 50-40 至 85至21.8319.73Y
AD7690BRMZ-RL7 量产10 ld MSOPREEL 1000-40 至 85至019.73Y
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 factor27Y
EVAL-AD7690SDZEvaluation Board SDP Interface99Y
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
AD7690: 18-Bit, 1.5 LSB INL, 400 kSPS PulSAR® Differential ADC in MSOP/QFN Data Sheet (Rev. C) ad7690
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
MT-074: 精密ADC用差分驱动器 ad7687
Front-End Amplifier and RC Filter Design for a Precision SAR... ad7685
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